WO2010064910A1

WO2010064910A1 - Sample taking apparatus

Info

Publication number: WO2010064910A1
Application number: PCT/NL2009/050733
Authority: WO
Inventors: Edwin SCHÄPERCLAUS; Jeroen Martin Van Dijk; Sietze Kloostra
Original assignee: Nederlandsche Apparatenfabriek NEDAP NV
Current assignee: Nederlandsche Apparatenfabriek NEDAP NV
Priority date: 2008-12-03
Filing date: 2009-12-02
Publication date: 2010-06-10
Anticipated expiration: 2011-06-03
Also published as: NL2002280C2

Abstract

A sample taking apparatus for obtaining a sample liquid stream from a main liquid stream wherein the sample liquid stream is a predetermined percentage of the main liquid stream, wherein the sample taking apparatus is provided with at least one liquid stream divider for dividing a basic liquid stream into a first liquid stream and at least a second liquid stream, wherein the liquid stream divider is provided with a basic gutter provided with a basic inlet and a basic outlet, a first successive gutter and at least a second successive gutter wherein the first successive gutter is provided with a first successive inlet and the at least one second successive gutter is provided with a second successive inlet, wherein the basic gutter opens via the basic outlet into the first successive gutter via the first successive inlet and into the at least one second successive gutter via the second successive inlet, wherein the basic outlet and the first successive inlet are situated opposite each other and wherein the divider is so arranged that the liquid level in the basic outlet and the liquid level in the first successive inlet are equal to each other, wherein these liquid levels can vary depending on the magnitude of the flow of the basic liquid stream, wherein the first successive inlet and the basic outlet have a shape such that, in use, for each possible liquid flow in the basic gutter, it holds that the magnitude of the surface of an inlet cross section of the liquid stream through the first successive inlet, which inlet cross section lies in a plane of the first successive inlet, is a predetermined factor smaller than the magnitude of the surface of an outlet cross section of the liquid stream through the basic outlet, which outlet cross section lies in a plane of the basic outlet, so that the flow of the first liquid stream in the first successive gutter is the predetermined factor smaller than the flow of the basic liquid stream in the basic gutter.

Description

Title: Sample taking apparatus

The invention relates to a sample taking apparatus for obtaining a sample liquid stream from a main liquid stream, wherein the sample liquid stream is a predetermined percentage of the main liquid stream. In particular, this concerns a sample taking apparatus for obtaining a sample liquid stream from a main liquid stream that consists of milk. Such a sample taking apparatus serves to obtain a representative sample of milk during a milking. For practical reasons, it is desirable in that case to take a sample in an order of magnitude of one percent. It is important that this be done consistently during the whole milking run. This means that given a milk flow of 0.5 liters per minute, one percent should be taken, but that given a milk flow of 5 liters per minute, also one percent should be taken.

The current sample taking apparatuses work according to the "fill and dump" principle. This means that a tube is completely filled during particular periods. This has adverse consequences for the vacuum behavior which may give the cow trouble. Furthermore, it holds that the known sample taking apparatus in use mostly depends on the milk meter in place. This may lead to inaccuracies when the properties and protocols of the milk meter in question are not properly taken into account.

The invention contemplates the provision of a sample taking apparatus that meets the above-mentioned disadvantages. To this end, the sample taking apparatus is characterized in that the sample taking apparatus is provided with at least one liquid stream divider for dividing a basic liquid stream into a first liquid stream and at least a second liquid stream, wherein the liquid stream divider is provided with a basic gutter provided with a basic inlet and a basic outlet, a first successive gutter and at least a second successive gutter, wherein the first successive gutter is provided with a first successive inlet and the at least one second successive gutter is provided with a second successive inlet, wherein the basic gutter opens via the basic outlet into the first successive gutter via the first successive inlet and into the at least one second successive gutter via the second successive inlet, wherein the basic outlet and the first successive inlet are situated opposite each other and wherein the divider is so arranged that the liquid level in the basic outlet and the liquid level in the first successive inlet are equal to each other, wherein these liquid levels can vary depending on the magnitude of the flow of the basic liquid stream, wherein the first successive inlet and the basic outlet have a shape such that, in use, for each possible liquid flow in the basic gutter, it holds that the magnitude of the surface of an inlet cross section of the liquid stream through the first successive inlet, which inlet cross section lies in a plane of the first successive inlet, is a predetermined factor smaller than the magnitude of the surface of an outlet cross section of the liquid stream through the basic outlet, which outlet cross section is in a plane of the basic outlet, so that the flow of the first liquid stream in the first successive gutter is the predetermined factor smaller than the flow of the basic liquid stream in the basic gutter.

As, according to the invention, it is not necessary that the basic outlet and the first successive inlet be completely filled for dividing the basic liquid stream into a first liquid stream and a second liquid stream with the flow through the first successive gutter being the predetermined factor smaller than the flow through the basic gutter, the sample taking apparatus can be applied universally. This is because the sample taking apparatus can work independently of the magnitude of the flow of the basic liquid stream. As the liquid levels mentioned can vary depending on the magnitude of a flow of the liquid flowing through the basic gutter, it is optimally achieved that the sample taking apparatus does not have adverse consequences for the vacuum behavior which may give a cow trouble during milking.

A further advantage of the sample taking apparatus according to the invention is that it can be made less sensitive to a blockade of the relatively small first successive outlet by fouling. The reason is that, because the first successive outlet, in use, does not need to be filled completely, it can be made of random magnitude. In other words, the dimensioning of the basic outlet can be adapted to a desired size and shape of the first successive outlet. In particular, it holds here that the liquid levels in the basic gutter, basic outlet, the first successive inlet, and the first successive gutter, as well as in particular in the at least one second successive inlet and the at least one second successive gutter can vary depending on the magnitude of the flow of the liquid flowing through the basic gutter, wherein in particular the liquid levels in the basic outlet and the first successive inlet in a direction that, in use, is perpendicular to a flow direction of the liquid through the basic gutter can vary depending on the magnitude of the flow of the liquid flowing through the basic gutter.

More particularly, it holds here that the apparatus is so dimensioned that, in use, at a predetermined maximum flow of the main liquid stream, the basic gutter, the basic outlet and the first successive inlet are not completely filled with the liquid and that preferably at the predetermined maximum flow also the first successive gutter, the at least one second successive inlet and the at least one second successive gutter are not completely filled.

According to a practical embodiment, it holds that, in use, the inlet cross section is directed perpendicular to a direction of the liquid stream through the successive inlet and/or that the outlet cross section is directed perpendicular to the flow direction of the liquid through the basic outlet. Preferably, it holds that the basic outlet is provided with two opposite outlet sidewalls and possibly a flat bottom and the first successive inlet is provided with two opposite successive inlet sidewalls and possibly a flat bottom, wherein for each liquid level in the basic gutter it holds that the distance between the successive inlet sidewalls measured along a surface of the liquid in the first successive inlet is the predetermined factor smaller than the distance between the basic outlet sidewalls measured along a surface of the liquid in the basic outlet.

For each of the above outlined embodiments it holds that the basic liquid stream is equal to the main liquid stream and that the first liquid stream is equal to the sample liquid stream so that the predetermined percentage is equal to the predetermined factor.

It is also possible, however, that the apparatus is provided with a plurality of liquid stream dividers wherein a first liquid stream of a first liquid stream divider of the plurality of liquid stream dividers forms the basic liquid stream of a second liquid stream divider of the plurality of liquid stream dividers so that the predetermined percentage is equal to the product of the predetermined factor of the liquid stream divider. If the sample taking apparatus were provided with two liquid stream dividers each taking a sample of ten percent, in this way a sample taking apparatus can be obtained that takes a sample of one percent. An advantage here is that the above-mentioned ratio between the basic outlet and the first successive outlet needs to be only 1:10 instead of 1:100 if the sample taking apparatus were provided with one liquid stream divider. This in turn has as an advantage that the respective magnitude of the first successive outlet can be made ten times greater at an equal magnitude of the basic outlet. As a result, the first successive inlet will be less sensitive to fouling.

According to a practical further elaboration, it then holds that for one of the liquid stream dividers of the plurality of liquid stream dividers it holds that the main liquid stream is equal to the basic liquid stream and wherein for another of the plurality of liquid stream dividers it holds that a first liquid stream is equal to the sample liquid stream so that the predetermined percentage is equal to the product of the predetermined of the liquid stream divider. In particular, it then holds furthermore that the apparatus is provided with merging means for combining into a sub main liquid stream all second liquid streams of all liquid stream dividers of the plurality of liquid stream dividers.

The above-mentioned liquid streams within the sample taking apparatus can have different directions in different embodiments. These directions include in particular the horizontal directions and vertical directions.

In particular, it holds that the basic gutter of the at least one liquid stream divider is provided with a bottom and two upstanding sidewalls running at least substantially parallel to each other wherein the basic outlet is bounded by the bottom and the upstanding sidewalls of the basic gutter, and the first successive gutter of the at least one liquid stream divider is provided with a bottom and two upstanding sidewalls running at least substantially parallel to each other wherein the first successive inlet is bounded by the bottom and the upstanding sidewalls of the first successive gutter and wherein a distance between the upstanding sidewalls of the first successive gutter is the predetermined factor smaller than the distance between the upstanding sidewalls of the basic gutter.

It preferably holds here that the basic gutter is at least substantially horizontally directed and that possibly the first successive gutter is at least substantially horizontally directed. More particularly, it holds furthermore that the second successive gutter is at least substantially horizontally directed. It is also possible, however, that the basic gutter and the first successive gutter are at least substantially vertically directed. In particular, it holds here that in the basic gutter liquid stream regulation means are arranged which provide that the liquid level in the basic outlet extends from a side of the basic outlet in a direction directed away from this side to a position whose distance up to said side can vary with the magnitude of the flow of the basic liquid stream in the basic gutter. According to a preferred embodiment, it holds here that for the liquid stream regulation means of at least one of the dividers or for the liquid regulation means of each divider it holds that it is provided with at least one upstanding sidewall extending around the basic outlet of the respective divider, from the basic outlet of the respective divider in a direction directed away from a plane through the basic outlet of the respective divider against a flow direction of the basic gutter of the respective divider, in the basic gutter of the respective divider, wherein in the upstanding sidewall of the liquid stream regulation means of the respective divider at least one overflow opening is provided with a lower edge generally sloping downwards with a decreasing magnitude of a horizontal component of a distance of a point of the lower edge to the side 92 of the basic outlet and wherein between the overflow opening and the upstanding sidewalls of the basic gutter of the respective divider a free space is present. According to a practical variant, it holds that the divider is provided with a chamber having included therein a housing wherein an upper side of the housing has the shape of an oblique pointed roof, wherein along the ridge of the roof-shaped upper side the first successive outlet is arranged, wherein a space in the housing that is contiguous to the first successive outlet forms the first successive gutter and the space in the chamber though outside the housing forms the at least one second successive gutter.

The invention will presently be elucidated in more detail on the basis of the drawing, in which: Fig. Ia shows a top plan view of a first embodiment of a sample taking apparatus according to the invention;

Fig. Ib shows in perspective the sample taking apparatus according to Fig. Ia; Fig. 2a is a transparent view of a second embodiment of a sample taking apparatus according to the invention;

Fig. 2b shows a view of the sample taking apparatus according to Fig. 2a in the direction of the arrow Pl, with two sidewalls omitted;

Fig. 2c shows a top plan view of the sample taking apparatus according to Fig. 2a;

Fig. 2d shows a side view of the sample taking apparatus according to Fig. 2a in the direction of the arrow P2; and

Fig. 3a shows a first embodiment of a milking apparatus for milking animals provided with a sample taking apparatus according to Figs. 1 or 2;

Fig. 3b shows a second embodiment of a milking apparatus for milking animals provided with a sample taking apparatus according to Figs. 1 or 2;

Fig. 4.1a shows a side view of a partly filled basic outlet of the apparatus according to Fig. Ia;

Fig. 4.1b shows a side view of a partly filled first successive inlet of the apparatus according to Fig. Ia;

Fig. 4.2a shows a side view of an alternative embodiment of a basic outlet of the apparatus according to Fig. Ia; Fig. 4.2b shows a side view of an alternative embodiment of a first successive inlet of the apparatus according to Fig. Ia and associated with the basic outlet according to Fig. 4.2a;

Fig. 4.3 shows a side view of an alternative embodiment of a basic outlet of the apparatus according to Fig. Ia; Fig. 5a shows a transparent view of the third embodiment of a sample taking apparatus according to the invention;

Fig. 5b shows a view of the sample taking apparatus according to Fig. 5a in the direction of the arrow Pl with two sidewalls omitted; Fig. 5c shows a top plan view of the sample taking apparatus according to Fig. 5a; and

Fig. 5d shows a side view of an alternative embodiment of a basic inlet of the apparatus according to Fig. 5a.

In Fig. Ia a sample taking apparatus is designated with reference numeral 1. The sample taking apparatus in this example is provided with a liquid supply opening 2, a sub liquid discharge opening 4, and a sample liquid discharge opening 6. In use, the sample taking apparatus 1 may be included in an automatic milking apparatus 8 as shown in Fig. 3. The milking apparatus 8 is provided with a milk line 10 which extends from a milk claw 12 to a milk vat 14. In the milk line 10 a sample taking apparatus 1 according to Fig. Ia is included. Furthermore, a pump 16 is connected to the milk vat through a line 11 for creating a reduced pressure with respect to the outside air, in the milk vat, in the sample taking apparatus 1, in the milk line 10 and in the milk claw 12. This reduced pressure to, for example, 0.5 atm will hereinafter also be referred to as vacuum or vacuum pressure. Via a line 13, the pump is furthermore connected directly with the milk claw for creating a pulsatingly changing pressure in the milk claw for milking. The milk claw 12 is connected through four milk lines 18 with four teat cups 20. Through these, an animal will proceed to give milk which is drawn through the milk claw 12 and the milk line 10 to the liquid supply opening 2 in connection with the reduced pressure applied in the milk vat. The sample taking apparatus splits this main milk stream 22 into a sub milk stream 24 which is supplied to the milk vat 14 (as a result of the reduced pressure in the milk vat) and a sample milk stream 26 which is supplied to a sample milk vat 28. In this example, the sample vat and the line 26 are of at least substantially airtight design, to provide that the reduced pressure in the system can be easily maintained. In this example, the sample taking apparatus 1 is so arranged that the sample milk stream amounts to one percent of the main milk stream, independently of the flow of the main milk stream. Furthermore, the sub milk stream accordingly amounts to ninety- nine percent of the main milk stream, independently of the flow of the main milk stream.

A possible embodiment of the sample taking apparatus is presently discussed in more detail with reference to Figs. Ia and Ib. The sample taking apparatus 1 in this example is provided with a first liquid stream divider 30 and a second liquid stream divider 32. The first liquid stream divider 30 is provided with a basic gutter 34, a first successive gutter 36 and at least a second successive gutter 38. The basic gutter is provided with a basic inlet which in this example consists of the liquid supply opening 2. The basic gutter 34 is further provided with a basic outlet 40, represented in dots. Furthermore, the first successive gutter is provided with a first successive inlet 42, represented in dots, and the second successive gutter 38 is provided with a second successive inlet 44, represented in dots. The basic gutter 34 is provided with a bottom 46 and two upstanding sidewalls 48, 50, which run, at least substantially, parallel to each other. As appears from the drawing, the basic outlet 40 is bounded by the bottom 46 and the upstanding sidewalls 48, 50 of the basic gutter of the first liquid stream divider 30. The bottom 46 hence forms a flat bottom of the basic outlet and the upstanding sidewalls 48, 50 form outlet sidewalls of the basic outlet. The first successive gutter 36 of the liquid stream divider 30 is provided with a bottom 52 and two upstanding sidewalls 54, 56, which run, at least substantially, parallel to each other. Furthermore, it holds that the second successive gutter 38 of the first liquid stream divider 30 is provided with a bottom 58 and two upstanding sidewalls 60, 62, which run, at least substantially, parallel to each other. The bottom 52 thus forms a flat bottom of the first successive inlet and the upstanding sidewalls 54, 56 form successive inlet sidewalls of the first successive inlet. Furthermore, it holds that the second successive inlet 42 is bounded by the bottom 52 and the upstanding sidewalls 54, 56 of the first successive gutter 36 of the first liquid stream divider 30. Furthermore, it holds that the first successive outlet 44 is bounded by the bottom 58 and the upstanding sidewalls 60, 62 of the second successive gutter 38 of the first liquid stream divider 30. Also, it holds in this example that the basic outlet 40 and the first successive inlet 42 are situated opposite each other. Further, it holds in this example that the upstanding sidewalls of the first successive gutter have a distance dl and the upstanding sidewalls of the basic gutter have a distance D. It holds that the distance dl between the upstanding sidewalls of the first successive gutter is a predetermined factor, in this example ten, smaller than the distance D between the upstanding sidewalls 48, 50 of the basic gutter 34. The first and second successive gutter have a common sidewall 56, 60. At its upper side the apparatus is closed off with a cover 200. The apparatus is thus provided with a housing 202 which is formed by upstanding sidewalls 204, 206 situated on the outside of the apparatus, a bottom 208 of the apparatus, and the cover 200. The housing is provided with the liquid supply opening 2 to which, in use, the main milk stream is supplied, the sample liquid discharge opening 6 which, in use, delivers the sample liquid stream and the sub liquid discharge opening 4 which in use delivers a sub milk stream that is equal to the main milk stream excluding the sample milk stream, with the first liquid stream divider 30 situated in the housing. The housing, with the exception of the liquid supply opening 2, the sub liquid discharge opening 6 and the sample liquid discharge opening 4, is of airtight design.

The operation of the first liquid stream divider is as follows. Suppose a basic liquid stream 64 is supplied to the basic gutter 34. This basic liquid stream 64 results in a height hi of the liquid level (see Fig. Ib) in the basic gutter 34. The liquid stream 64 hence has a height hi and a width D. The liquid stream having the height hi and the width D leaves the basic gutter 34 via the basic outlet 40. Here, the basic stream 64 is split into a first successive stream 66 and a second successive stream 68. It holds that the first successive stream 66 has a width dl and also a height hi. Further, it holds that the second successive stream has a width d2 and a height hi. Because the height of the first successive stream in the first successive gutter is equal to the height of the basic liquid stream 64 in the basic gutter 40, it holds that the flow of the first successive stream 66 is a predetermined factor smaller than the flow of the main stream 64, this factor being equal to dl/D=10.

It should be noted here that the liquid level hi in the basic gutter, the liquid level hi in the basic outlet and the liquid level hi in the first successive outlet of the first liquid divider are equal to each other. These liquid levels, however, may vary depending on the magnitude of the flow of the basic liquid stream. If the flow of the basic liquid stream 64, for example, increases, this can result in the height hi increasing. This height hi, however, will increase not only in the basic gutter 34 but also in the basic outlet 40 and the first successive inlet 42. This in turn has as a result that independently of the height hi, and hence independently of the magnitude of the flow of the basic liquid stream, the magnitude of the flow of the first liquid stream is the above-mentioned factor ten smaller than the magnitude of the flow of the basic liquid stream, independently of the magnitude of the flow of the basic liquid stream and hence of the height hi of the basic liquid stream in the basic gutter. Incidentally, also the liquid level in the two successive outlets will be equal to hi.

It holds, then, that the liquid levels in the basic outlet and first successive inlet may vary depending on the magnitude of the flow of the basic liquid stream, while the first successive inlet 42 and the basic outlet 40 have such a shape that, in use, it holds for each possible liquid level in the basic gutter that the magnitude of the surface of an inlet cross section of the liquid stream through the first successive inlet (in the example this surface is equal to dl*hl), which inlet cross section lies in a plane of the first successive inlet, is a predetermined factor (in this example D/dl) smaller than the magnitude of the surface of an outlet cross section of the liquid stream through the basic outlet, which outlet cross section lies in a plane of the basic outlet (and which in this example has a magnitude of D*hl) so that the flow through the first successive gutter 38 is the predetermined factor (in this example D/d) smaller than the flow through the basic gutter. This concerns a condition.

In Fig. 4.1a the magnitude of the surface of an inlet cross section of the liquid stream 64 through the basic outlet 40, which outlet cross section lies in a plane of the basic outlet, is shown in obliquely hatched representation when the height of the liquid level in the basic gutter 34 is equal to hi. Entirely analogously, in Fig. 4.1b there is shown in obliquely hatched representation the magnitude of the surface of an inlet cross section of the liquid stream 66 through the first successive inlet 42 which inlet cross section lies in a plane of the first successive inlet, in hatched representation, when the height of the liquid level in the basic gutter is equal to hi. From Fig. 4.1a it is clear that the magnitude of the respective surface is equal to hl*D, while from Fig. 4.1b it is clear that the magnitude of the respective surface is equal to hl*dl. This, in turn, means that the magnitude of the respective surface of Fig. 4..Ib is a factor D/dl smaller than the magnitude of the respective surface in Fig. 4. Ia, this being independent of the height hi. In Figs. 4.1a and 4.1b the respective surfaces are also indicated when the height of the liquid level in the basic gutter is equal to h2.

The condition mentioned, however, can also be formulated differently. For it also holds that the first successive inlet 42 and the basic outlet 40 have such a shape that for each possible liquid level in the basic gutter it holds that, in use, the total length Zl of the surface of the liquid in the direction that lies in a plane of the first successive inlet is a predetermined factor (in this example ten) smaller than the total length 12 of the surface of the liquid in a direction that lies in a plane of the basic outlet. These lengths Zl and 12 are given in this example when the liquid level has a height hi, with the arrow indicated with /2 and the arrow indicated with Zl each extending along the liquid surface. Because it holds for each value of hi that 12/11=10, this is another way of saying that the magnitude of the respective surfaces are equal to each other for each value of hi, as discussed above. For the sake of clarity, incidentally, in Fig. 4.1b also a cross section of the liquid stream through the second successive gutter 38 is designated, which liquid stream has a width D-dl.

For the sake of completeness, it is noted that the first successive inlet, the basic outlet and the second successive inlet can also have different shapes, such that the surfaces mentioned have the respective ratios. An example of this is shown in Fig. 4.2a and Fig. 4.2b. In this example, the basic gutter is in the shape of a V. The bottom 46 of the basic gutter is here in fact in the form of a line. This also holds for the bottoms 52 and 58 of the first successive gutter 36 and the second successive gutter 38 which gutters also in fact each have the shape of a V. The upstanding sidewall 54 of the first successive gutter and the upstanding sidewall 62 of the second successive gutter are respectively situated in line with the upstanding sidewall 48 and the upstanding sidewall 50 of the basic gutter.

Furthermore, it holds again that the sidewall 56, 60 is a common sidewall of the first successive gutter 36 and the second successive gutter 38. It will again be clear that for each liquid level hi it holds that the magnitude represented in Fig. 4.2b of the surface of an inlet cross section of the liquid stream 60 through the first successive inlet, which inlet cross section lies in a plane of the first successive inlet, is a predetermined factor (in this example again the factor 10) smaller than the magnitude of the surface of an outlet cross section of the liquid stream 64 through the basic outlet, which outlet cross section lies in a plane of the basic outlet (see Fig. 4.2a), so that the flow through the first successive gutter is a predetermined factor smaller than the flow through the basic gutter. Differently formulated, it holds moreover that the first successive inlet and the basic outlet have such a shape that for each possible liquid level in the basic gutter it holds that, in use, the total length 11 of the surface of the liquid in a direction that lies in a plane of the first successive inlet is a predetermined factor (in this example ten) smaller than the total length 12 of the surface of the liquid in a direction that lies in a plane of the basic outlet so that the flow through the first successive gutter is the predetermined factor smaller than the flow of the basic gutter. Again, this holds for every height hi. It is noted that in this example it holds that 11+13=12 for each value of hi.

For the sake of completeness, it is noted that a cross section of the basic gutter can also take other particular shapes, as shown in Fig. 4.3. Here, it holds for a height of the liquid level hi that the magnitude of the respective surface is determined by the sum of two surfaces as indicated in hatching and is determined by the magnitude of one surface at a height h2 as indicated in hatching. Furthermore, it holds at the height hi that the effective length 12 consists of two partial lengths 12.1 and 12.2, while the effective length 12 at the height h2 consists of one length. Such variants are each understood to be within the framework of the invention.

Returning now to the sample taking apparatus according to Fig. Ia, it holds furthermore that this sample taking apparatus is provided with the second liquid stream divider 32. The second liquid stream divider 32 is provided with a basic gutter 34.2, a first successive gutter 36.2 and a second successive gutter 38.2. Here, the first successive gutter 36 of the first liquid stream divider opens into the basic gutter 334.2 of the second liquid stream divider. The first liquid stream 36 of the first divider 30 forms the basic liquid stream 64.2 of the second divider 34.2. The second liquid stream . divider works according to the same principle as the first liquid stream divider. The second liquid stream divider is furthermore provided with a basic outlet 40.2, a first successive inlet 42.2 and a second successive inlet 44.2. Again, it holds that the basic outlet 40.2 is situated opposite the first successive inlet 42.2 and opposite the second successive inlet 44.2. The basic gutter 34.2 is again provided with a bottom 46.2 and upstanding sidewalls 48.2 and 50.2. Furthermore, it holds that the first successive gutter is provided with an upstanding sidewall 54.2 and an upstanding sidewall 56.2 as well as a bottom 52.2. The second successive gutter is provided with the upstanding sidewall 60.2 and an upstanding sidewall 62.2 and a bottom

58.2. Again, it holds that the basic outlet 40.2 is bounded by the bottom and the upstanding sidewalls of the basic gutter 34.2. Furthermore, the first successive inlet 42.2 is bounded by the bottom and the upstanding sidewalls of the first successive gutter 36.2. Entirely analogously, the second successive inlet is bounded by the upstanding sidewalls and the bottom of the second successive gutter 38.2 and the upstanding sidewalls 56.2 and 60.2 are executed as one and the same sidewall.

Further, it holds that distance d2 between the upstanding sidewalls of the first successive gutter 36.2 is a predetermined factor, in this case a factor ten, smaller than the distance D2 between the upstanding sidewalls 48.2 and 50.2 of the basic gutter 34.2. The result is therefore that the flow of the basic liquid stream 64.2 through the basic gutter 34.2 is a factor ten greater than the flow of the first liquid stream 66.2 through the first successive gutter 36.2 of the second divider. It will be clear that it holds moreover that the flow of the basic liquid stream 64.2 is a factor ten smaller than the flow of the basic liquid stream 64 through the basic gutter 34. This, in turn, means that the flow of the first liquid stream 66.2 of the second divider is a factor 10*10= 100 smaller than the basic liquid stream of the first divider. In the example it holds also that the second liquid stream 68 of the first liquid stream divider is merged with the second liquid stream 68.2 of the second liquid stream divider and jointly form a sub liquid stream 70. Thus the sample taking apparatus 1 obtains a sample liquid stream 66.2 from a main liquid stream 64 with the flow of the sample liquid stream being a factor 100 smaller than the flow of the main liquid stream.

It holds in the example that the main liquid stream is equal to the basic liquid stream of the first liquid stream divider while the sample liquid stream is equal to the first liquid stream of the second liquid stream divider. The operation of the second liquid stream divider is entirely analogous to that as described above for the first liquid stream divider.

Of course, the second liquid stream divider can also have different embodiments as discussed in relation to the first liquid stream divider In the present exemplary embodiment, it holds that the basic gutter of the first liquid stream divider and moreover also the first and second successive gutter of the first liquid stream divider are directed at least substantially horizontally. Moreover, it holds that the basic gutter of the second liquid stream divider in this example as well as the first successive gutter and the second successive gutter of the second liquid stream divider are directed at least substantially horizontally. However, this not requisite.

For example, it is also conceivable that the first successive gutter of the second liquid stream divider is not directed horizontally. For example, also the first successive gutter of the first liquid stream divider may not be directed horizontally and, for example, downstream slope down and thus connect to a horizontally directed basic gutter of the second liquid stream divider.

It is also conceivable for at least one of the dividers that the basic gutter and the first successive gutter are not in line with each other but include an angle different from 180 degrees. It is also conceivable for at least one of the dividers that the basic gutter and the second successive gutter are not in line with each other but include an angle different from 180 degrees. Such variants are each understood to be within the framework of the invention.

In the example outlined above, it holds further that the apparatus is provided with a plurality of liquid stream dividers, wherein a first liquid stream of a first liquid stream divider of the plurality of liquid stream dividers forms the basic liquid stream of a second liquid stream divider of the plurality of liquid stream dividers. Moreover, it holds that for one of the liquid stream dividers of the plurality of liquid stream dividers that the main liquid stream is equal to the basic liquid stream and wherein for another of the plurality of liquid stream dividers it holds that a first liquid stream is equal to the sample liquid stream. It holds thus that the main milk stream 22 of the milking apparatus 8 of Fig. 3 is equal to the main liquid stream 64 of the sample taking apparatus according to Fig. Ia, which main liquid stream is equal to the basic liquid stream of the first liquid stream divider. Further, it holds that the sample milk stream 26 of the apparatus according to Fig. 3 is equal to the sample liquid stream 66.2 of the sample taking apparatus according to Fig. Ia, which stream is equal to the first liquid stream of the second liquid stream divider 32. Further, it holds that the sub milk stream 24 of Fig. 3a is equal to the sub liquid stream 70 of Fig. Ia. The housing in this example is provided with a first liquid flow path 210 which extends from the liquid supply opening 2 to the sample liquid discharge opening 6 and a second liquid flow path 212 which extends from the liquid supply opening 2 to the sub liquid discharge opening 64, wherein the first liquid flow path comprises the basic gutter and the first successive gutter of each liquid stream divider 30, 32 and wherein the second liquid flow path 212 comprises of all liquid stream dividers 30, 32 excepting one (32) the basic gutter and the first successive gutter as well as of all liquid stream dividers 30, 32 the basic gutter and the second successive gutter. Further, it holds that the liquid supply opening 2 is connected through a first fluid connection (in this example in that the liquid supply opening 2 coincides with the basic inlet of the first divider 30) with the basic inlet of one of the liquid stream dividers 30, wherein the sample liquid discharge opening 6 is connected through a second fluid connection with the first successive gutter 36.2 of another of the liquid stream dividers 32 (in this example in that the sample liquid discharge opening 6 is formed by an open end of the first successive gutter 36.2). Further, it holds that the sub liquid stream discharge opening 4 is connected through a third fluid connection with each of the second successive gutters 38, 38.2 of the liquid stream dividers 30, 32. Further, it holds, more particularly, that the liquid supply opening 2 is connected through the first fluid connection with the basic inlet 2 of the first liquid stream divider, that the sample liquid discharge opening 6 is connected through the second fluid connection with the first successive gutter 36.2 of the second liquid stream divider 32 and that the second successive gutter 38 of the first divider 32 and the second successive gutter 38.2 of the second divider 34 are connected through the third fluid connection with the sub liquid discharge opening 4.

Presently referring to Figs. 2a-2d a second possible embodiment of a sample taking apparatus 1 will be outlined that can be used in the milking apparatus 8 of Fig. 3. Here, parts corresponding to Figs. Ia and Ib are provided with a same reference numeral.

The sample taking apparatus 1 according to Fig. 2a is provided with an airtight housing 202 with a liquid supply opening 2, a liquid discharge opening 4 and a sample liquid discharge opening 6. The apparatus is furthermore provided with a first liquid stream divider 30 and a second liquid stream divider 32 whose operation is identical to that of the first liquid stream divider 30. The first liquid stream divider 30 is provided with a vertically directed basic gutter 34 which is provided with a basic inlet 2 formed by the liquid supply opening 2. Furthermore, the basic gutter is provided with a basic outlet 40. The sample taking apparatus is further provided with a first chamber 80 which is situated beneath a wall 82, in which wall 82 the basic outlet 40 is arranged, the wall 82 forming an end of the basic gutter 34. In the chamber a housing 84 is included, with an upper side 86 of the housing 84 having the shape of an oblique roof. In the ridge of the roof-shaped upper side 86 the first successive inlet 42 is arranged. A space 88 in the housing 84 contiguous to the first successive inlet 42 forms the first successive gutter 36. Furthermore, the space located in the chamber 80 but located outside the housing 84 forms the at least one second successive gutter 38. In the basic gutter 34, furthermore, liquid regulation means 90 are arranged which arrange for the liquid level in the basic outlet 40 to extend from a side 92 of the basic outlet 40 in a direction directed away from this side 92 up to a position 94 in the basic outlet 40 whose distance to the side 90 can vary with the magnitude of the flow of the liquid stream through the basic gutter 34. The side 92 of the basic outlet 40 thus forms a bottom 92 of the basic outlet because a volume of liquid in the basic outlet always extends from this bottom up to the above-mentioned point in the plane of the basic outlet while the distance between the bottom and the point can vary depending on the magnitude of the flow through the basic gutter. If the flow in the basic gutter increases, this distance will generally increase and vice versa. This distance, in this example, forms as it were a horizontal height of the liquid stream through the basic outlet. The direction of this liquid stream, however, is vertically downwards.

The liquid stream regulation means 90 of the first divider 30 is provided with at least one upstanding sidewall 96, 98, 100, 102 which extends around the basic outlet 40 of the first liquid stream divider 30 in the basic gutter 34, in a direction A of the respective divider, directed away from the basic outlet 40, against the flow direction S of the basic gutter of the divider. In the upstanding sidewall 96 of the liquid stream regulation means a first overflow opening 104 (shown striped in Figs. 2b and 2d) is arranged, with a lower edge generally sloping downwards with a decreasing magnitude of a horizontal component dx(P) of a distance from a point P of the lower edge to said side 92 of the basic outlet. Stated differently, the vertical height dz(P) of lower points P of the overflow opening decreases when the horizontal component dx(P) of distances from these points P up to said side 92 of the basic outlet 40 decreases. Between the overflow opening 104 and the upstanding sidewalls 106 of the basic gutter of the respective divider, a free space is present. The side 92 mentioned forms the bottom of the basic outlet. In the example, it holds that the basic outlet 40 of the divider is of rectangular design, with a short side 108 of the basic outlet forming the bottom 92 of the basic outlet and with a long side 110 of the basic outlet being directed substantially parallel to a plane of the overflow opening 104. Furthermore, it holds that the first successive inlet 42 of the divider is of rectangular design, with a length dl of the short side 110 of the first successive inlet being the respective factor smaller than the length D of the short side of the basic inlet of the divider 30. In the example, it holds further that in the upstanding sidewall 96, 102 of the respective divider two opposed overflow openings 104, 112 (shown striped in Fig. 2b) are arranged having at least substantially identical dimensions. So it holds for each overflow opening that it comprises a lower edge which slopes generally downwards with a decreasing magnitude of a horizontal component (dx (P) of a distance from a point P of the lower edge to said side 92 of the basic outlet and wherein between each overflow opening and the upstanding sidewalls of the basic gutter of the respective divider a free space is present.

The vertical height dz for points P of the lower edge dz with respect to the vertical height of the side 92 decreases to approximately zero for points of the lower that are located near said side 92 of the basic outlet 40. This is to say that the vertical component dz(P) of a distance from a point P of the lower edge to said side 92 is approximately equal to zero when the horizontal component dx(P) of this distance is approximately equal to zero.

The embodiment of the sample taking apparatus described up to this point works as follows. The milk stream is supplied to the liquid supply opening 2. The milk will thereby form a liquid level on top of the wall 82. The milk will thereupon flow via the overflow openings 104, 112 to the basic outlet 40. First, the milk will flow through the overflow openings 104 near the side 92 of the basic outlet. When the flow increases and when the liquid level that is on the wall 82 increases in vertical direction, this will mean that the liquid can also flow through the overflow openings 104, 112 at a position 94 (see Fig. 2d) which, viewed in direction X, is at a greater distance dx (94) from the side 92. The result is that through the basic outlet 40 a milk stream is formed which, viewed in the direction X, has a height, starting from the side 92 up to the position 94 (represented in Fig. 2c, 2d). The greater the flow, the further the position 94 will shift in a direction opposite to the direction X (see Fig. 2c and Fig. 2d). That is, the distance between the position 94 and the side 92 will increase when in the direction A, Z (see Fig. 2b) the liquid level above the wall 82 will increase, that is, when the flow of the basic liquid stream in the basic gutter will increase. Since the liquid that flows through the basic outlet flows down in a vertical direction, this liquid stream, when reaching the first successive inlet, will still have a width that corresponds to a width of the short side of the basic outlet and a height that corresponds to the horizontal distance dx(94) between the position 94 and the side 92. Because the first successive inlet 52 has a short side of a magnitude dl that is a predetermined factor smaller than the magnitude D of the short side of the basic outlet 40, the flow of the liquid stream that flows through the first successive outlet will likewise be the predetermined factor smaller than the flow that flows through the basic outlet. Thus, there flows through the first successive inlet 42 to the first successive gutter 36 a first liquid stream 64 with a flow that is the predetermined factor smaller than the flow of the basic liquid stream that flows through the basic outlet 40. The remainder of the liquid stream, the second liquid stream, flows via the second successive gutter 38 to the sample liquid discharge opening 6. When the flow in the basic gutter increases, the height dx(94) will increase, but it will continue to hold that the flow of the first successive stream is the predetermined factor smaller than the flow of the basic liquid stream because the ratio between said flows is exclusively determined by the factor D/dl. In the example, it holds furthermore that the apparatus is further provided with a second divider 32 of which the basic gutter 34.2 and the first successive gutter 42.2 are vertically directed. In the basic gutter 34.2 of the second divider, liquid stream regulation means 90.2 are arranged which work and are arranged similarly to the liquid regulation means 90 of the first divider 30. The second divider 32 is provided with a chamber 80.2 having inside thereof a housing 84.2, with an upper side 86.2 of the housing of the second divider again having the shape of an oblique pointed roof, where in the ridge of the roof -shaped upper side 86.2 the first successive outlet 42.2 of the second divider is arranged. A space 88.2 in the housing 84.2 of the second divider, contiguous to the first successive inlet 36.2, forms the first successive gutter 42.2 and a space located in the chamber 80.2 but located outside the housing 84.2 forms the at least one second successive gutter 38.2.

All this is entirely analogous to what has been discussed for the first divider. The second successive gutter of the second divider also opens into the sample liquid discharge opening 6. It is to be noted here that the first liquid stream that flows through the first successive gutter of the first divider 30 is equal to the basic liquid stream for the second divider. In the example, the second divider has a predetermined factor that is equal to one- tenth. So this concerns the ratio between the magnitude of the short side of the basic outlet and the magnitude of the first successive inlet of the second divider. The respective factor of the first divider 30 is also equal to ten. The result is therefore that the flow of the milk that is supplied to the liquid supply opening 2 is a factor of one hundred greater than the flow of the milk that leaves the sample liquid discharge opening 6.

The invention is not in any way limited to the embodiments outlined above. For example, in the apparatus according to Fig. 2a the wall 82 and 82.2 may not be directed horizontally. A plane through the basic outlets then is not directed horizontally either. Furthermore, the basic outlet 40 can also have different shapes than that of a rectangle. The first successive inlet can then have a shape that corresponds to the shape of the basic outlet. Such an arrangement then works in a manner entirely analogous to that discussed with reference to Figs. 1 and 2. For the apparatus of Fig. 1, a number of possibilities have already been discussed in relation to Figs. 4.2a, 4.2b and 4.3. A variant for the apparatus according to Fig. 2a is shown in Figs. 5a- 5d, with the shape of the basic outlet being of triangular design so that the upstanding sidewall of the liquid stream regulation means 90 in fact consists of three upstanding sidewalls 96, 100 and 102. The sidewalls 96, 100 are then, again, provided with said overflow openings 104, 112. Such variants are each understood to be within the framework of the invention.

Naturally, the second divider of Fig. 1 or Fig. 2 may also be provided with a basic outlet and a successive inlet that have shapes deviating from that of the rectangle. It is also conceivable that in the apparatus of Fig. 1 or 2, instead of two dividers, three dividers are connected in series. It is also conceivable that different kinds of dividers are connected in series. For example, one of the dividers of Fig. Ia could be combined with one of the dividers of Fig. 2a. Also, it is possible that the pump 16 is placed between the milk claw 12 and the sample taking apparatus. For the purpose of milking, a pulsating vacuum is then created in the milk claw and the pump supplies the milk to the liquid supply opening 2 of the sample taking apparatus 1, while the operation of the sample taking apparatus 1 remains the same as described above. As it is then not necessary to create a vacuum in the milk claw with the pump 16 via the sample taking apparatus 1, the housing 202 of the apparatus does not need to be made airtight. In Fig. Ia, for example, the cover 200 can then be omitted. Such variants too are each understood to be within the framework of the invention.

Claims

1. A sample taking apparatus for obtaining a sample liquid stream from a main liquid stream wherein the sample liquid stream is a predetermined percentage of the main liquid stream, characterized in that the sample taking apparatus is provided with at least one liquid stream divider for dividing a basic liquid stream into a first liquid stream and at least a second liquid stream, wherein the liquid stream divider is provided with a basic gutter provided with a basic inlet and a basic outlet, a first successive gutter and at least a second successive gutter wherein the first successive gutter is provided with a first successive inlet and the at least one second successive gutter is provided with a second successive inlet, wherein the basic gutter opens via the basic outlet into the first successive gutter via the first successive inlet and into the at least one second successive gutter via the second successive inlet wherein the basic outlet and the first successive inlet are situated opposite each other and wherein the divider is so arranged that the liquid level in the basic outlet and the liquid level in the first successive inlet are equal to each other, wherein these liquid levels can vary depending on the magnitude of the flow of the basic liquid stream, wherein the first successive inlet and the basic outlet have a shape such that, in use, for each possible liquid flow in the basic gutter, it holds that the magnitude of the surface of an inlet cross section of the liquid stream through the first successive inlet, which inlet cross section lies in a plane of the first successive inlet, is a predetermined factor smaller than the magnitude of the surface of an outlet cross section of the liquid stream through the basic outlet, which outlet cross section lies in a plane of the basic outlet, so that the flow of the first liquid stream in the first successive gutter is the predetermined factor smaller than the flow of the basic liquid stream in the basic gutter.

2. A sample taking apparatus, possibly according to claim 1, for obtaining a sample liquid stream from a main liquid stream wherein the sample liquid stream is a predetermined percentage of the main liquid stream, characterized in that the sample taking apparatus is provided with at least one liquid stream divider for dividing a basic liquid stream into a first liquid stream and at least a second liquid stream, wherein the liquid stream divider is provided with a basic gutter provided with a basic inlet and a basic outlet, a first successive gutter and at least a second successive gutter wherein the first successive gutter is provided with a first successive inlet and the at least one second successive gutter is provided with a second successive inlet, wherein the basic gutter opens into the first successive gutter and into the at least one second successive gutter, wherein the basic outlet and the first successive inlet are situated opposite each other and wherein the divider is so arranged that the liquid level in the basic outlet and the liquid level in the first successive inlet are equal to each other, wherein these liquid levels can vary depending on the magnitude of the flow of the basic liquid stream, wherein the first successive inlet and the basic outlet have a shape such that for each possible liquid flow in the basic gutter, it holds that, in use, the total length of the surface of the liquid in a direction that lies in a plane of the first successive inlet, is a predetermined factor smaller than the total length of the surface of the liquid in a direction that lies in a plane of the basic outlet, so that the flow of the first liquid stream in the first successive gutter is the predetermined factor smaller than the flow of the basic liquid stream in the basic gutter.

3. A sample taking apparatus according to claim 1 or 2, characterized in that the liquid levels in the basic gutter, basic outlet, the first successive inlet, and the first successive gutter, as well as in particular in the at least one second successive inlet and the at least one second successive gutter can vary depending on the magnitude of the flow of the liquid that flows through the basic gutter wherein in particular the liquid levels in the basic outlet and the first successive inlet in a direction that, in use, is perpendicular to a flow direction of the liquid through the basic gutter can vary depending on the magnitude of the flow of the liquid that flows through the basic gutter.

4. A sample taking apparatus according to any one of the preceding claims, characterized in that, in use, the inlet cross section is directed perpendicular to a direction of the liquid stream through the successive inlet and/or that the outlet cross section is directed perpendicular to the flow direction of the liquid through the basic outlet.

5. A sample taking apparatus according to any one of the preceding claims, characterized in that the basic outlet is provided with two opposite outlet sidewalls and possibly a flat bottom and the first successive inlet is provided with two opposite successive inlet sidewalls and possibly a flat bottom wherein for each liquid level in the basic gutter it holds that the distance between the successive inlet sidewalls measured along a surface of the liquid in the first successive inlet is the predetermined factor smaller than the distance between the basic outlet sidewalls measured along a surface of the liquid in the basic outlet.

6. A sample taking apparatus according to any one of the preceding claims, characterized in that the apparatus is so dimensioned that, in use, at a predetermined maximum flow of the main liquid stream the basic gutter, the basic outlet and the first successive inlet are not completely filled with the liquid and that preferably at the predetermined maximum flow also the first successive gutter, the at least one second successive inlet and the at least one second successive gutter are not completely filled.

7. A sample taking apparatus according to any one of the preceding claims, characterized in that the basic liquid stream is equal to the main liquid stream and that the first liquid stream is equal to the sample liquid stream so that the predetermined percentage is equal to the predetermined factor.

8. A sample taking apparatus according to any one of claims 1-6, characterized in that the apparatus is provided with a plurality of liquid stream dividers wherein a first liquid stream of a first liquid stream divider of the plurality of liquid stream dividers forms the basic liquid stream of a second liquid stream divider of the plurality of liquid stream dividers so that the predetermined percentage is equal to the product of the predetermined factor of the liquid stream divider.

9. A sample taking apparatus according to claim 8, characterized in that for one of the liquid stream dividers of the plurality of liquid stream dividers it holds that the main liquid stream is equal to the basic liquid stream and wherein for another of the plurality of liquid stream dividers it holds that a first liquid stream is equal to the sample liquid stream so that the predetermined percentage is equal to the product of the predetermined factor of the liquid stream divider.

10. A sample taking apparatus according to any one of the preceding claims 8 or 9, characterized in that the apparatus is provided with merging means for combining into a sub main liquid stream all second liquid streams of all liquid stream dividers of the plurality of liquid stream dividers.

11. A sample taking apparatus according to any one of the preceding claims, characterized in that the basic gutter of the at least one liquid stream divider is provided with a bottom and two upstanding sidewalls which run at least substantially parallel to each other wherein the basic outlet is bounded by the bottom and the upstanding sidewalls of the basic gutter and the first successive gutter of the at least one liquid stream divider is provided with a bottom and two upstanding sidewalls which run at least substantially parallel to each other wherein the first successive inlet is bounded by the bottom and the upstanding sidewalls of the first successive gutter and wherein a distance between the upstanding sidewalls of the first successive gutter is the predetermined factor smaller than the distance between the upstanding sidewalls of the basic gutter.

12. A sample taking apparatus according to claim 11, characterized in that the second successive gutter of the at least one liquid stream divider is provided with a bottom and two upstanding sidewalls which run at least substantially parallel to each other wherein the second successive inlet is bounded by the bottom and the upstanding sidewalls of the second successive gutter.

13. A sample taking apparatus according to claim 12, characterized in that the first successive gutter and the second successive gutter have a common upstanding sidewall.

14. A sample taking apparatus according to claim 11, 12 or 13, characterized in that the basic gutter is at least substantially horizontally directed and that possibly the first successive gutter is at least substantially horizontally directed.

15. A sample taking apparatus at least according to claim 13, characterized in that the second successive gutter is at least substantially horizontally directed.

16. A sample taking apparatus according to any one of the preceding claims 11-15 and according to any one of claims 8-10, characterized in that the sample taking apparatus is further provided with a second divider, wherein the basic gutter of the second liquid stream divider is provided with a bottom and two upstanding sidewalk which run at least substantially parallel to each other wherein the basic outlet of the second divider is bounded by the bottom and the upstanding sidewalls of the basic gutter of the second divider, and the first successive gutter of the second liquid stream divider is provided with a bottom and two upstanding sidewalls which run at least substantially parallel to each other wherein the first successive inlet of the second divider is bounded by the bottom and the upstanding sidewalls of the first successive gutter of the second divider and wherein a distance between the upstanding sidewalls of the first successive gutter of the second divider is the predetermined factor of the second divider smaller than the distance between the upstanding sidewalls of the basic gutter of the second divider and wherein the first successive gutter of the first divider opens into the basic gutter of the second divider.

17. A sample taking apparatus according to claim 16, characterized in that the second successive gutter of the second liquid stream divider is provided with a bottom and two upstanding sidewalls which run at least substantially parallel to each other wherein the second successive inlet of the second divider is bounded by the bottom and the upstanding sidewalls of the second successive gutter of the second divider.

18. A sample taking apparatus according to claim 17, characterized in that the first successive gutter of the second divider and the second successive gutter of the second divider have a common upstanding sidewall.

19. A sample taking apparatus according to claim 16, 17 or 18, characterized in that the basic gutter of the second divider is at least substantially horizontally directed and that possibly the first successive gutter of the second divider is at least substantially horizontally directed.

20. A sample taking apparatus at least according to claim 19, characterized in that the second successive gutter of the second divider is at least substantially horizontally directed.

21. A sample taking apparatus according to any one of claims 1-10, characterized in that the basic gutter and the first successive gutter extend at least substantially in vertical direction, wherein in particular a plane through the basic outlet is horizontally directed.

22. A sample taking apparatus according to claim 21, characterized in that in the basic gutter liquid stream regulation means are arranged which provide that the liquid level in the basic outlet extends from a side of the basic outlet in a direction directed away from this side to a position in the basic outlet, wherein a distance from the position in the basic outlet up to said side can vary with the magnitude of the flow of the basic liquid stream in the basic gutter.

23. A sample taking apparatus according to claims 5 and 22, characterized in that the side of the basic outlet is formed by the bottom of the basic outlet.

24. A sample taking apparatus according to any one of claims 21-23, characterized in that the divider is provided with a chamber having included therein a housing wherein an upper side of the housing has the shape of an oblique pointed roof, wherein along the ridge of the roof-shaped upper side the first successive outlet is arranged, wherein a space in the housing that is contiguous to the first successive outlet forms the first successive gutter and the space located in the chamber though outside the housing forms the at least one second successive gutter.

25. A sample taking apparatus according to any one of claims 8-10 and according to any one of claims 21-24, characterized in that the sample apparatus is further provided with a second divider of which the basic gutter and the first successive gutter vertically directed, wherein in the basic gutter of the second divider liquid stream regulation means are arranged which provide that the liquid level in the basic outlet of the second divider extends from a side of this basic outlet in a direction directed away from this side up to a position whose distance up to said side can vary with the magnitude of the flow of the basic liquid stream in the basic gutter of the second divider.

26. A sample taking apparatus according to claims 5 and 25, characterized in that the side of the basic outlet of the second divider is formed by the bottom of the basic outlet of the second divider.

27. A sample taking apparatus according to any one of claims 24-26, characterized in that the second divider is provided with a chamber having inside thereof a housing wherein an upper side of the housing of the second divider has the shape of an oblique pointed roof, wherein along the ridge of the roof-shaped upper side the first successive outlet of the second divider is arranged and wherein a space in the housing of the second divider forms the first successive gutter of the second divider and the space located in the housing of the second divider though outside the chamber of the second divider forms the at least one second successive gutter of the second divider.

28. A sample taking apparatus according to any one of claims 22 or 25, characterized in that for the liquid stream regulation means of at least one of the dividers or for the liquid stream regulation means of each divider it holds that it is provided with at least one upstanding sidewall that extends around the basic outlet of the respective divider, from the basic outlet of the respective divider in a direction directed away from a plane through the basic outlet of the respective divider against a flow direction of the basic gutter of the respective divider, in the basic gutter of the respective divider, wherein in the upstanding sidewall of the liquid stream regulation means of the respective divider at least one overflow opening is arranged with a lower edge sloping generally downwards with a decreasing magnitude of a horizontal component of a distance from a point of the lower edge to said side 92 of the basic outlet and wherein between the overflow opening and the upstanding sidewalls of the basic gutter of the respective divider a free space is present.

29. A sample taking apparatus according to claims 5 and 28, characterized in that said side of the respective divider forms said bottom of the basic outlet of the respective divider.

30. A sample taking apparatus according to claim 29, characterized in that the basic outlet of the respective divider is of rectangular design, wherein a short side of the basic outlet of the respective divider forms said bottom of the respective divider and wherein a long side of the basic outlet is directed at least substantially parallel to a plane in which lies the overflow opening of the respective divider.

31. A sample taking apparatus according to claim 30, characterized in that the first successive inlet of the respective divider is of rectangular design, wherein a short side of the first successive inlet is said predetermined factor smaller than the short side of the basic inlet of the respective divider.

32. A sample taking apparatus according to any one of claims 28-31, characterized in that in the upstanding sidewall of the respective divider two opposite overflow openings are provided with at least substantially identical dimensions, wherein it holds for each overflow opening that it comprises a lower edge which slopes generally downwards with a decreasing magnitude of a horizontal component of a distance of a point of the lower edge up to said side 92 of the basic outlet and wherein between each overflow opening and the upstanding side walls of the basic gutter of the respective divider a free space is present.

33. A sample taking apparatus according to any one of claims 28-32, characterized in that the vertical height for points of the lower edge with respect to the vertical height of said side 92 decreases to approximately zero for points of the lower edge that are located near said side 92 of the basic outlet 40.

34. A sample taking apparatus according to any one of claims 28-33, characterized in that a part of the upstanding sidewall of the liquid stream regulation means of the respective divider is formed by a part of the upstanding sidewalls of the basic gutter of the respective divider.

35. A sample taking apparatus according to any one of the preceding claims, characterized in that the apparatus is provided with a housing with a liquid supply opening to which, in use, the main liquid stream is supplied, a sample liquid discharge opening which, in use, delivers the sample liquid stream and a sub liquid discharge opening which in use delivers a sub liquid stream that is equal to the main liquid stream exclusive of the sample liquid stream, wherein the at least one liquid stream divider is situated in the housing.

36. A sample taking apparatus according to claim 35, characterized in that the housing with the exception of the liquid supply opening, the sub liquid discharge opening and the sample liquid discharge opening is of airtight design.

37. A sample taking apparatus according to claim 35 or 36, characterized in that the housing is provided with a first liquid flow path which extends from the liquid supply opening to the sample liquid discharge opening and a second liquid flow path which extends from the liquid supply opening to the sub liquid discharge opening wherein the first liquid flow path comprises the basic gutter and the first successive gutter of each liquid stream divider and wherein the second liquid flow path comprises of all liquid stream dividers but one, the basic gutter and the first successive gutter as well as of all liquid stream dividers the basic gutter and the second successive gutter.

38. A sample taking apparatus according to any one of claims 8-10 and according to any one of claims 35, 36 or 37, characterized in that the liquid supply opening is connected through a first fluid connection with the basic inlet of one of the liquid stream dividers, wherein the sample liquid discharge opening is connected through a second fluid connection with the first successive gutter of another of the liquid stream dividers and that the sub liquid discharge opening is connected through a third fluid connection with each of the second successive gutters of the liquid stream dividers.

39. A sample taking apparatus according to claims 16 or 25 and according to claim 38, characterized in that the liquid supply opening is connected through the first fluid connection with the basic inlet of the first liquid stream divider, that the sample liquid discharge opening is connected through the second fluid connection with the first successive gutter of the second liquid stream divider and that the second successive gutter of the first divider and the second successive gutter of the second divider is connected via the third fluid connection with the sub liquid discharge opening.

40. A sample taking apparatus according to any one of the preceding claims, characterized in that the sample taking apparatus is designed as a milk sample taking apparatus.

41. A milking apparatus for milking animals, in particular cows, provided with means for creating a reduced pressure in a milk line of the apparatus for milking the animals and generating a main milk stream coming from a milked cow, characterized in that the milking apparatus is provided with a sample taking apparatus according to any one of the preceding claims for taking a sample milk stream from the main milk stream.

42. A milking apparatus according to claim 41, characterized in that the main liquid stream is equal to the main milk stream and the sample liquid stream is equal to the sample milk stream.