ES2361890B1 - DRAIN FOR COLLECTION OF RAIN WATER AND COLLECTION PROCEDURE AND MANAGEMENT OF RAIN WATER EMPLOYING SUCH SUCTION. - Google Patents

Abstract

Sump for rainwater collection and rainwater collection and management procedure used by said sump. # The sump is characterized by the fact that it comprises a first water outlet (5) connected to a conduit (7) of a sewage sanitation network, and by the fact that it comprises means (9,14) to limit the flow of water evacuated through said duct (7), said cassette (2) being designed to allow the accumulation in its inside a predetermined volume of said first fraction of water, said volume of accumulated water being susceptible to being evacuated through said conduit (7) for treatment without overloading said sanitation network. Proper management of contaminated water in the entire sanitation network is guaranteed.

Description

Sump for rainwater collection and rainwater collection and management procedure used by said sink.

The present invention relates to a sump for the collection of rainwater from the roadway and a method for the collection and management of rainwater used by said sump. Background of the invention

The first fraction of rainwater collected by sumps located on public roads is usually a water contaminated with heavy elements, fat and solids in suspension, which needs to be treated to avoid contamination of public channels.

At present, in order to ensure the separation and treatment of said first fraction of rainwater, separation systems are used such as water retention tanks or others always disposed at intermediate points or at the end of the sanitation network.

The aforementioned deposits store the first contaminated fraction of rainwater from different sinks, so they are usually large, which implies a very high construction and maintenance cost.

On the other hand, these deposits are very inefficient in the management of said first contaminated fraction of rainwater. This is due to the fact that, being located at intermediate points, or at the end of the sanitation network, the different transit times of the water within the network make it difficult to avoid mixing clean water fractions with water fractions. of contaminated rain inside.

As an alternative to the aforementioned deposits, devices have been developed for the collection and separation at source of the contaminated fraction of rainwater.

Patents JP200815974 and US200616925 describe two of said collection and separation devices at source of the contaminated fraction of the rainwater, in which the separated contaminated water is filtered into the subsoil.

Specifically, the JP200815974 patent refers to a device or sump that includes a casket with an upper opening for the entry of rainwater from the roadway, a first outlet for the evacuation of a first fraction of water and a second outlet located at a higher height, for the evacuation of the fraction of rainwater not evacuated by the first exit.

In the sump of the mentioned patent, the first fraction of rainwater that is contaminated, is separated at source and filtered into the subsoil, through said first outlet, while the remaining clean water fraction is evacuated through the second outlet .

However, this sink has the disadvantage that the fraction of contaminated rainwater that separates is lost in the subsoil, which in addition to a loss of water, entails contamination of the soil itself with the consequent risks that this entails.

There are no known sinks or collection and separation devices at the source of the rainwater that contemplate the evacuation of the fraction of the contaminated rainwater for its subsequent treatment and recovery in the sanitation network.

Description of the invention

The objective of the present invention is to solve the aforementioned drawbacks, developing a sump for rainwater collection and a rainwater collection and management procedure that uses said sump, which allow the collection and separation at source of the contaminated fraction of rainwater for subsequent treatment and recovery in the sanitation network, with good management efficiency.

In accordance with this objective, according to a first aspect, the present invention provides a sump for the collection of rainwater from the roadway comprising a casket that includes an upper opening for the entry of rainwater from said roadway, a first exit for the evacuation of a first fraction of rain water, and a second exit located at a higher height with respect to said first exit for the evacuation of the fraction of rain water not evacuated by said first exit, which is characterized by the the fact that said first outlet is connected to a conduit of a wastewater sanitation network, and by the fact that said sump comprises means to limit the flow of water evacuated through said conduit, said cassette being designed to allow accumulation within a predetermined volume of said first fraction of water, said volume of water being susceptible to being eva curd through said conduit for treatment without overloading said sanitation network.

In the sump of the present invention the first contaminated fraction of rainwater is separated at source, stored in the casket, and evacuated to the conduit of the sewage network, through said first outlet. This ensures a very efficient and optimal management of the fraction of contaminated rainwater, ensuring its subsequent treatment in the network at all times.

In addition, the sump of the present invention comprises means for limiting the flow of water evacuated through the wastewater conduit. Thanks to this, it is possible to ensure that the flow of water evacuated through said duct is lower than a predetermined value so as not to overload the existing sewage network. In this way, proper management of contaminated water in the entire sanitation network is guaranteed.

Another advantage provided by the sump of the present invention lies in the fact that, in addition to preventing the loss of a fraction of rainwater in the subsoil, it makes it possible to provide an additional water flow to the sanitation network of wastewater which is particularly interesting in sewage networks of a separative type. In fact, in this type of networks an additional supply of water to the wastewater pipes facilitates the cleaning of said pipes, which results in an improvement in the maintenance of the network.

Preferably, said means for limiting the flow of evacuated water comprise means for limiting the water passage section of said first outlet.

In this way, it is possible to limit the flow of evacuated water without modifying the diameter of the conduit connected to said first outlet, so that the sump can be conveniently installed in any existing sanitation network.

Again preferably, said means for limiting the flow further comprise means for closing said passage section when the water accumulated in said cassette reaches the level of said second water outlet.

The aforementioned closing means prevent that, at certain times, when the sewerage network is very loaded, the contaminated fraction of accumulated water is evacuated through the wastewater pipe, being then stored or con fi rmed in the sump itself.

This is especially interesting in unit-type networks, in which all rainwater goes to a unit collector downstream. In this type of networks, once the first contaminated fraction of rainwater is stored, the water outlet connected to the sewage line can be kept closed until the end of the rain episode. At this time, once it is considered that the unit network has recovered its usual flow, then the discharge of the accumulated water in the sump cassette will be activated.

Advantageously, said closing means comprise a closing mechanism operable by a buoy when said water reaches the level of said second outlet.

According to a preferred embodiment, said sump comprises a plate arranged inclined on said first outlet for the collection and pouring of the incoming water to the opposite side of the casket in which said first outlet is located, said plate defining a lower accumulation enclosure of said First fraction of water.

The mentioned plate facilitates efficient collection and separation of the first fraction of contaminated water through the wastewater outlet.

Advantageously, said plate comprises at one of its ends an articulated plate portion capable of oscillating when the water level rises or falls to close or open said water accumulation enclosure that determines the plate itself.

In this way, the fraction of contaminated water stored in the enclosure can be con fi rmed, allowing all incoming clean water to be evacuated through the second outlet located at a higher height on said plate.

Preferably, said sump comprises means for fi ltering the water before its exit through said duct.

The fi lter prevents solids greater than a certain size from causing seals or blockages of the flow limiting mechanisms of the wastewater supply.

Advantageously, said means for fi ltering water comprise a vertical filtering wall disposed transversely inside said enclosure, said wall defining a filtering dividing surface that allows the pouring of the filtered water to the side of the casket in which said first outlet is located.

This configuration allows the filtering of a significant volume of water and, with it, a rapid and correct evacuation of the water stored in said enclosure through the wastewater conduit.

Optionally, said sump comprises plates of fl ectors arranged longitudinally inside said enclosure to drive said water towards the side of the casket in which said first outlet is located.

The aforementioned plates of fl ectors paci fi ne the incoming water fl ow to the enclosure and lead it to the water outlet connected to the sewage conduit.

When the volume of water stored in the enclosure is agreed, the sedimentation of suspended solids that can carry the water is favored. These solids, as well as those that the aforementioned fi lter can retain, may be removed by any operator through the upper opening of the casket.

According to a second aspect, the present invention provides a method for collecting rainwater using the claimed sump, which comprises the steps of;

a) collect rainwater through the upper opening of said casket,

b) bi) if the incoming rain flow is less than the scrap flow of said first water outlet, evacuate said incoming rain flow through said conduit of the sewage network, the value of the evacuated water flow being a predetermined value for not overloading said sewage network, or

bii) if the incoming rain flow is greater than the scrap flow of said first water outlet, accumulate a predetermined volume of said first fraction of water inside said cassette, while a fraction of the incoming water flow is evacuated by said wastewater conduit, the value of the evacuated water flow being a predetermined value so as not to overload said wastewater sanitation network.

The rainwater collection process of the present invention enables a very efficient and safe management of the contaminated fraction of the rainwater.

In fact, regardless of the flow of incoming rainwater, in the process of the present invention the first contaminated fraction of rainwater can always be separated and finally evacuated through the wastewater pipe for subsequent treatment in the network of sanitation In addition, the evacuation of said first fraction of water is always carried out without overloading said sewerage network, whether new or existing.

According to a first embodiment, if the incoming rain flow is higher than the scrap flow of the first exit and the sanitation network is separative or there is no overload in the sewage network, after step bii), the procedure it comprises step ci), in which the volume of accumulated water is evacuated through said sewage conduit, the value of the evacuated water flow being a predetermined value so as not to overload said sewerage network.

In a separative type network, sewage collectors are usually oversized in relation to the flow of wastewater that they must regularly transport. For this reason, the additional flow of water provided by the drain pipe of the sump does not distort or overload said collector. On the contrary, said additional flow has a very positive cleaning effect that facilitates the maintenance of the network.

According to another second embodiment, if the incoming rain flow is higher than the scrap flow of the first outlet of the sump and the sanitation network is of the unit type or there is an overload in the sewage network, after step bii), the The method includes step cii) in which, when the water accumulated in the cassette reaches the second outlet, the water passage section of said first outlet is closed, meanwhile all the incoming rain flow through said second is evacuated. exit.

In a unitary type network, in which the waste and rain collectors join downstream, to ensure the correct treatment of the additional water flow provided by the wastewater pipe, it will be very appropriate to close the drain of wastewater from the sump , keeping the fraction of contaminated water inside the cabinet confidently until the rain episode ends.

Advantageously, in this unit-type network, after stage cii), the process comprises stage d) in which at the end of the rainy episode, when the sewerage network has recovered its usual scrapping flow, the section is opened of passage of said first outlet to evacuate the volume of water accumulated through said duct, the value of the evacuated water flow being a predetermined value so as not to overload said sanitation network.

This ensures the correct management of the fraction of contaminated water for subsequent treatment also in the sewage network. Brief description of the drawings

For a better understanding of how much has been exposed, some drawings are attached in which, schematically and only by way of non-limiting example, two practical cases of realization are represented.

In these drawings,

Figures 1 to 3 show, respectively, a plan section, a cross section and a longitudinal section, of a first embodiment of the sump of the present invention.

Figures 4 to 6 show, respectively, three other sections of a second embodiment of the sump of the present invention.

Figure 7 shows a perspective view of the second embodiment of the sump. Description of two preferred embodiments

The sump 1 of the present invention comprises a casing 2 that includes an upper wall 3 with an opening 3a provided with a fence 4 for the entry of rainwater from the roadway. The same box 2 has a first lower outlet 5 for the evacuation of a first fraction of water, and a second outlet 6 located at a higher height with respect to said first outlet 5, for the evacuation of the fraction of rainwater not evacuated by said first exit 5.

The first outlet 5 is connected to a wastewater conduit 7 of a sanitation network, while the second outlet 6 is connected to another stormwater conduit 8 of the same sanitation network.

As mentioned in the description of the invention, the aforementioned casket 2 is designed with a sufficient useful volume to allow the storage or accumulation within it of a predetermined volume of water corresponding to a first contaminated fraction of the rainwater. In the described embodiments, said useful volume of the case 2 has been designed by estimating that the first fraction of contaminated rainwater corresponds to the first two liters of water per square meter collected by the sump.

The water accumulated in the cassette 2 is separated and evacuated by the first outlet 5 to the wastewater conduit 7 for later treatment in the sanitation network.

The flow of water evacuated through said duct 7 has been limited to a predetermined value so as not to overload the sewage network. To this end, in both embodiments, an enclosure with a horizontal and vertical wall 9 with an outlet orifice 5 that limits the passage section connected to the wastewater conduit 7 has been provided at the base of the case 2.

As can be seen in the cross-sectional and longitudinal sections that show the fi gures of both embodiments, the inside of the case 2 is provided with an iron 10 arranged inclined on the first outlet 5, for the collection of the incoming water towards the opposite side of the box 2 in which the first outlet 5 is located. The said plate 10 defines a lower accumulation enclosure 11 of the first contaminated fraction of rainwater. Said enclosure 11 is closed or opened for the entry of water, through a portion of oscillating plate 10a.

Inside the enclosure 11, a vertical fi ltrating wall 12, aligned to the vertical wall 9, which prevents the passage of passage of the first exit 5, is mentioned transversely. The said wall 12 defines a filtering dividing surface that allows the pouring of the water fi ltered to the side of the box 2 in which the first outlet 5 is located.

In both embodiments, in order to drive the incoming rainwater to the fi ltering wall 12 that pours to the side of the outlet 5 connected to the wastewater duct 7, a plurality of float plates 13 are provided inside the enclosure 11.

Figures 1 to 3 correspond to a first embodiment of the sump of the present invention in which the control of the flow of water evacuated through the wastewater conduit 7 is carried out only by limiting the passage section of the first lower outlet 5.

Figures4a7 correspond to a second embodiment of the sump which is provided with a closing mechanism 14 of the passage section of the first outlet 5, operable by a buoy 14a when the water reaches the level of the second outlet

7.

As mentioned in the description of the invention, the sump of this second embodiment can be very useful for unitary type networks, since it allows to confirm the fraction of contaminated water inside the case 2 until moments later to end the rain episode, when the flow of the unit collector is once again the usual one to guarantee the correct treatment of the water.

The procedure for collecting rainwater by means of the claimed sump is described below.

According to a first assumption, if the incoming rain flow is less than the scrap flow of the first outlet 5, the whole fraction of rain entering the sump 1 through the opening 3a is evacuated through the wastewater conduit 7, the evacuated flow value being always lower than a predetermined value so as not to overload the sanitation network, for example of a value between 1.5 l / s and 2 l / s.

According to a second assumption, if the incoming rain flow is greater than the scrap flow of the first exit 5, the enclosure 11 of the box 2 is filled with the first contaminated fraction of rain water. Once said enclosure 11 is filled, there are two management options depending on the load or type of waste network to which the sump 1 is connected.

In the case of being connected to a separative type network, or when there is no risk of overloading of the residual network, the volume of contaminated water in the enclosure 11 will be evacuated through the duct 7, without exceeding the dismantled flow rate .

As the water in the enclosure 11 is discharged, clean water will enter the enclosure 11 which will also be evacuated. However, since the value of the evacuated flow has been set so as not to overload the waste network, the evacuation can be carried out without problems, the excess of water that cannot swallow the first outlet 5 by the second connected outlet 6 being swallowed to the rainwater collector 8.

If the sump 1 is connected to a unit type network, or when there is a risk of overloading the waste network, the volume of contaminated water in the enclosure 11 may be con fi ned until the end of the rain episode. At this time, when the water no longer reaches the level of the second outlet 7, and the sanitation network has recovered its usual scrapping flow, the passage section of the first outlet 5 will be opened to allow the evacuation of contaminated water to the duct 7.

As previously mentioned, the claimed procedure enables the optimal and effective management of the first contaminated fraction of the rainwater, ensuring its subsequent treatment in the wastewater sanitation network.

Although a specific embodiment of the present invention has been described and represented, it is clear that the person skilled in the art may introduce variants and modifications, or substitute the details for technically equivalent ones, without departing from the scope of protection defined by the claims. attached.

Claims (13)

1. Sump (1) for the collection of rainwater from the roadway, comprising a cassette (2) that includes an upper opening (3a) for the entry of rainwater from said roadway, a first outlet (5) for the evacuation of a first fraction of rainwater, and a second outlet (6) located at a higher height with respect to said first outlet (5), for the evacuation of the fraction of rainwater not evacuated by said first outlet (5), characterized by the fact that said first outlet (5) is connected to a conduit (7) of a wastewater sanitation network, and by the fact that said sump (1) comprises means (9, 14 ) to limit the flow of water evacuated through said conduit (7), said cassette (2) being designed to allow accumulation within a predetermined volume of said first water fraction, said volume of accumulated water being susceptible to be evacuated through said conduit (7) for treatment without overloading said sanitation network.

2.

Sump according to claim 1, wherein said means for limiting the flow of evacuated water comprise means (9) for limiting the water passage section of said first outlet (5).

3.

Sump according to claim 2, wherein said means for limiting the flow further comprise closing means (14) of said passage section when the water accumulated in said cassette (2) reaches the level of said second outlet (6) of Water.

Four.

Sump according to claim 3, wherein said closing means comprise a closing mechanism operable by a buoy (14a) when said water reaches the level of said second outlet (6).

5.

Sump according to any of the preceding claims, comprising a plate (10) arranged inclined on said first outlet (5) for collecting and pouring the incoming water to the opposite side of the cassette (2) in which said first outlet is located (5), said plate (10) defining a lower enclosure (11) for accumulating said first fraction of water.

6.

Sump according to claim 5, wherein said plate (10) comprises at one of its ends an articulated plate portion (10a) capable of oscillating when the water level rises or falls to close or open said accumulation enclosure (11) of water that determines the iron itself (10).

7.

Sump according to any one of the preceding claims, comprising means (12) for fi ltering the water before its exit through said duct (7).

8.

Sump according to any one of claims 5 to 7, wherein said means for fi ltering water comprise a vertical fi ltering wall (12) disposed transversely inside said enclosure (11), said wall (12) defining a dividing surface

fi ltrant that allows the pouring of the filtered water next to the cassette (2) in which said first outlet (5) is located.

9.

Sump according to any one of claims 5 to 8, comprising fl ector plates (13) arranged longitudinally inside said enclosure (11) to conduct said water towards the side of the cassette (2) in which said first outlet is located ( 5).

10.

Procedure for collecting and managing rainwater using the sump according to any one of claims 1 to 9, comprising the steps of;

a) collecting rainwater through the upper opening (3a) of said cassette (2), b) bi) if the incoming rain flow is less than the scrap flow of said first water outlet (5), evacuate said incoming rain flow through said conduit (7) of the wastewater network, the value being of the evacuated water flow a predetermined value so as not to overload said sewage network, or bii) if the incoming rain flow is greater than the scrap flow of said first water outlet (5), accumulate a predetermined volume of said first fraction of water inside said cassette (2), while evacuating a fraction of the incoming water flow through said wastewater conduit (7), the value of the evacuated water flow being a predetermined value so as not to overload said wastewater sanitation network. 11. The method according to claim 10, wherein, after step bii), it comprises step c) in which; ci) if the sanitation network is of the separative type or there is no risk of overload in the sewage network, said volume of accumulated water is evacuated through said sewage duct (7), the value of the evacuated water flow being a predetermined value so as not to overload said sewer network or cii) if the sanitation network is of the unit type or there is a risk of overload in the sewage network, when the water accumulated in the cassette (2) reaches the second outlet (6), the water passage section of the said first outlet (5), meanwhile all the incoming rain flow is evacuated through said second outlet (6). 12. The method according to claim 11, wherein, after step cii), it comprises step d) in which; d) at the end of the rain episode, when the sanitation network has recovered its usual scrapping flow, the passage section of said first outlet (5) is opened to evacuate the volume of water accumulated through said duct (7) , the value of the evacuated water flow being a predetermined value so as not to overload said sanitation network. SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 200930110 SPAIN Date of submission of the application: 04.29.2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: E03F5 / 14 (2006.01) RELEVANT DOCUMENTS

Category

Documents cited Claims Affected

Y

US 2002 175 115 A1 (SEPTITECH INC) 28.11.2002, summary; paragraphs 13-22; Figures 1-4. 1-4,7,8,10-12

Y

US 5902477 A (VENA) 11.05.1999, summary; column 2, lines 35-44; figures 1,2. 1-4,7,8,10-12

TO

US 2005072738 A1 (WEIR ROBERT K) 07.04.2005, summary; paragraphs 20-22; figure 4. 1,5,6,9

TO

US 2003141230 A1 (MOKRZYCKI) 31.07.2003, summary; paragraph 4; Figure 1. one

TO

US 6015489 A (ALLEN LARRY J; ALLEN BRIDGETT L) 18.01.2000, summary; figures. one

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 10.06.2011

Examiner F. Riesco Ruiz Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 200930110 Minimum documentation sought (classification system followed by classification symbols) E03F Electronic databases consulted during the search (name of the database and, if possible, terms of search used) INVENES, EPODOC, WPI State of the Art Report Page 2/4  WRITTEN OPINION Application number: 200930110 Date of Completion of Written Opinion: 06.10.2011 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1-12 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 5,6,9 1-4,7,8,10-12 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 200930110 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

US 2002 175 115 A1 (SEPTITECH INC) 11.28.2002

D02

US 5902477 A (VENA) 11.05.1999

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The object of the invention according to independent claim 1 is a sump for the collection of rainwater comprising a casket with upper opening for the entry of water, a first outlet for the evacuation of the first fraction of rain, and a second outlet , at a higher height, to evacuate the remaining water. The first outlet is connected to a conduit of a sanitation network and has means to limit the flow rate evacuated through said conduit, allowing the cassette to accumulate in its interior a volume of the first fraction of water, which can then be evacuated to through the conduit for treatment, without overloading the network. It is also the object of the invention, according to independent claim 10, a method for collecting rainwater using the previous sump, comprising the steps of a) capturing the water through the upper opening, bi) if the flow rate is lower at the drain flow of the first outlet, evacuate through it, this flow being less than a predetermined value, and, bii) if the flow is greater than the drain flow of the first outlet, accumulate one part and evacuate another, this flow being less than a default value. The inclusion of a mechanism in the sump allows the first fraction of rain to be evacuated for treatment and recovery, instead of losing it in the subsoil. Document D1 is considered the state of the art closest to the technical object of claims 1 and 10 of the application. Document D1 discloses a sump for the collection of rainwater comprising a casket with an upper opening for the entry of rainwater, as well as with an additional entrance, a first outlet for the evacuation of the first fraction of rain and a second exit, at a higher height, to evacuate the remaining water. The first outlet has a vertical wall as an overflow, which in its upper part incorporates a grid or sieve that, in addition to filtering, limits the flow evacuated through said duct, allowing the cassette to accumulate a volume of the inside first fraction of water, which can then be evacuated through the conduit for treatment. It also has a filter device, located next to the overflow. In the procedure of using the sump, a) the water is collected by the upper opening or by the additional inlet, bi) if the flow is lower than the drain flow of the first outlet, it is evacuated through it, and, bii) if The flow is higher than the drain flow of the first outlet, one part accumulates inside the cassette and the other is evacuated, this flow being less than a predetermined value. If the rain is intense, as a result of the increase in the level, the water will begin to evacuate through the second exit (see summary; paragraphs 1322; figures 1-4). The difference between D1 and the technical matter of claims 1 and 10 lies in the connection of the first outlet to a conduit of a sanitation network. The technical problem that underlies the present application can be established as the provision of a mechanism that allows the first fraction of rain to be evacuated for treatment and recovery, instead of losing it in the subsoil. This problem and its solution are already included in document D2, which discloses a sump for the collection of rainwater that includes an upper opening for the entrance of rainwater from the street, and with a second additional entrance, and an outlet for the evacuation of water that is connected to a duct of a sanitation network. It has a float, which, when the level of water from the rain in the street rises, closes the access of water from the second additional entrance, so that in that case only the rainwater collected by the water is evacuated. top opening When the rain ceases, the buoy goes down and the second entry opens again (see summary; column 2, lines 35-44; figures 1,2). For an expert in the field, it would be obvious to connect the lower outlet of the sump of document D1 to the sewerage network, as disclosed in document D2, as well as the use of the buoy mentioned in the aforementioned document D2, as duct closure element described in document D1, resulting in the technical object set forth in claims 1-4,7,8,10-12 of the application. Therefore, claims 1-4,7,8,10-12 lack inventive activity in relation to what is disclosed in documents D1 and D2 (Art. 8 LP). State of the Art Report Page 4/4