CA1097179A - Device for equalizing and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle - Google Patents
Device for equalizing and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicleInfo
- Publication number
- CA1097179A CA1097179A CA321,273A CA321273A CA1097179A CA 1097179 A CA1097179 A CA 1097179A CA 321273 A CA321273 A CA 321273A CA 1097179 A CA1097179 A CA 1097179A
- Authority
- CA
- Canada
- Prior art keywords
- pressure
- valve member
- valve
- pressure chamber
- facing towards
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000007789 sealing Methods 0.000 claims description 8
- 208000036366 Sensation of pressure Diseases 0.000 abstract 1
- 101100016398 Danio rerio hars gene Proteins 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/005—Devices specially adapted for special wheel arrangements
- B60C23/007—Devices specially adapted for special wheel arrangements having multiple wheels arranged side by side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/04—Rims with dismountable flange rings, seat rings, or lock rings
- B60B25/14—Locking means for flange rings or seat rings
- B60B25/18—Arrangement of split rings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Measuring Fluid Pressure (AREA)
- Check Valves (AREA)
- Vehicle Body Suspensions (AREA)
- Control Of Fluid Pressure (AREA)
- Multiple-Way Valves (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The device serves for equalizing and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle. A pressure chamber provided with a lockable line is closed by a valve member so as to be imperious to the medium. A bias spring urges the valve number towards a valve seat into which the passageway of a pressure volume opens.
The active free area of the valve member facing towards the pres-sure chamber is larger than the cross-sectional area of the orifice of the connecting passageway. In order to keep the valve member closed also when the pressure in the pressure volume increases above the nominal pressure, the passageways of all the pressure volumes open into the valve seat and can be closed by means of the valve member. Moreover, the sum of the cross-sectional areas of all the orifices of the passageways is smaller than the active free area of the valve member facing towards the pressure chamber.
The device serves for equalizing and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle. A pressure chamber provided with a lockable line is closed by a valve member so as to be imperious to the medium. A bias spring urges the valve number towards a valve seat into which the passageway of a pressure volume opens.
The active free area of the valve member facing towards the pres-sure chamber is larger than the cross-sectional area of the orifice of the connecting passageway. In order to keep the valve member closed also when the pressure in the pressure volume increases above the nominal pressure, the passageways of all the pressure volumes open into the valve seat and can be closed by means of the valve member. Moreover, the sum of the cross-sectional areas of all the orifices of the passageways is smaller than the active free area of the valve member facing towards the pressure chamber.
Description
~g7~7~
The present invention relates to a device for equalizating and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle.
Such a device is disclosed for example, in Swiss Patent No. 570,2~1. The valve member of said device comprises a piston disposed in a cy]inder, a first regi.on of the cylinder bottom forming the valvc seat and a second region of the cylinder bottom forming a wall portion of the pressure chamber. The piston is mounted on a tapered end of the piston rod and connected to the cylinder wall by means of a sleeve, for example, a bellows or corrugated tube, so that the pressure volume is sealed. One connecting passage~ay of the pressure volume opens out into the valve seat ~hile the other con]lecting ~assageway of the other pressure volume opens out directly into the pressure chamber.
Under certain operating conditions this structure is unsatis-factory. One oE such Operat.;.llg COllditiOnS iS, :Eor example, when air temporarily escapes in the tire, which is connected to the pressure chamber of the apparatus b~ way of the connecting passageway so that the pressure in this tire reduces and causes the valve member to slose. When the pressure in this tire then rises again, for example, by squeezing or exposure to intense sunliaht, then this can cause the valve member to open again and the pressure to equalize again. ~s a result of thisj air continues to flow from the in-tact tire into the damaged tire until the valve memher closes again. Such a pressure drop in the tire which is intact per se results in the further detrimental pressure drop in the intact tire. This can result in inadmissible operating conditions and eventually in damage to the tire.
The present invention provides a device of the type described as aforesaid in which the valve men~er remains closed even ~hen in one pressure volume the pressure rises above the nominal pressure.
~097~79 "
According to the present invention there is provided a device for e~uali~ing a~.d controlling the pressure in at least two pressure volu~es comprising a valve member which closes a pressure chamher provided with a lockable line so as to be impervious to a medium said valve member being urged bv means of a bias spring towards a valve seat into which a connecting pass~
ageway of a pressure volume opens, the active free area of the valve member facing towards the pressure chamber being larger than the cross-sectional area of the orifice of the connecting ;
passageway in which the passageways of all the pressure volumes open into the valve seat and are closeable by the valve member and the sum of the cross-sectional areas of all the orifices of the passageways is smaller than the active free area of the valve member facinq to-~ards the pressure chamber.
Since all the connecting passagewavs open into the valve seat none of the pressures from the individual pressure volumes can become effective in the pressure cllamber and cause the closed valve rnember to open, not even when the pressure in one of the pressure volumes is higher than the nominal pressure.
The present invention relates to a device for equalizating and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle.
Such a device is disclosed for example, in Swiss Patent No. 570,2~1. The valve member of said device comprises a piston disposed in a cy]inder, a first regi.on of the cylinder bottom forming the valvc seat and a second region of the cylinder bottom forming a wall portion of the pressure chamber. The piston is mounted on a tapered end of the piston rod and connected to the cylinder wall by means of a sleeve, for example, a bellows or corrugated tube, so that the pressure volume is sealed. One connecting passage~ay of the pressure volume opens out into the valve seat ~hile the other con]lecting ~assageway of the other pressure volume opens out directly into the pressure chamber.
Under certain operating conditions this structure is unsatis-factory. One oE such Operat.;.llg COllditiOnS iS, :Eor example, when air temporarily escapes in the tire, which is connected to the pressure chamber of the apparatus b~ way of the connecting passageway so that the pressure in this tire reduces and causes the valve member to slose. When the pressure in this tire then rises again, for example, by squeezing or exposure to intense sunliaht, then this can cause the valve member to open again and the pressure to equalize again. ~s a result of thisj air continues to flow from the in-tact tire into the damaged tire until the valve memher closes again. Such a pressure drop in the tire which is intact per se results in the further detrimental pressure drop in the intact tire. This can result in inadmissible operating conditions and eventually in damage to the tire.
The present invention provides a device of the type described as aforesaid in which the valve men~er remains closed even ~hen in one pressure volume the pressure rises above the nominal pressure.
~097~79 "
According to the present invention there is provided a device for e~uali~ing a~.d controlling the pressure in at least two pressure volu~es comprising a valve member which closes a pressure chamher provided with a lockable line so as to be impervious to a medium said valve member being urged bv means of a bias spring towards a valve seat into which a connecting pass~
ageway of a pressure volume opens, the active free area of the valve member facing towards the pressure chamber being larger than the cross-sectional area of the orifice of the connecting ;
passageway in which the passageways of all the pressure volumes open into the valve seat and are closeable by the valve member and the sum of the cross-sectional areas of all the orifices of the passageways is smaller than the active free area of the valve member facinq to-~ards the pressure chamber.
Since all the connecting passagewavs open into the valve seat none of the pressures from the individual pressure volumes can become effective in the pressure cllamber and cause the closed valve rnember to open, not even when the pressure in one of the pressure volumes is higher than the nominal pressure.
2~ Thls is due to the fact that the sum of the cross-sectlonal areas of all~the orifices of the connecting passageways is smaller than the active free area of the valve member facing towards the pres~
:
sure chamber so that the pressures ln all the connecting passage-ways are not sufficient to cause the valve member to rise, not :
even when there is excess pressure in one of the connecting passageways. ~ ~
A particularly good sealing of the valve member at the ~ -orifices is attained when orifices have sealing lips facing towards the valve member~ and particularly when the valve member 30 has a gasket facing towards the orifices and the gasket is made of ~-material which can be displaced by the sealing lips.
In a particularly desirable embodiment of the present . ,. ,, :: ' ' : . .:
109~7g invention the valve member is a piston disposed in a cylinder and a first region of the cylinder bottom forms the valve seat and a second region of the cylinder bottom forms a wall portion of the pressure chamber. Suitably the piston is mounted on the tapered end of a piston rod and connected to the cylinder wall by a sleeve so as to seal the pressure cha~ber.
Although the device is particularly suitable for eaualizing and controlling the pressure in pneurnatic tires of a vehicle, it is also suitable for eauali~ing and controlling the pressures of general types of pressure volumes, as for exa~ple, for pressure chambers of watercraft. The device is partlcularly suitable for gaseous meAia. However, cases in which hydraulic media are used are also included.
The present invention will be further illustrated by way of the accompanying drawings in which;
Fig. 1, is a longitudinal section of a device according to one embodiment of the present invention, ;`
Fig. 2, is a plan view o the device of Figure 1, and Fig. 3, shows the detail III in Figure 1 on an enlarged 20 scale. `
:
Referring to the drawings, the device for e~.ualizing ~ ;
and controlling the pressures in at least two pressure volumes is -particularly sùltable for pneumatic tires of vehicles. The : .
device has a pressure chamber 1 having one wall formed bv a valve member 2 which is urged towards a valve seat 4 by means ~y a ~bias spring 3. A line 5 ~hi~ch can be hlockéd bY means of a ~-rellef valve 6 opens into the pressure chamber 1. Connectlng passageways 7 and 8 are to connect the pressure volumes (not shown~, which for example, are pneumatic tires of vehicles. Each of the connecting passageways opens into the valve seat 4. The active free area of the valve me~ber ~acing towards the pressure chamber is substantially larger than the sum of the cross-
:
sure chamber so that the pressures ln all the connecting passage-ways are not sufficient to cause the valve member to rise, not :
even when there is excess pressure in one of the connecting passageways. ~ ~
A particularly good sealing of the valve member at the ~ -orifices is attained when orifices have sealing lips facing towards the valve member~ and particularly when the valve member 30 has a gasket facing towards the orifices and the gasket is made of ~-material which can be displaced by the sealing lips.
In a particularly desirable embodiment of the present . ,. ,, :: ' ' : . .:
109~7g invention the valve member is a piston disposed in a cylinder and a first region of the cylinder bottom forms the valve seat and a second region of the cylinder bottom forms a wall portion of the pressure chamber. Suitably the piston is mounted on the tapered end of a piston rod and connected to the cylinder wall by a sleeve so as to seal the pressure cha~ber.
Although the device is particularly suitable for eaualizing and controlling the pressure in pneurnatic tires of a vehicle, it is also suitable for eauali~ing and controlling the pressures of general types of pressure volumes, as for exa~ple, for pressure chambers of watercraft. The device is partlcularly suitable for gaseous meAia. However, cases in which hydraulic media are used are also included.
The present invention will be further illustrated by way of the accompanying drawings in which;
Fig. 1, is a longitudinal section of a device according to one embodiment of the present invention, ;`
Fig. 2, is a plan view o the device of Figure 1, and Fig. 3, shows the detail III in Figure 1 on an enlarged 20 scale. `
:
Referring to the drawings, the device for e~.ualizing ~ ;
and controlling the pressures in at least two pressure volumes is -particularly sùltable for pneumatic tires of vehicles. The : .
device has a pressure chamber 1 having one wall formed bv a valve member 2 which is urged towards a valve seat 4 by means ~y a ~bias spring 3. A line 5 ~hi~ch can be hlockéd bY means of a ~-rellef valve 6 opens into the pressure chamber 1. Connectlng passageways 7 and 8 are to connect the pressure volumes (not shown~, which for example, are pneumatic tires of vehicles. Each of the connecting passageways opens into the valve seat 4. The active free area of the valve me~ber ~acing towards the pressure chamber is substantially larger than the sum of the cross-
-3-`' ~:
: ,. , ,, ,; . : ~
~9~7~
sectional areas of the orifices 9 and 10 of the connecti.ng passa~3eways 7 and 8. ^`
ReferLing particularly to Figure 3 the orifices 9 and 10 are provided with sealing lips 11, which face towards the va.lve me~ber 2 which is provi~ed with a gasket 12 ~acing towards the sealing lips 11. The gasket 12 comprises an elastic materia]
which can be dis].aced by the sealing lips so that a good seal between -the valve member and the orifices is assured.
The valve mem~er 2 is formed by a piston 13, ~-~hich is secured to a piston rod 14 and mounted on a tape~ed end thereof.
The piston 13 is mounted in a cylinder lS whose cylinder bo-t~om 16 is divided into two regions, a first region of the cylinder bottom foxming the valve seat a and a second region of the cvlinder bottom forming a wall portion of the press~re chamber 1. A sleeve in the form of a corrugated tube 17, which is disposed on the piS~OIl 13 and, on the cvlinder wall bv an inner ring 1~ so as to be impermeable to the medium, serves for seali.ntJ the piston 13. The bias spring 3 urges the piston 13 towards the valve seat
: ,. , ,, ,; . : ~
~9~7~
sectional areas of the orifices 9 and 10 of the connecti.ng passa~3eways 7 and 8. ^`
ReferLing particularly to Figure 3 the orifices 9 and 10 are provided with sealing lips 11, which face towards the va.lve me~ber 2 which is provi~ed with a gasket 12 ~acing towards the sealing lips 11. The gasket 12 comprises an elastic materia]
which can be dis].aced by the sealing lips so that a good seal between -the valve member and the orifices is assured.
The valve mem~er 2 is formed by a piston 13, ~-~hich is secured to a piston rod 14 and mounted on a tape~ed end thereof.
The piston 13 is mounted in a cylinder lS whose cylinder bo-t~om 16 is divided into two regions, a first region of the cylinder bottom foxming the valve seat a and a second region of the cvlinder bottom forming a wall portion of the press~re chamber 1. A sleeve in the form of a corrugated tube 17, which is disposed on the piS~OIl 13 and, on the cvlinder wall bv an inner ring 1~ so as to be impermeable to the medium, serves for seali.ntJ the piston 13. The bias spring 3 urges the piston 13 towards the valve seat
4. The initial stressinq force of the bias snring 3 can be adjusted by means of a set:screw 19 screwed into the cylinder 15.
The opening motion of the piston 13 is limited by a detent 2~.
. The end of cylinder 15 opposite to the valve seat 4 is preferably closed by means of a locking cap 21 so as to be impervious to the medium. This is advantageous particularly when .the device is exposed to rough operation, for example, when controlling the pneumatic tires of vehicles. In order to avoid ~ondensation, it is desirable to fill the cylinder volume with dry air or dry gas prior to closing the cylinder lS, If required, ~he pressure in the cylinder 15 may be riegative.
For eaualizing and controllina the pressure in pneumatic tires of a vehicle the device can be designed in the follo~?ing maililer. If the nominal pressure in a tire is supposed to be for ~1~97~L7~
examt~le, 8 bars, thell the valve rnemher 2 opens ~hen a pressure of at least 9 bars is applied to -the line 5. The valve member 2 closes as soon as the pressure in the pressure charnber l drops below 7 bars. On inflating the pi~eumatic tires by way of the ,line 5, the pressure cham,ber l and the passayewavs 7 and 8 to the nominal pressure of 8 bars, the valve member 2 thus remains open and the pressure can be equalized from one connecting passageway to other connecting passageway via the pressure chamber. Only when -the total pressure drops below 7 hars does the valve member 2 close and the pressure can no longer be eaualize~. If the pressure in one o~ the pneumatic tires rises again, for example, ' -' due to excessive heating, then this pressure rise cannot o~en the ~' valve member 2 since the pressure applied to the valve member 2 through the aperture cross-section of the ori~ice acts onl,v on an area of the valve member which corresponds to the cross-section of the orifice. Even if this pressure is substantially higher ,~,;
than the nominal pressure of the tire, it is not hiah enouah to open the valve member. Th.is thus assures that once a valve member 2 is closed it cannot ~e opened a~ain by an excess pressure in the connected pressure volu~es, but it can be opened only by renewed supply of pressure via the line 5. ' -At a sudden pressure drop in one of the tressure volumes the valve member 2 closes in~ediatel,v.
- The valve me~ber ma;v also be designed as a diaphragm, which is clamped between the walls of a pressure chamber. The device can also be provided with indicating means which indicate the closing of the valve mem1~er. This can be done in the form of mechanical or electric siqnals.
30' ,
The opening motion of the piston 13 is limited by a detent 2~.
. The end of cylinder 15 opposite to the valve seat 4 is preferably closed by means of a locking cap 21 so as to be impervious to the medium. This is advantageous particularly when .the device is exposed to rough operation, for example, when controlling the pneumatic tires of vehicles. In order to avoid ~ondensation, it is desirable to fill the cylinder volume with dry air or dry gas prior to closing the cylinder lS, If required, ~he pressure in the cylinder 15 may be riegative.
For eaualizing and controllina the pressure in pneumatic tires of a vehicle the device can be designed in the follo~?ing maililer. If the nominal pressure in a tire is supposed to be for ~1~97~L7~
examt~le, 8 bars, thell the valve rnemher 2 opens ~hen a pressure of at least 9 bars is applied to -the line 5. The valve member 2 closes as soon as the pressure in the pressure charnber l drops below 7 bars. On inflating the pi~eumatic tires by way of the ,line 5, the pressure cham,ber l and the passayewavs 7 and 8 to the nominal pressure of 8 bars, the valve member 2 thus remains open and the pressure can be equalized from one connecting passageway to other connecting passageway via the pressure chamber. Only when -the total pressure drops below 7 hars does the valve member 2 close and the pressure can no longer be eaualize~. If the pressure in one o~ the pneumatic tires rises again, for example, ' -' due to excessive heating, then this pressure rise cannot o~en the ~' valve member 2 since the pressure applied to the valve member 2 through the aperture cross-section of the ori~ice acts onl,v on an area of the valve member which corresponds to the cross-section of the orifice. Even if this pressure is substantially higher ,~,;
than the nominal pressure of the tire, it is not hiah enouah to open the valve member. Th.is thus assures that once a valve member 2 is closed it cannot ~e opened a~ain by an excess pressure in the connected pressure volu~es, but it can be opened only by renewed supply of pressure via the line 5. ' -At a sudden pressure drop in one of the tressure volumes the valve member 2 closes in~ediatel,v.
- The valve me~ber ma;v also be designed as a diaphragm, which is clamped between the walls of a pressure chamber. The device can also be provided with indicating means which indicate the closing of the valve mem1~er. This can be done in the form of mechanical or electric siqnals.
30' ,
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A device for equalizing and controlling the pressure in at least two pressure volumes, comprising a valve member which closes a pressure chamber provided with a lockable line so as to be impervious to a medium, said valve member being urged by means of a bias spring towards a valve seat into which a connecting passageway of a pressure volume opens the active free area of the valve member facing towards the pressure chamber being larger than the cross-sectional area of the orifice of the connecting passageway in which the passageways of all the pressure volumes open into the valve seat and are closeable by the valve member and the sum of the cross-sectional areas of all the orifices of the passageways is smaller than the active free area of the valve member facing towards the pressure chamber.
2. A device according to Claim 1, in which the orifices have sealing lips facing towards the valve member.
3. A device according to Claim 2, in which the valve member has a gasket facing towards the orifices and the gasket is made of material which can be displaced by the sealing lips.
4. A device according to Claim 1, in which the valve member is a piston disposed in a cylinder and a first region of the cylinder bottom forms the valve seat and a second region of the cylinder bottom forms a wall portion of the pressure chamber.
5. A device according to Claim 4, in which the piston is mounted on the tapered end of a piston rod and connected to the cylinder wall by a sleeve, so as to seal the pressure chamber.
6. A device according to Claim 5, in which the sleeve is a corrugated tube.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH155978A CH626572A5 (en) | 1978-02-13 | 1978-02-13 | |
| CH1559/78-7 | 1978-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1097179A true CA1097179A (en) | 1981-03-10 |
Family
ID=4213252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA321,273A Expired CA1097179A (en) | 1978-02-13 | 1979-02-12 | Device for equalizing and controlling the pressure in at least two pressure volumes, particularly in pneumatic tires of a vehicle |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0003722B1 (en) |
| JP (1) | JPH0233521B2 (en) |
| AT (1) | AT362248B (en) |
| AU (1) | AU529230B2 (en) |
| CA (1) | CA1097179A (en) |
| CH (1) | CH626572A5 (en) |
| DE (1) | DE2822514A1 (en) |
| ES (1) | ES477624A1 (en) |
| GB (1) | GB2035923A (en) |
| SE (2) | SE416918B (en) |
| WO (1) | WO1979000618A1 (en) |
| ZA (1) | ZA79595B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3164660D1 (en) * | 1980-04-03 | 1984-08-16 | Etter Hansruedi Felix | Apparatus for monitoring air pressure in at least one tyre of a vehicle |
| DE3124478A1 (en) * | 1981-06-23 | 1982-12-30 | Robert Bosch Gmbh, 7000 Stuttgart | For a tyre pressure control system of motor vehicles... |
| IT8753066V0 (en) * | 1987-02-25 | 1987-02-25 | Zorzi Esterina | PRESSURE AND SAFETY BALANCING DEVICE FOR FLUID SYSTEMS, PARTICULARLY FOR MOTOR VEHICLE TIRES |
| IT1211227B (en) * | 1987-07-21 | 1989-10-12 | Urmet Spa | VALVE VALVE DISPENSER SELECTIVE LOCKING PRESSURE BALANCER FOR TIRES OF TWIN-WHEELED VEHICLES EQUIPPED WITH MINIMUM ON-BOARD SIGNALING SYSTEM |
| DE4341789A1 (en) * | 1993-12-08 | 1994-12-01 | Crom Hans Georg | Pressure equalizing device and method for its manufacture |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1622332A (en) * | 1925-10-07 | 1927-03-29 | Marrazzo Domenico | Inner-tire valve |
| US1882455A (en) * | 1930-10-04 | 1932-10-11 | Spicer Airflater Inc | Dual tire pressure equalizer |
| NL96360C (en) * | 1957-01-04 | |||
| CH570281A5 (en) * | 1973-04-06 | 1975-12-15 | Etter Hansruedi Felix |
-
1976
- 1976-11-25 SE SE7908469A patent/SE416918B/en unknown
-
1978
- 1978-02-13 CH CH155978A patent/CH626572A5/de not_active IP Right Cessation
- 1978-05-23 DE DE19782822514 patent/DE2822514A1/en active Granted
-
1979
- 1979-02-06 AT AT87479A patent/AT362248B/en not_active IP Right Cessation
- 1979-02-09 JP JP54500360A patent/JPH0233521B2/ja not_active Expired - Lifetime
- 1979-02-09 WO PCT/CH1979/000021 patent/WO1979000618A1/en not_active Ceased
- 1979-02-09 GB GB7933854A patent/GB2035923A/en not_active Withdrawn
- 1979-02-12 ZA ZA79595A patent/ZA79595B/en unknown
- 1979-02-12 ES ES477624A patent/ES477624A1/en not_active Expired
- 1979-02-12 AU AU44176/79A patent/AU529230B2/en not_active Ceased
- 1979-02-12 EP EP79810015A patent/EP0003722B1/en not_active Expired
- 1979-02-12 CA CA321,273A patent/CA1097179A/en not_active Expired
- 1979-10-12 SE SE7908469A patent/SE417588B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATA87479A (en) | 1980-09-15 |
| SE7908469L (en) | 1979-10-12 |
| WO1979000618A1 (en) | 1979-09-06 |
| AU4417679A (en) | 1979-08-23 |
| SE417588B (en) | 1981-03-30 |
| GB2035923A (en) | 1980-06-25 |
| JPH0233521B2 (en) | 1990-07-27 |
| SE7613204L (en) | 1976-11-25 |
| SE416918B (en) | 1981-02-16 |
| ZA79595B (en) | 1980-02-27 |
| DE2822514A1 (en) | 1979-08-16 |
| ES477624A1 (en) | 1979-07-16 |
| EP0003722B1 (en) | 1981-11-25 |
| CH626572A5 (en) | 1981-11-30 |
| AU529230B2 (en) | 1983-06-02 |
| EP0003722A1 (en) | 1979-08-22 |
| JPS55500321A (en) | 1980-06-05 |
| AT362248B (en) | 1981-04-27 |
| DE2822514C2 (en) | 1988-04-07 |
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