CA1172133A - Valves - Google Patents
ValvesInfo
- Publication number
- CA1172133A CA1172133A CA000391357A CA391357A CA1172133A CA 1172133 A CA1172133 A CA 1172133A CA 000391357 A CA000391357 A CA 000391357A CA 391357 A CA391357 A CA 391357A CA 1172133 A CA1172133 A CA 1172133A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- closure
- aperture
- actuating means
- rolling
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/022—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0853—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in a single plane perpendicular to the axis of the plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/18—Special arrangements for separating the sealing faces or for pressing them together for plugs with cylindrical surfaces
- F16K5/184—Special arrangements for separating the sealing faces or for pressing them together for plugs with cylindrical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing
- F16K5/187—Special arrangements for separating the sealing faces or for pressing them together for plugs with cylindrical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing with rolling action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/18—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with diaphragm secured at one side only, e.g. to be laid on the seat by rolling action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
ABSTRACT
Valves (1) including an apertured body (2) allowing the passage of fluid may be sealed by a resilient closure (8) actuated by actuating means (28) so as to roll a portion of the closure (8) over the aperture (7).
Valves (1) including an apertured body (2) allowing the passage of fluid may be sealed by a resilient closure (8) actuated by actuating means (28) so as to roll a portion of the closure (8) over the aperture (7).
Description
~7~33 1.
VALVES
This invention relates to valves.
Many different types of valves have been proposqd for use in the control of fluid flow. Valves commonly in use include a valve body having at least one aperture through which fluid may pass and some form of valve closure which may be moved so as to cover the aperture and prevent or restrict passage of fluid through the aperture. Some such valve closures employ flexible or resilient materials to assist in forming and maintaining the cover of the aperture However, as far as applicant is aware, none of the valves suggested by the prior art are constructed or actuated in a similar manner to the valves of the present invention.
An aspect of the invention is as follows:
A valve comprising a body, an aperture in a surface of said body through which fluid may pass, a resilient valve closure having a continuous closed surface comprised of a first portion in contact with said surface of said body, a second portion out of contact with said surface of said body and a third, curved, portion interconnecting the first portion and the second portion, and actuating means external to the valve closure for ~5 causing a rolling of said closure such as to cause at least part of said third portion to move to overlie said surface of said body in the region of said aperture and to cause at least part of the second portion to take up a curved position similar to that of said third portion, said rolling thereby providing for said closure to close said aperture; and wherein said valve closure is not physically connected to said valve body or to said actuating means.
The valve closure may be a solid body able to roll along said surface of the valve body. In this respect the closure might be spherical or conical but preferably the closure, if solid, is cylindrical. The use of a solid , ~.~,, ~
~J"
body valve closure is preferred if the valve is to be subjected to high pressures.
However, there are many applications of the invention where it is preferred that the cross section of the valve closure comprises a closed loop of material comprised of two lengths joined by bights at each end. In the case of a closed loop or solid body valve closure there is no physical connection of the closure with the apertured surface of the valve body and the actuating means.
The apertured surface of the valve body may be planar or curved.
The valve closure may be made of any suitable material but particularly preferred materials include metals, rubbers, both synthetic and natural and resilient synthetic plastics materials. In general, materials suitable for the closure are those sufficiently resilient to withstand the flexing and strength sufficient to withstand the pressures which will be encountered. Among materials which have been used are mylar film, reinforced rubber sheet, polyurethane rubber, stainless steel spring tape, silicone rubber and neoprene rubber. Of particular interest is that the closure may simpl~ be a length of resilient tubing.
The ac-tuating means may include a member which moves linearly, in an arc or rotates or revolves. As previously stated, that member is not physically connected to the closure as it has been found that no more than a frictional engagement is required.
Specific constructions of valves in accordance with this invention will now be described by way of example with the aid of thP accompanying drawings in which:
Figure 1 is a cross-sectional view of a first valve, Figure 2 is a cross-sectional view on line II-II
in Figure 1, Figure 3 shows alternative port arrangements, Figure 4 is a cross-sectional view of a second valve, ~, 1~7;2133 3.
Figure 5 is a cross-sectional view on line V-V
in Figure 4, and Figure 6 is a cross-sectional view of a third valve.
The first valve as shown in Figures 1 and 2 comprises a first body part 2 having a cylindrical inner chamber 3, an axial inlet 4 to the chamber 3 and a peripheral outlet 6 from the chamber 3. The members defining inlet 4 and outlet 6 may be threaded for connection to piping.
The outlet 6 is provided with a plurality of small ports 7 so as to leave a substantial portion of the cylindrical wall of the chamber 3 available to support a valve closure 8. The first body part 2 also has a recess 9 in which an O-ring seal 21 is received. The first valve also includes a second body part 22 which is secured to the first body part 2 in any convenient way.
The second body part 22 has a recess 23 in which is located an O-ring seal 24 and supports a shaft 26 having an outer end 27 which may be rotated in any convenient way such as by hand and an inner end 28 which will be turned by the outer end 27. To assist rotation of shaft 26, a knob or similar device may be mounted on its outer end 27.
The valve closure 8 is a length of cylindrical flexible tubing which has been forced into the space between the inner end 28 and the c~lindrical wall of the chamber 3-and so has ~aken up the curved oval shape seen in Figure
VALVES
This invention relates to valves.
Many different types of valves have been proposqd for use in the control of fluid flow. Valves commonly in use include a valve body having at least one aperture through which fluid may pass and some form of valve closure which may be moved so as to cover the aperture and prevent or restrict passage of fluid through the aperture. Some such valve closures employ flexible or resilient materials to assist in forming and maintaining the cover of the aperture However, as far as applicant is aware, none of the valves suggested by the prior art are constructed or actuated in a similar manner to the valves of the present invention.
An aspect of the invention is as follows:
A valve comprising a body, an aperture in a surface of said body through which fluid may pass, a resilient valve closure having a continuous closed surface comprised of a first portion in contact with said surface of said body, a second portion out of contact with said surface of said body and a third, curved, portion interconnecting the first portion and the second portion, and actuating means external to the valve closure for ~5 causing a rolling of said closure such as to cause at least part of said third portion to move to overlie said surface of said body in the region of said aperture and to cause at least part of the second portion to take up a curved position similar to that of said third portion, said rolling thereby providing for said closure to close said aperture; and wherein said valve closure is not physically connected to said valve body or to said actuating means.
The valve closure may be a solid body able to roll along said surface of the valve body. In this respect the closure might be spherical or conical but preferably the closure, if solid, is cylindrical. The use of a solid , ~.~,, ~
~J"
body valve closure is preferred if the valve is to be subjected to high pressures.
However, there are many applications of the invention where it is preferred that the cross section of the valve closure comprises a closed loop of material comprised of two lengths joined by bights at each end. In the case of a closed loop or solid body valve closure there is no physical connection of the closure with the apertured surface of the valve body and the actuating means.
The apertured surface of the valve body may be planar or curved.
The valve closure may be made of any suitable material but particularly preferred materials include metals, rubbers, both synthetic and natural and resilient synthetic plastics materials. In general, materials suitable for the closure are those sufficiently resilient to withstand the flexing and strength sufficient to withstand the pressures which will be encountered. Among materials which have been used are mylar film, reinforced rubber sheet, polyurethane rubber, stainless steel spring tape, silicone rubber and neoprene rubber. Of particular interest is that the closure may simpl~ be a length of resilient tubing.
The ac-tuating means may include a member which moves linearly, in an arc or rotates or revolves. As previously stated, that member is not physically connected to the closure as it has been found that no more than a frictional engagement is required.
Specific constructions of valves in accordance with this invention will now be described by way of example with the aid of thP accompanying drawings in which:
Figure 1 is a cross-sectional view of a first valve, Figure 2 is a cross-sectional view on line II-II
in Figure 1, Figure 3 shows alternative port arrangements, Figure 4 is a cross-sectional view of a second valve, ~, 1~7;2133 3.
Figure 5 is a cross-sectional view on line V-V
in Figure 4, and Figure 6 is a cross-sectional view of a third valve.
The first valve as shown in Figures 1 and 2 comprises a first body part 2 having a cylindrical inner chamber 3, an axial inlet 4 to the chamber 3 and a peripheral outlet 6 from the chamber 3. The members defining inlet 4 and outlet 6 may be threaded for connection to piping.
The outlet 6 is provided with a plurality of small ports 7 so as to leave a substantial portion of the cylindrical wall of the chamber 3 available to support a valve closure 8. The first body part 2 also has a recess 9 in which an O-ring seal 21 is received. The first valve also includes a second body part 22 which is secured to the first body part 2 in any convenient way.
The second body part 22 has a recess 23 in which is located an O-ring seal 24 and supports a shaft 26 having an outer end 27 which may be rotated in any convenient way such as by hand and an inner end 28 which will be turned by the outer end 27. To assist rotation of shaft 26, a knob or similar device may be mounted on its outer end 27.
The valve closure 8 is a length of cylindrical flexible tubing which has been forced into the space between the inner end 28 and the c~lindrical wall of the chamber 3-and so has ~aken up the curved oval shape seen in Figure
2.
On rotation of the inner end 28 in the direction of the arrow 29 in Figure 2 the section 31 of the closure 8 will move in the direction of the arrow 32 so that some of it replaces part of the curved portion 33 and so that part of the curved portion 33 o~erlies the ports 7 and hence closes the outlet 6 of the first valve.
Opening the first valve can be performed by reversing~
the direction of rotation Or the inner end 28 or by continuing to rotate it in the direction of the arrow 29.
.~ ,. , ~3L7;Z133 4.
Since the closure 8 is flexible it may need substantial support in the area of the outlet 6. Various alternative shapes of outlet ports are shown in Figure 3. Where a single large port is required, the closure may be supported by appropriate internal reinforcement.
In the second valve 70 as shown in Figures 4 and 5 body parts 71 and 72 are sealed by an 0-ring 73, a shaft 74 is sealed by an 0-ring 76, body part 71 has an inlet 76 and an outlet 77 and a valve closure 78 comprises a strip of flexible material connected to surface 79 of the body part 71 and to the shaft 74. Rotation of the shaft 74 will cause a rolling of the closure 78 to uncover and cover the outlet 77.
Figure 6 shows a third valve 100 similar in construction to that of Figures 1 and 2 but applied to a valve for use in the supply of blood or saline solution. Actuator shaft 101 for closure 102 moves with a cover plate rotatably attached to body part 103. The cover plate movement and hence adjustment of the position of closure 102 is facilitated - by lever arm 104 which forms part of the cover plate.
Channel 105, the size of which is exaggerated in the figure, is tapered in depth as shown and may also be tapered in width to provide fine 1OW rate adjustment from port 106.
Each of the different forms of valve shown in the drawings differs in detailed construction but ea~h incorporates the principles of the present invention.
The invention can thus be applied to many different uses and it is to be understood that the examples illustrated in the drawings are not intended to limit the scope of the invention.
Valves in accordance with this invention are relatively simple and correspondingly cheap to make. For example, simple castings or machining can be used, there is unlikely to be any critical machining, 0-rings may be used to provide good seals between fixed or movable parts, low operating force is required, substantial pressure can be resisted and the valve is suitable ~or corrosive liquids or gases.
~7;~33 5.
Dirt in the fluid is not a great problem as the flexibility of the closures allows at least partial compensation for the presence of dirt particles.
Valves in accordance with this invention may be applied industrlally or domestically for hot and cold fluids. The valves may be solenoid or motor controlled and pneumatic, hydrauIic and vacuum applications are possible.
Multi-port valves, cistern and float valves, and metering valves may be made.
One particular application is in respect of valves for medical use such as in supplying blood, saline solution or gases in that valves in accordance with this invention maintain delivery at a controlled rate after setting apart from normal dependence on pressure head variation.
,, ~
- .
On rotation of the inner end 28 in the direction of the arrow 29 in Figure 2 the section 31 of the closure 8 will move in the direction of the arrow 32 so that some of it replaces part of the curved portion 33 and so that part of the curved portion 33 o~erlies the ports 7 and hence closes the outlet 6 of the first valve.
Opening the first valve can be performed by reversing~
the direction of rotation Or the inner end 28 or by continuing to rotate it in the direction of the arrow 29.
.~ ,. , ~3L7;Z133 4.
Since the closure 8 is flexible it may need substantial support in the area of the outlet 6. Various alternative shapes of outlet ports are shown in Figure 3. Where a single large port is required, the closure may be supported by appropriate internal reinforcement.
In the second valve 70 as shown in Figures 4 and 5 body parts 71 and 72 are sealed by an 0-ring 73, a shaft 74 is sealed by an 0-ring 76, body part 71 has an inlet 76 and an outlet 77 and a valve closure 78 comprises a strip of flexible material connected to surface 79 of the body part 71 and to the shaft 74. Rotation of the shaft 74 will cause a rolling of the closure 78 to uncover and cover the outlet 77.
Figure 6 shows a third valve 100 similar in construction to that of Figures 1 and 2 but applied to a valve for use in the supply of blood or saline solution. Actuator shaft 101 for closure 102 moves with a cover plate rotatably attached to body part 103. The cover plate movement and hence adjustment of the position of closure 102 is facilitated - by lever arm 104 which forms part of the cover plate.
Channel 105, the size of which is exaggerated in the figure, is tapered in depth as shown and may also be tapered in width to provide fine 1OW rate adjustment from port 106.
Each of the different forms of valve shown in the drawings differs in detailed construction but ea~h incorporates the principles of the present invention.
The invention can thus be applied to many different uses and it is to be understood that the examples illustrated in the drawings are not intended to limit the scope of the invention.
Valves in accordance with this invention are relatively simple and correspondingly cheap to make. For example, simple castings or machining can be used, there is unlikely to be any critical machining, 0-rings may be used to provide good seals between fixed or movable parts, low operating force is required, substantial pressure can be resisted and the valve is suitable ~or corrosive liquids or gases.
~7;~33 5.
Dirt in the fluid is not a great problem as the flexibility of the closures allows at least partial compensation for the presence of dirt particles.
Valves in accordance with this invention may be applied industrlally or domestically for hot and cold fluids. The valves may be solenoid or motor controlled and pneumatic, hydrauIic and vacuum applications are possible.
Multi-port valves, cistern and float valves, and metering valves may be made.
One particular application is in respect of valves for medical use such as in supplying blood, saline solution or gases in that valves in accordance with this invention maintain delivery at a controlled rate after setting apart from normal dependence on pressure head variation.
,, ~
- .
Claims (5)
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A valve comprising a body, an aperture in a surface of said body through which fluid may pass, a resilient valve closure having a continuous closed surface comprised of a first portion in contact with said surface of said body, a second portion out of contact with said surface of said body and a third, curved, portion interconnecting the first portion and the second portion, and actuating means external to the valve closure for causing a rolling of said closure such as to cause at least part of said third portion to move to overlie said surface of said body in the region of said aperture and to cause at least part of the second portion to take up a curved position similar to that of said third portion, said rolling thereby providing for said closure to close said aperture; and wherein said valve closure is not physically connected to said valve body or to said actuating means.
2. A valve as claimed in claim 1 wherein said valve closure cross-section consists of a closed loop.
3. A valve as claimed in claim 2 wherein said valve closure consists of a length of resilient tubing.
4. A valve as claimed in claim 1 wherein said valve body includes an inlet and an outlet including said aperture, said valve closure consists of a length of resilient tubing partly compressed between said valve body and said actuating means including a shaft colinear with said length of tubing and rotatable so as to cause said rolling of said closure.
5. A valve as claimed in claim 1 wherein said valve body includes one inlet between two spaced and oppositely directed outlets, each said outlet including at least one said aperture, two said valve closures each comprising a length of resilient tubing mounted on but not physically connected to opposite sides of said actuating means, said actuating means including a shaft reciprocable so as to cause said rolling of said closures between said outlets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPE676280 | 1980-12-04 | ||
| AU6762/80 | 1980-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1172133A true CA1172133A (en) | 1984-08-07 |
Family
ID=3768867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000391357A Expired CA1172133A (en) | 1980-12-04 | 1981-12-02 | Valves |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0065972A4 (en) |
| JP (1) | JPS57502134A (en) |
| AU (1) | AU7830881A (en) |
| CA (1) | CA1172133A (en) |
| IL (1) | IL64414A0 (en) |
| IT (1) | IT1142089B (en) |
| WO (1) | WO1982001924A1 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4718453A (en) * | 1987-02-06 | 1988-01-12 | Bergstrom Manufacturing Co. | Rotary valve |
| FR2626954B1 (en) * | 1988-02-10 | 1990-06-01 | Solex | ELECTRICALLY CONTROLLED ROTARY VALVE AND POWER SUPPLY DEVICE FOR MOTOR COMPRISING APPLICATION |
| SE466780B (en) * | 1990-05-31 | 1992-04-06 | Alfa Laval Agri Int | MJOELKNINGSPULSATOR |
| SE465737B (en) * | 1990-05-31 | 1991-10-21 | Alfa Laval Agri Int | VALVE DEVICE |
| SE506062C2 (en) * | 1996-02-26 | 1997-11-03 | Alfa Laval Agri Ab | valve device |
| AUPO517197A0 (en) | 1997-02-18 | 1997-04-11 | Safety Equipment Australia Pty Ltd | Pressure compensating valve |
| AU718178B2 (en) * | 1997-02-18 | 2000-04-06 | Safety Equipment Sweden Ab | Pressure compensating valve |
| US6039075A (en) * | 1997-06-12 | 2000-03-21 | Sarco Lc | Band controlled valve/actuator |
| GB2327112A (en) * | 1998-03-20 | 1999-01-13 | Sobegina Trading Limited | Whirlwind tube |
| US7051994B2 (en) * | 2001-07-18 | 2006-05-30 | Belimo Holding Ag | Control valve with detachable descrete curtain valve assembly |
| DE102007014373A1 (en) * | 2007-03-26 | 2008-10-30 | Continental Automotive Gmbh | Valve |
| JP5864171B2 (en) * | 2011-09-08 | 2016-02-17 | 株式会社不二工機 | Three-way valve |
| JP2017127841A (en) * | 2016-01-22 | 2017-07-27 | 日本濾過器株式会社 | Filter and valve device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2784740A (en) * | 1957-03-12 | stages erg | ||
| US2180173A (en) * | 1937-12-20 | 1939-11-14 | Share Barnett | Float valve for hydraulic pumping systems |
| CH298612A (en) * | 1943-11-05 | 1954-05-15 | Allg Feuerloescher Aktiengesel | Shut-off device for pipelines, jet pipes and the like, in particular for fire-fighting purposes. |
| US2720218A (en) * | 1951-03-29 | 1955-10-11 | Johnson Service Co | Fluid pressure operated dampers of the dual type |
| DE895303C (en) * | 1951-11-15 | 1953-11-02 | Herm J Hellmers G M B H | Sprinkler with rotary valve shut-off and control element for fluids interspersed with impurities, such as. B. in explosive vehicles |
| SE400823B (en) * | 1972-04-18 | 1978-04-10 | Albany Eng Syst | CONTROL VALVE WITH A PRESSURE CONTROLLED CHAMBER |
| US3815626A (en) * | 1972-09-28 | 1974-06-11 | C Bryant | Apparatus for the automatic regulation of the flow of fluid |
| JPS541038B2 (en) * | 1972-12-21 | 1979-01-19 | ||
| DE2629483A1 (en) * | 1975-07-08 | 1977-01-27 | Mantec Ind Ltd | FLUID FLOW CONTROL DEVICE |
-
1980
- 1980-12-04 AU AU78308/81A patent/AU7830881A/en not_active Abandoned
-
1981
- 1981-11-30 IT IT8125364A patent/IT1142089B/en active
- 1981-12-01 IL IL64414A patent/IL64414A0/en unknown
- 1981-12-02 CA CA000391357A patent/CA1172133A/en not_active Expired
- 1981-12-04 JP JP57500039A patent/JPS57502134A/ja active Pending
- 1981-12-04 EP EP19820900007 patent/EP0065972A4/en not_active Withdrawn
- 1981-12-04 WO PCT/AU1981/000184 patent/WO1982001924A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IL64414A0 (en) | 1982-03-31 |
| JPS57502134A (en) | 1982-12-02 |
| AU7830881A (en) | 1982-08-05 |
| EP0065972A4 (en) | 1983-04-18 |
| IT8125364A0 (en) | 1981-11-30 |
| IT1142089B (en) | 1986-10-08 |
| EP0065972A1 (en) | 1982-12-08 |
| WO1982001924A1 (en) | 1982-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |