CA1254107A - Straightway or multi-directional control valve of wafer construction - Google Patents
Straightway or multi-directional control valve of wafer constructionInfo
- Publication number
- CA1254107A CA1254107A CA000464033A CA464033A CA1254107A CA 1254107 A CA1254107 A CA 1254107A CA 000464033 A CA000464033 A CA 000464033A CA 464033 A CA464033 A CA 464033A CA 1254107 A CA1254107 A CA 1254107A
- Authority
- CA
- Canada
- Prior art keywords
- cover plates
- control plate
- distance pieces
- valve
- distance
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
-
- 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
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
-
- 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
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Valve Housings (AREA)
- Multiple-Way Valves (AREA)
Abstract
Abstract Straightway or multi-directional control valve of water construction The subject matter of this invention is a straightway or multi-directional control valve of wafer construction consisting of at least two stationary external cover plates between which are located one or several distance pieces for creating a receptacle chamber foramoving control plate, the thickness of which is less than the clear distance between the cover plates, whereby said distance pieces and the control plate are plane-parallel and each of the same thickness,and whereby a lamination is located between the distance pieces and the cover plates for forming a defined gap between the control plate and the cover plates.
Fig. 2
Fig. 2
Description
41(~7 Accordinglv, the invention is based on the technical problem of removing this disadvantage and creating a straightway or multi-directional control valve of the type mentioned at the beginning which is easy to manufacture, simple in design and reliable in operation.
This objective has been successfully achieved owing to the fact that the distance pieces and the control plate are plane-parallel and each of the same thickness, and that between the distance pieces and the cover plates is located a lamination for forming a defined gap between the control plate and the cover plates.
According to one design feature of the invention, the lamination consists of an adhesive with particles of a defined size having a maximum cross-sectional dimension less than or equal to the requisite size of the gap between the control plate and the cover plates, whereby the components thus cemented together and the control plate form a proper constructional element ready for assembly. According to a further development of the invention, the cover plates, the distance pieces and the control plate are all manufactured from a ceramic material. Finally, as a further distinguishing feature, claim is laid to a process for manufacturing a valve in accordance with the invention, according to which process the distance pieces and the control plate are manufactured from one single piece which has been processed such that it is plane-paralled and thus of uniform thickness, the distance pieces and the control plate being subsequently separated from one another.
The lamination which forms the gap can be produced in various ways. Coating on the distance pieces and/or the cover plates are conceivable. In the case of a coating on the cover plates, masks are required in the operating range lZ~41(~7 :.```~
coating is applied in these areas. In the case of an ,-alternative coating means for the distance pieces, correlation between the control plate and the distance -pieces which come from a common processed piece must be ensured as the distance pieces or control plates from other workpieces may differ considerably in dimension, something which, incidentally, is quite permissible. A combination of distance pieces and control plates which were not subjected to this common i-~
process must, therefore, be avoided for the reasons mentioned. t`
A cement layer in accordance with the invention,which -cements the distance pieces and the cover plates together, has proved particularly advantageous. The cement lamination, once set, absorbs the forces resulting from the subsequent pressure loading on the cover plates. The resistance to pressure of these cement laminations is quite considerable as they are kept within the range of 0.5 - 2 microns, producing a total gap at the controlp~e of approx. 1 - 4 microns depending upon the~dcfincd ci~o of the particles added to the cement. The components thus cemented together can, if the cover plates are metallic and, at the same time, constitute the valve body, be bolted together after the cement has set. During the setting process, only moderate force may be applied for displacing the excess cement, otherwise there is the danger of the particles being crushed. In cases where the cover plates do not also constitute the valve body, the cemented and proper constructional unit can be easily inserted into a housing. The layer forming the gap could, of course, also be manufactured by some other method. Coatings on the distance pieces or on the cover plates are also conceivable in the form of chemical or electro-plating deposits, and also deposits formed in the so-called PVD and CVD processes.
A ` -~4 . , .
41C~
of the control plate so that no coating is applied in these areas. In the case of an alternative coating means for the distance pieces, correlation between the control plate and the distance pieces which come from a common processed piece must be ensured as the distance pieces or control plates from other workpieces may differ considerably in dimension, something which, incidentally, is quite permissible. A
combination of distance pieces and control plates which were not subjected to this common process must, therefore, be avoided for the reasons mentioned.
A cement layer in accordance with the invention, which cements the distance pieces and the cover plates together, has proved particularly advantageous. The cement lamination, once set, absorbs the forces resulting from the subsequent pressure loading on the cover plates. The resistance to pressure of these cement laminations is quite considerable as they are kept within the range 0.5 - 2 microns, producing a total gap at the control plate of approx. 1 - 4 microns depending upon the maximum cross sectional dimension of the particles added to the cement. The components thus cemented together can, if the cover plates are metallic and, at the same time, constitute the valve body, be bolted together after the cement has set.
During the setting process, only moderate force may be applied for displacing the excess cement, otherwise there is the danger of the particles being crushed. In cases where the cover plates do not also constitute the valve body, the cemented and proper constructional unit can be easily inserted into a housing.
The layer forming the gap could, of course, also be manufactured by some other method. Coatings on the distance pieces or on the cover plates are also conceivable in the form of chemical or electro-plating deposits, and also deposits formed in the so-called PVD and CVD processes.
_ 4 _ 1 ~54 10 7 A valve according to the invention of wafer construction can, in contrast to piston valves, be simply manufactured owing to the flat, undercut-free shape of the plates and distance pieces, employing sintered materials which are processed by pressing, firing and subsequent flat working. Of particular interest in this connection is the applicability of aluminium oxide ceramics or other ceramics. These materials undergo little or no wear owing to their considerable hardness, and can be manufactured cheaply with flat surfaces of very low peak-to-valley values. The surface quality depends upon the required gap tolerance. Where tolerances are close, the peak-to-valley height can be easily maintained below Ra = 0.1 ~m. In the event that the distance pieces and the control plate are, in accordance with the invention, manufactured from a single piece which has been processed for plane-parallelity with uniform thickness throughout, the subsequent separation of the components from one another can be carried out by means of saws or laser cutting. No distortion of the components will take place owing to the sintered structure which is completely - stress-free.
A valve in accordance with the invention is, of course, suitable for other applications apart from the hydraulics sector. For example, applications in pneumatic systems, and particularly high-pressure pneumatic systems is quite conceivable. Likewise, a valve of this kind can also be employed as a mixer valve for the sanitary valves and fittings sector.
The drawing illustrates the subject matter in the form of an example embodiment as a multi-directional high-pressure gate valve, whereby:
. .. ~, . .
1~41~ -Fig. 1 shows a longitudinal section of the valve, Fig. 2 shows an enlarged illustration of a constructional unit consisting of cover plates, distance pieces and the control plate with a larger-scale detail, shown in Fig. 2A.
Fig. 3 shows a section in accordance with the line s-B
of Fig. 2, and Fig. 4 shows a section in accordance with the line A-A
of Fig. 2.
The stationary external cover plates are designated in the figures with 3, and the distance pieces witn 4.
As can be seen, the cover plates 3 and the distance pieces 4 together form a receptacle chamber for a moving control plate 5. As is particularly obvious from the detail enlargement, a lamination 6 is located between the distance pieces 4 and the cover plates 3 in order to form a defined gap 7 between the control plate 5 and the cover plates 3. The distance pieces 4 and the control plate 5 were processed together in a common workpiece for plane-parallelity, each being of the same thickness. The lamination 6 comprises a cement with particles 8 of a defined size, this size corresponding to the gap 7 (1.5 - 2 ~m), such that the particles have a maximum cross-sectional dimension less than or equal to the size of the gap 7 as shown in Fig. 2A.
The components 3 and 4 thus cemented together form, with the control plate, a proper construction unit ready for testing and assembly. As is fur~her demonstrated, the cover plates 3 and the distance pieces 4 are additionally connected together by means of centering pins 9. The distance pieces 4 and the control plate 5 were manufactured from one single plane-parallel piece of uniform thickness. setween the distance pieces and 41(~7 the control plate, separating grooves were preformed on the single-piece sintered material, and the subsequent cutting process could be carried out without great expense by means of saws or laser cutting.
As regards the mode of operation of the embodiment shown in Fig. 1, the following may be said:
The unit shown by way of example is a three-way brake valve, whereby the third connection is located at the flange face 10 on the right hand side. With the control plate 5 in mid-position, both the high-pressure side P and the return from the valve chamber to the tank are shut off. If the control plate 5 is moved to the right, the pressure medium flows into the chamber and passes from there to the consumer. If, on the other hand, the control plate is moved to the left, the oil received by the consumer can be fed back into the tank.
This objective has been successfully achieved owing to the fact that the distance pieces and the control plate are plane-parallel and each of the same thickness, and that between the distance pieces and the cover plates is located a lamination for forming a defined gap between the control plate and the cover plates.
According to one design feature of the invention, the lamination consists of an adhesive with particles of a defined size having a maximum cross-sectional dimension less than or equal to the requisite size of the gap between the control plate and the cover plates, whereby the components thus cemented together and the control plate form a proper constructional element ready for assembly. According to a further development of the invention, the cover plates, the distance pieces and the control plate are all manufactured from a ceramic material. Finally, as a further distinguishing feature, claim is laid to a process for manufacturing a valve in accordance with the invention, according to which process the distance pieces and the control plate are manufactured from one single piece which has been processed such that it is plane-paralled and thus of uniform thickness, the distance pieces and the control plate being subsequently separated from one another.
The lamination which forms the gap can be produced in various ways. Coating on the distance pieces and/or the cover plates are conceivable. In the case of a coating on the cover plates, masks are required in the operating range lZ~41(~7 :.```~
coating is applied in these areas. In the case of an ,-alternative coating means for the distance pieces, correlation between the control plate and the distance -pieces which come from a common processed piece must be ensured as the distance pieces or control plates from other workpieces may differ considerably in dimension, something which, incidentally, is quite permissible. A combination of distance pieces and control plates which were not subjected to this common i-~
process must, therefore, be avoided for the reasons mentioned. t`
A cement layer in accordance with the invention,which -cements the distance pieces and the cover plates together, has proved particularly advantageous. The cement lamination, once set, absorbs the forces resulting from the subsequent pressure loading on the cover plates. The resistance to pressure of these cement laminations is quite considerable as they are kept within the range of 0.5 - 2 microns, producing a total gap at the controlp~e of approx. 1 - 4 microns depending upon the~dcfincd ci~o of the particles added to the cement. The components thus cemented together can, if the cover plates are metallic and, at the same time, constitute the valve body, be bolted together after the cement has set. During the setting process, only moderate force may be applied for displacing the excess cement, otherwise there is the danger of the particles being crushed. In cases where the cover plates do not also constitute the valve body, the cemented and proper constructional unit can be easily inserted into a housing. The layer forming the gap could, of course, also be manufactured by some other method. Coatings on the distance pieces or on the cover plates are also conceivable in the form of chemical or electro-plating deposits, and also deposits formed in the so-called PVD and CVD processes.
A ` -~4 . , .
41C~
of the control plate so that no coating is applied in these areas. In the case of an alternative coating means for the distance pieces, correlation between the control plate and the distance pieces which come from a common processed piece must be ensured as the distance pieces or control plates from other workpieces may differ considerably in dimension, something which, incidentally, is quite permissible. A
combination of distance pieces and control plates which were not subjected to this common process must, therefore, be avoided for the reasons mentioned.
A cement layer in accordance with the invention, which cements the distance pieces and the cover plates together, has proved particularly advantageous. The cement lamination, once set, absorbs the forces resulting from the subsequent pressure loading on the cover plates. The resistance to pressure of these cement laminations is quite considerable as they are kept within the range 0.5 - 2 microns, producing a total gap at the control plate of approx. 1 - 4 microns depending upon the maximum cross sectional dimension of the particles added to the cement. The components thus cemented together can, if the cover plates are metallic and, at the same time, constitute the valve body, be bolted together after the cement has set.
During the setting process, only moderate force may be applied for displacing the excess cement, otherwise there is the danger of the particles being crushed. In cases where the cover plates do not also constitute the valve body, the cemented and proper constructional unit can be easily inserted into a housing.
The layer forming the gap could, of course, also be manufactured by some other method. Coatings on the distance pieces or on the cover plates are also conceivable in the form of chemical or electro-plating deposits, and also deposits formed in the so-called PVD and CVD processes.
_ 4 _ 1 ~54 10 7 A valve according to the invention of wafer construction can, in contrast to piston valves, be simply manufactured owing to the flat, undercut-free shape of the plates and distance pieces, employing sintered materials which are processed by pressing, firing and subsequent flat working. Of particular interest in this connection is the applicability of aluminium oxide ceramics or other ceramics. These materials undergo little or no wear owing to their considerable hardness, and can be manufactured cheaply with flat surfaces of very low peak-to-valley values. The surface quality depends upon the required gap tolerance. Where tolerances are close, the peak-to-valley height can be easily maintained below Ra = 0.1 ~m. In the event that the distance pieces and the control plate are, in accordance with the invention, manufactured from a single piece which has been processed for plane-parallelity with uniform thickness throughout, the subsequent separation of the components from one another can be carried out by means of saws or laser cutting. No distortion of the components will take place owing to the sintered structure which is completely - stress-free.
A valve in accordance with the invention is, of course, suitable for other applications apart from the hydraulics sector. For example, applications in pneumatic systems, and particularly high-pressure pneumatic systems is quite conceivable. Likewise, a valve of this kind can also be employed as a mixer valve for the sanitary valves and fittings sector.
The drawing illustrates the subject matter in the form of an example embodiment as a multi-directional high-pressure gate valve, whereby:
. .. ~, . .
1~41~ -Fig. 1 shows a longitudinal section of the valve, Fig. 2 shows an enlarged illustration of a constructional unit consisting of cover plates, distance pieces and the control plate with a larger-scale detail, shown in Fig. 2A.
Fig. 3 shows a section in accordance with the line s-B
of Fig. 2, and Fig. 4 shows a section in accordance with the line A-A
of Fig. 2.
The stationary external cover plates are designated in the figures with 3, and the distance pieces witn 4.
As can be seen, the cover plates 3 and the distance pieces 4 together form a receptacle chamber for a moving control plate 5. As is particularly obvious from the detail enlargement, a lamination 6 is located between the distance pieces 4 and the cover plates 3 in order to form a defined gap 7 between the control plate 5 and the cover plates 3. The distance pieces 4 and the control plate 5 were processed together in a common workpiece for plane-parallelity, each being of the same thickness. The lamination 6 comprises a cement with particles 8 of a defined size, this size corresponding to the gap 7 (1.5 - 2 ~m), such that the particles have a maximum cross-sectional dimension less than or equal to the size of the gap 7 as shown in Fig. 2A.
The components 3 and 4 thus cemented together form, with the control plate, a proper construction unit ready for testing and assembly. As is fur~her demonstrated, the cover plates 3 and the distance pieces 4 are additionally connected together by means of centering pins 9. The distance pieces 4 and the control plate 5 were manufactured from one single plane-parallel piece of uniform thickness. setween the distance pieces and 41(~7 the control plate, separating grooves were preformed on the single-piece sintered material, and the subsequent cutting process could be carried out without great expense by means of saws or laser cutting.
As regards the mode of operation of the embodiment shown in Fig. 1, the following may be said:
The unit shown by way of example is a three-way brake valve, whereby the third connection is located at the flange face 10 on the right hand side. With the control plate 5 in mid-position, both the high-pressure side P and the return from the valve chamber to the tank are shut off. If the control plate 5 is moved to the right, the pressure medium flows into the chamber and passes from there to the consumer. If, on the other hand, the control plate is moved to the left, the oil received by the consumer can be fed back into the tank.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Straightway or multi-directional control valve of wafer construction, comprising at least two stationary external cover plates, between which one or several distance pieces are located in order to create a receptacle chamber for a moving control plate, the thickness of which is less than the clear distance between the cover plates, said valve being c h a r a c t e r i z e d b y t h e f a c t t h a t the distance pieces and the control plate are plane-parallel and each of the same thickness, and that between the distance pieces and the cover plates is located a lamination for forming a defined gap between the control plates and the cover plates.
2. Valve in accordance with Claim 1, c h a r a c t e r i z e d b y t h e f a c t t h a t the lamination consists of a cement with particles having a maximum cross-sectional dimension less than or equal to the required size of the gap between the control plate and the cover plates and that the cover plates and distance pieces thus cemented together form, together with the control plate, a proper constructional unit ready for testing and assembly.
3. Valve in accordance with Claim 1, c h a r a c t e r i z e d b y t h e f a c t t h a t the cover plates, the distance pieces and the control plate are manufactured from a ceramic material.
4. Process for manufacturing a valve in accordance with claims 1, 2 or 3 c h a r a c t e r i z e d b y t h e f a c t t h a t the distance pieces and the control plate are manufactured from a single piece which has been processed for plane-parallelity and which features uniform thickness throughout, whereby the distance pieces and control plate are subsequently separated from one another.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3347135A DE3347135C2 (en) | 1983-12-27 | 1983-12-27 | Straight or multi-way valve in plate design |
| DEP3347135.5 | 1983-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1254107A true CA1254107A (en) | 1989-05-16 |
Family
ID=6218190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000464033A Expired CA1254107A (en) | 1983-12-27 | 1984-09-26 | Straightway or multi-directional control valve of wafer construction |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0147562B1 (en) |
| JP (1) | JPS60139978A (en) |
| KR (1) | KR850005080A (en) |
| AU (1) | AU3262284A (en) |
| BR (1) | BR8405185A (en) |
| CA (1) | CA1254107A (en) |
| DE (2) | DE3347135C2 (en) |
| GB (1) | GB2152196B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3620818A1 (en) * | 1986-06-21 | 1987-12-23 | Asys Gmbh Ges Fuer Die Herstel | SOLENOID VALVE FOR LIQUID AND GASEOUS MEDIA |
| DE3731754A1 (en) * | 1987-09-22 | 1989-04-20 | B & S Metalpraecis Gmbh | THREE-WAY FITTING |
| DE3890961T1 (en) * | 1987-11-10 | 1989-12-21 | Masco Corp | A PAIR OF SEALING BODIES MADE OF HARD MATERIAL WITH A LOW FRICTION COEFFICIENT |
| IT1211509B (en) * | 1987-11-10 | 1989-11-03 | Gevipi Ag | PAIR OF SEALING BODIES IN HARD MATERIAL WITH LOW FRICTION COEFFICIENT |
| DE3926846A1 (en) * | 1989-08-15 | 1991-02-21 | Hauhinco Maschf | Piston slide valve for water hydraulics - makes use of ceramic for piston and housing bush |
| DE102005042040B3 (en) | 2005-09-02 | 2007-05-16 | Fresenius Medical Care De Gmbh | gear pump |
| DE102007035775B4 (en) | 2007-07-27 | 2016-07-21 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Pilot operated valve with ceramic control piston |
| DE102012108711A1 (en) * | 2012-09-17 | 2014-03-20 | Samson Ag | Fluid technical flat slide valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2893684A (en) * | 1957-06-11 | 1959-07-07 | John L Williams | Corrosion resistant gate valve |
| GB911436A (en) * | 1958-11-27 | 1962-11-28 | Wilmot Breeden Ltd | Fluid control slide valves |
| US3069129A (en) * | 1959-07-31 | 1962-12-18 | Marvin H Grove | Valve construction having fluid pressure and spring bias seals |
| DE1211452B (en) * | 1964-01-15 | 1966-02-24 | Erich Herion | Control or multi-way spool driven by a piston |
| FR1554564A (en) * | 1965-11-24 | 1969-01-24 | ||
| DE2130773A1 (en) * | 1970-07-02 | 1972-04-13 | Iskra Zd Za Avtomatizacijo V Z | Adhesive for gluing with a precisely determined distance |
| DE2633443A1 (en) * | 1976-07-24 | 1978-01-26 | Festo Maschf Stoll G | SLIDE VALVE |
| JPS53149476A (en) * | 1977-05-31 | 1978-12-26 | Tokyo Shibaura Electric Co | Method of and device for extracting coffee or like |
| DE3150844A1 (en) * | 1981-12-22 | 1983-06-30 | Max Planck Gesellschaft zur Förderung der Wissenschaften e.V., 3400 Göttingen | Process and adhesive for bonding components |
-
1983
- 1983-12-27 DE DE3347135A patent/DE3347135C2/en not_active Expired
-
1984
- 1984-08-31 AU AU32622/84A patent/AU3262284A/en not_active Abandoned
- 1984-09-13 KR KR1019840005575A patent/KR850005080A/en not_active Application Discontinuation
- 1984-09-26 CA CA000464033A patent/CA1254107A/en not_active Expired
- 1984-10-03 JP JP59206456A patent/JPS60139978A/en active Pending
- 1984-10-15 BR BR8405185A patent/BR8405185A/en not_active IP Right Cessation
- 1984-10-25 DE DE8484112872T patent/DE3480108D1/en not_active Expired
- 1984-10-25 EP EP84112872A patent/EP0147562B1/en not_active Expired
- 1984-12-20 GB GB08432226A patent/GB2152196B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB8432226D0 (en) | 1985-01-30 |
| EP0147562A3 (en) | 1987-05-27 |
| DE3347135A1 (en) | 1985-07-11 |
| DE3347135C2 (en) | 1986-04-03 |
| EP0147562A2 (en) | 1985-07-10 |
| GB2152196B (en) | 1986-10-15 |
| GB2152196A (en) | 1985-07-31 |
| DE3480108D1 (en) | 1989-11-16 |
| JPS60139978A (en) | 1985-07-24 |
| EP0147562B1 (en) | 1989-10-11 |
| KR850005080A (en) | 1985-08-21 |
| BR8405185A (en) | 1985-08-13 |
| AU3262284A (en) | 1985-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |