CA1276925C - Sealing device for throttle valves - Google Patents
Sealing device for throttle valvesInfo
- Publication number
- CA1276925C CA1276925C CA000488303A CA488303A CA1276925C CA 1276925 C CA1276925 C CA 1276925C CA 000488303 A CA000488303 A CA 000488303A CA 488303 A CA488303 A CA 488303A CA 1276925 C CA1276925 C CA 1276925C
- Authority
- CA
- Canada
- Prior art keywords
- slot
- sealing ring
- legs
- sealing
- pair
- 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 - Lifetime
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to a sealing device for such throttle valves as comprise a valve housing with a valve seat and a pivotally mounted throttle member which may be pressed against the valve seat to bring about a sealing contact between two interacting sealing surfaces, one on the throttle member and the other in the valve housing and a sealing ring to be mounted in a slot in the valve. The invention is characterized in that the sealing ring has a cross-section of a homogeneous, ra-dially elongated body part of considerable rigidity and resistance to radial deformation, that said body part at its head end has a sealing surface which is one of the two said sealing surfaces, and that from the "hip"
part of the said homogeneous body part extend two essen-tially radial legs, which form flanges of the sealing ring, said flanges being arranged to be pressed axially against the walls of said slot.
The invention relates to a sealing device for such throttle valves as comprise a valve housing with a valve seat and a pivotally mounted throttle member which may be pressed against the valve seat to bring about a sealing contact between two interacting sealing surfaces, one on the throttle member and the other in the valve housing and a sealing ring to be mounted in a slot in the valve. The invention is characterized in that the sealing ring has a cross-section of a homogeneous, ra-dially elongated body part of considerable rigidity and resistance to radial deformation, that said body part at its head end has a sealing surface which is one of the two said sealing surfaces, and that from the "hip"
part of the said homogeneous body part extend two essen-tially radial legs, which form flanges of the sealing ring, said flanges being arranged to be pressed axially against the walls of said slot.
Description
zs The invention relates to a sealing device for sucn throttle valves as comprise a valve housing with a valve seat and a pivotally movable throttle member which may be pressed against the valve seat to bring about a sealing contact between two interacting sealing surfaces, one on the throttle member and the other in the valve housing and a seaiing ring to be mounted in a slot in the valve.
A sealing device of the type referred to in the preamble is known for instance from US-A-4 284 264. This known device comprises a homogeneous sealing ring intended to be mounted in a slot in the valve housing. The valve ring cross-section is an elongated flat body. The ring normally consists of metal and is considerably rigid with respect to deformation in the radial direction. The ring may, however, be bent aside by the throttle, when the thro-ttle is pressed against the sealing ring. The inner, bluntly rounded edge of the ring constitutes the second sealing surface referred to above. A pair of spring washers are pressed against the two flat sides of the sealing ring, and between these two washers is formed the slot in which the sealing ring is mounted. The spring washers are in turn arranged between the valve housing and a mounting ring, gaskets being placed between the latter parts and the spring washers. Although this known device has several positive qualities compared to prior art and has signified a substantial improvement within this particular field, the two spring washers and the gaskets do constitute a complication.
From for instance US-A-3 080 145 and US-A-4 058 290 the use of sealing washers with a U-shaped section is known for throttle valves with metallic sealing. In comparison with US-A-4 284 264 these have the advantage of being uncomplicated and not requiring separate gaskets.
On the other hand, they have a low rigidity and resistance to radial deformation, which is unsatisfactory at least for some applications.
~' ~ :~76~5 ~he object of the invention is to provide an improved sealing device for throttle valves of the type referred to in the preambule. In particular, an object is to eliminate -the disadvangage listed above of prior art sealing devices for throt-tle valves.
According to the present invention, there is provided a sealing device for a throttle valve, comprising a valve housing with a valve seat and a pivotally mounted throttle member, said throttle member being arranged to be pressed against the valve seat to provide a sealing between two in-teracting sealing surfaces, one of said surfaces being on the throttle member, and a sealing ring, said ring being arranged to be mounted in a slot Eormed in the valve housing; sealing device wherein the sealing ring has a cross-section shaped as a homogeneous, radially elongated body par-t presenting considerable rigidity and resistance to radial deformation, said body part having a head end comprising a sealing surface which constitutes the other surface of said two sealing surfaces, said ho-mogeneous body part comprising a peripheral part from which two essentially radial legs extend, said radial legs forming flanges oE the sealing ring, said flanges being arranged to be pressed axially against the walls of said slot.
According to the present invention, there is provided in a throttle valve comprising a valve housing with a substantially annular valve seat, having a first sealing surface, and a throttle member having a second sealing surface, pivotally mounted in said valve housing so as to have said second sealing surface pressed into engagement with said first sealing surface when said valve is closed; said valve seat consisting essentially o-E
a substantially annular slot, having an axis, an axial width, an inner diameter and an outer diameter, formed ~;' ~ ;~76~ZS
- 2a -in said valve housing and an annular sealing ring, having an axial width, disposed within said slot, said slot having a pair of axially spaced apart side walls and a bottom wall forming the outer diameter of said an-nular slot, said sealing ring slidably engaging said pairof side walls; an improvement comprising: said sealing ring comprising an annular member having a substantially Y-shaped cross~section formed by a pair of, spaced apart, parallel legs forming a radially outward extension con-joined by a radially inward extending head portion havinga radially inward extension; each of said legs at their free end having a flange portion extending axially away from the other leg of said pair of legs; said head portion having a rounded portion at its free end, said rounded portion forming said first sealing surface; said radial inward extension of said head portion being at least equal to said radial outward extension of said pair of legs;
said sealing ring being formed of a resilient material to afford said head portion of considerable rigidity and resistance to radial deformation and to cause said pair of legs to spring axially outwardly against said side walls; sai.d outer diameter of said slot being greater than the outer diame-ter of said sealing ring as defined by the free ends of said legs and said inner diameter of said slot being greater than said inner diameter of said sealing ring as defined by the rounded portion of the head portion such that when said sealing ring is cen-tered on the axis of said slot said free ends of said legs are radially spaced apart from said bottom wall and said rounded portion of said head portion protrudes from said slot; said axial width of said sealing ring is great-er across said pair of legs than across said head por-tion; and said axial width of said slot is greater prox-imate said pair of legs of said sealing ring than prox-,~
~.27~25 - 2b -imate said head portion of said sealing ring.
Further advantages and characteristics of the invention will become apparent from the appended claims and the following description of a preferred embodiment.
In the following description reference will be made to the drawing figure, which shows an axial sec-tion of a throttle valve with a sealing device according to the invention. The valve comprises a valve housing 1 with a main part and a cover ring 3; a pivotally moun-ted throttle 4; and a sealing ring 5 in an annular slot 6 in the valve housing be-tween the main part 2 and the cover ring 3. The throttle 4 has a sealing surface 7, which according to this embodiment is of the same configuration as in US - A - 4,284,264. The sealing device according to the invention is not limited, however, to be used with this throttle configuration.
The sealing ring 5 normally consists of stain-less, acid-proof steel; an alternative is a very stiff plastic material. It is also conceivable that the ring 5 consists of a composite material or is composed of sev-eral materials. The ring 5 has a section which has a ~`
Z~
"creature"-resembling configuration with an elongated body part 8. The two sides 9, 10 of the body part 8 are completely flat and parallel.
At that end 7 of the ring, which is directed toward the throttle member, the body part 8 is transfigurated directly into a "head" part 11 with a bluntly rounded surface 12, which constitutes the first sealing surface of the valve, against which the sealing surface 7 of the throttle 4 may be pressed.
From the "hip" 13 of the body part 8, i.e. from the peripheral part of the homogeneous part of the ring 5, a pair of annular flanges 14, 15 ex~end radially, symmetrically outwards. In the section illustrated, the flanges 14 and 15 form the legs of the creature-resembling figure.
On thé legs 14, 15 there extend a pair of feet 16, 17, each being an outwardly pointing ledge on the respective flanges 14, 15. The feet/ledges 16, 17 are pressed by spring action of the legs/flanges 14, 15 against the walls 18 and 19, respectively, of the slot 6. The configuration of the ring 5 ensures the desired combination of radial rigidity, axial flexibility, and sealing ability against the two walls 18, 19 of the slot 6. The ring 5 by itself is stiff enough, which means that the two legs/flanges 14, 15 need not "brace their feet" 16, 17 against the bottom 20 of the slot 6. On the contrary, the slot 6 is so deep that the ring 5 may be displaced radially, i.e. the diameter of the slot 6 is greater than the outer diameter of the ring 5. The position of the~ring 5 is thus adaptable to the throttle 4 when the valve is first closed. During this adaptation, the feet/ledges 16, 17 will slide against the parallel radial walls 18, 19 of the slot 6 without losing their sealing contact with them.
.
,.,:
.. ..
A sealing device of the type referred to in the preamble is known for instance from US-A-4 284 264. This known device comprises a homogeneous sealing ring intended to be mounted in a slot in the valve housing. The valve ring cross-section is an elongated flat body. The ring normally consists of metal and is considerably rigid with respect to deformation in the radial direction. The ring may, however, be bent aside by the throttle, when the thro-ttle is pressed against the sealing ring. The inner, bluntly rounded edge of the ring constitutes the second sealing surface referred to above. A pair of spring washers are pressed against the two flat sides of the sealing ring, and between these two washers is formed the slot in which the sealing ring is mounted. The spring washers are in turn arranged between the valve housing and a mounting ring, gaskets being placed between the latter parts and the spring washers. Although this known device has several positive qualities compared to prior art and has signified a substantial improvement within this particular field, the two spring washers and the gaskets do constitute a complication.
From for instance US-A-3 080 145 and US-A-4 058 290 the use of sealing washers with a U-shaped section is known for throttle valves with metallic sealing. In comparison with US-A-4 284 264 these have the advantage of being uncomplicated and not requiring separate gaskets.
On the other hand, they have a low rigidity and resistance to radial deformation, which is unsatisfactory at least for some applications.
~' ~ :~76~5 ~he object of the invention is to provide an improved sealing device for throttle valves of the type referred to in the preambule. In particular, an object is to eliminate -the disadvangage listed above of prior art sealing devices for throt-tle valves.
According to the present invention, there is provided a sealing device for a throttle valve, comprising a valve housing with a valve seat and a pivotally mounted throttle member, said throttle member being arranged to be pressed against the valve seat to provide a sealing between two in-teracting sealing surfaces, one of said surfaces being on the throttle member, and a sealing ring, said ring being arranged to be mounted in a slot Eormed in the valve housing; sealing device wherein the sealing ring has a cross-section shaped as a homogeneous, radially elongated body par-t presenting considerable rigidity and resistance to radial deformation, said body part having a head end comprising a sealing surface which constitutes the other surface of said two sealing surfaces, said ho-mogeneous body part comprising a peripheral part from which two essentially radial legs extend, said radial legs forming flanges oE the sealing ring, said flanges being arranged to be pressed axially against the walls of said slot.
According to the present invention, there is provided in a throttle valve comprising a valve housing with a substantially annular valve seat, having a first sealing surface, and a throttle member having a second sealing surface, pivotally mounted in said valve housing so as to have said second sealing surface pressed into engagement with said first sealing surface when said valve is closed; said valve seat consisting essentially o-E
a substantially annular slot, having an axis, an axial width, an inner diameter and an outer diameter, formed ~;' ~ ;~76~ZS
- 2a -in said valve housing and an annular sealing ring, having an axial width, disposed within said slot, said slot having a pair of axially spaced apart side walls and a bottom wall forming the outer diameter of said an-nular slot, said sealing ring slidably engaging said pairof side walls; an improvement comprising: said sealing ring comprising an annular member having a substantially Y-shaped cross~section formed by a pair of, spaced apart, parallel legs forming a radially outward extension con-joined by a radially inward extending head portion havinga radially inward extension; each of said legs at their free end having a flange portion extending axially away from the other leg of said pair of legs; said head portion having a rounded portion at its free end, said rounded portion forming said first sealing surface; said radial inward extension of said head portion being at least equal to said radial outward extension of said pair of legs;
said sealing ring being formed of a resilient material to afford said head portion of considerable rigidity and resistance to radial deformation and to cause said pair of legs to spring axially outwardly against said side walls; sai.d outer diameter of said slot being greater than the outer diame-ter of said sealing ring as defined by the free ends of said legs and said inner diameter of said slot being greater than said inner diameter of said sealing ring as defined by the rounded portion of the head portion such that when said sealing ring is cen-tered on the axis of said slot said free ends of said legs are radially spaced apart from said bottom wall and said rounded portion of said head portion protrudes from said slot; said axial width of said sealing ring is great-er across said pair of legs than across said head por-tion; and said axial width of said slot is greater prox-imate said pair of legs of said sealing ring than prox-,~
~.27~25 - 2b -imate said head portion of said sealing ring.
Further advantages and characteristics of the invention will become apparent from the appended claims and the following description of a preferred embodiment.
In the following description reference will be made to the drawing figure, which shows an axial sec-tion of a throttle valve with a sealing device according to the invention. The valve comprises a valve housing 1 with a main part and a cover ring 3; a pivotally moun-ted throttle 4; and a sealing ring 5 in an annular slot 6 in the valve housing be-tween the main part 2 and the cover ring 3. The throttle 4 has a sealing surface 7, which according to this embodiment is of the same configuration as in US - A - 4,284,264. The sealing device according to the invention is not limited, however, to be used with this throttle configuration.
The sealing ring 5 normally consists of stain-less, acid-proof steel; an alternative is a very stiff plastic material. It is also conceivable that the ring 5 consists of a composite material or is composed of sev-eral materials. The ring 5 has a section which has a ~`
Z~
"creature"-resembling configuration with an elongated body part 8. The two sides 9, 10 of the body part 8 are completely flat and parallel.
At that end 7 of the ring, which is directed toward the throttle member, the body part 8 is transfigurated directly into a "head" part 11 with a bluntly rounded surface 12, which constitutes the first sealing surface of the valve, against which the sealing surface 7 of the throttle 4 may be pressed.
From the "hip" 13 of the body part 8, i.e. from the peripheral part of the homogeneous part of the ring 5, a pair of annular flanges 14, 15 ex~end radially, symmetrically outwards. In the section illustrated, the flanges 14 and 15 form the legs of the creature-resembling figure.
On thé legs 14, 15 there extend a pair of feet 16, 17, each being an outwardly pointing ledge on the respective flanges 14, 15. The feet/ledges 16, 17 are pressed by spring action of the legs/flanges 14, 15 against the walls 18 and 19, respectively, of the slot 6. The configuration of the ring 5 ensures the desired combination of radial rigidity, axial flexibility, and sealing ability against the two walls 18, 19 of the slot 6. The ring 5 by itself is stiff enough, which means that the two legs/flanges 14, 15 need not "brace their feet" 16, 17 against the bottom 20 of the slot 6. On the contrary, the slot 6 is so deep that the ring 5 may be displaced radially, i.e. the diameter of the slot 6 is greater than the outer diameter of the ring 5. The position of the~ring 5 is thus adaptable to the throttle 4 when the valve is first closed. During this adaptation, the feet/ledges 16, 17 will slide against the parallel radial walls 18, 19 of the slot 6 without losing their sealing contact with them.
.
,.,:
.. ..
Claims
1. In a throttle valve comprising a valve housing with a substantially annular valve seat, having a first sealing surface, and a throttle member having a second sealing surface, pivotally mounted in said valve housing so as to have said second sealing surface pressed into engagement with said first sealing surface when said valve is closed; said valve seat consisting essentially of a substantially annular slot, having an axis, an axial width, an inner diameter and an outer diameter, formed in said valve housing and an annular sealing ring, having an axial width, disposed within said slot, said slot having a pair of axially spaced apart side walls and a bottom wall forming the outer diameter of said annular slot, said sealing ring slidably engaging said pair of side walls; the improvement comprising: said sealing ring comprising an annular member having a substantially Y-shaped cross-section formed by a pair of radially outwardly extending, spaced apart, parallel legs conjoined by a radially inward extending head portion;
each of said legs at their free end having a flange portion extending axially away from the other of said pair of legs;
said head portion having a rounded portion at its free end, said rounded portion forming said first sealing surface;
said radial inward extension of said head portion being at least equal to said radial outward extension of said pair of legs; said sealing ring being formed of a resilient material to afford a head portion of considerable rigidity and resistance to radial deformation and to cause said pair of legs to spring axially outwardly against side walls; said outer diameter of said slot being greater than the outer diameter of said sealing ring as defined by the free ends of said legs and said inner diameter of said slot being greater than said inner diameter of said sealing ring as defined by the rounded portion of the head portion such that when said sealing ring is centered on the axis of said slot said free ends of said legs are radially spaced apart from said bottom wall and said rounded portion of said head portion protrudes from said slot; said axial width of said sealing ring is greater across said pair of legs than across said head portion; and said axial width of said slot is greater proximate said pair of legs of said sealing ring than proximate said head portion of said sealing ring.
each of said legs at their free end having a flange portion extending axially away from the other of said pair of legs;
said head portion having a rounded portion at its free end, said rounded portion forming said first sealing surface;
said radial inward extension of said head portion being at least equal to said radial outward extension of said pair of legs; said sealing ring being formed of a resilient material to afford a head portion of considerable rigidity and resistance to radial deformation and to cause said pair of legs to spring axially outwardly against side walls; said outer diameter of said slot being greater than the outer diameter of said sealing ring as defined by the free ends of said legs and said inner diameter of said slot being greater than said inner diameter of said sealing ring as defined by the rounded portion of the head portion such that when said sealing ring is centered on the axis of said slot said free ends of said legs are radially spaced apart from said bottom wall and said rounded portion of said head portion protrudes from said slot; said axial width of said sealing ring is greater across said pair of legs than across said head portion; and said axial width of said slot is greater proximate said pair of legs of said sealing ring than proximate said head portion of said sealing ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8404833-9 | 1984-09-27 | ||
| SE8404833A SE445382B (en) | 1984-09-27 | 1984-09-27 | GAS VALVE SEALING DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1276925C true CA1276925C (en) | 1990-11-27 |
Family
ID=20357147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000488303A Expired - Lifetime CA1276925C (en) | 1984-09-27 | 1985-08-08 | Sealing device for throttle valves |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4634097A (en) |
| EP (1) | EP0176687B1 (en) |
| JP (1) | JP2528816B2 (en) |
| AT (1) | ATE57426T1 (en) |
| AU (1) | AU574491B2 (en) |
| BR (1) | BR8504281A (en) |
| CA (1) | CA1276925C (en) |
| DE (1) | DE3580087D1 (en) |
| FI (1) | FI82128C (en) |
| NO (1) | NO159617C (en) |
| SE (1) | SE445382B (en) |
| ZA (1) | ZA856570B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2606484B1 (en) * | 1986-11-12 | 1989-03-24 | Coyard Expl Ets E R | BUTTERFLY VALVE |
| SE456112C (en) * | 1987-01-02 | 1996-04-11 | Somas Ventiler | Butterfly Valve |
| EP0822358B1 (en) * | 1996-07-31 | 2003-04-09 | Ksb S.A.S | Long life centric butterfly valve |
| FR2752033B1 (en) * | 1996-07-31 | 1998-09-11 | Ksb Sa | RIGID SEALING TAP |
| US6328054B1 (en) * | 2000-07-07 | 2001-12-11 | Parker-Hannifin Corporation-Veriflo Division | Balanced fluid pressure regulator |
| DE10060004B4 (en) * | 2000-12-02 | 2005-08-25 | Warex Valve Gmbh | Shut-off device with a pivoting rotary flap and an entropy-elastic ring seal held on a support ring |
| US6981435B2 (en) * | 2003-05-08 | 2006-01-03 | Chih-Ching Hsien | Ratchet wrench having a sealing structure |
| DE102006045420A1 (en) * | 2006-09-26 | 2008-04-10 | Pierburg Gmbh | Throttle valve device for an internal combustion engine |
| FR2922988B1 (en) | 2007-10-31 | 2012-10-12 | Saint Gobain Performance Plast | PIPE ASSEMBLIES |
| FR2922984B1 (en) * | 2007-10-31 | 2013-09-27 | Saint Gobain Performance Plast | VALVE HAVING RIGID SEAL |
| US8348236B2 (en) * | 2007-10-31 | 2013-01-08 | Saint-Gobain Performance Plastics Corporation | Butterfly valve with a rigid seal |
| DE102014222517A1 (en) * | 2014-11-04 | 2016-05-04 | Continental Automotive Gmbh | Valve device for a motor vehicle |
| FR3067783B1 (en) * | 2017-06-20 | 2020-09-04 | Ksb Sas | CENTER BUTTERFLY VALVE |
| CN114791064A (en) * | 2021-01-26 | 2022-07-26 | 中国航发商用航空发动机有限责任公司 | Throttling assembly |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3080145A (en) * | 1957-10-24 | 1963-03-05 | David F Wiseman & Sons Ltd | Butterfly valves |
| US3029063A (en) * | 1958-08-29 | 1962-04-10 | Alfred M Moen | Butterfly valve |
| DE1247104B (en) * | 1960-07-18 | 1967-08-10 | Marvin Henry Grove | Sealing ring |
| FI54536C (en) * | 1975-04-15 | 1978-12-11 | Neles Oy | KLAFFVENTIL |
| AU506099B2 (en) * | 1976-02-25 | 1979-12-13 | Macawber Engineering | Rotary valve for abrasive materials |
| US4294283A (en) * | 1977-11-25 | 1981-10-13 | Scharres Harry J | Wedge sealed damper |
| NO152308C (en) * | 1978-11-17 | 1985-09-04 | Somas Ventiler | Butterfly Valves |
| US4254937A (en) * | 1978-11-17 | 1981-03-10 | Aktiebolaget Somas Ventiler | Butterfly valve |
| US4284264A (en) * | 1980-01-17 | 1981-08-18 | Aktiebolaget Somas Ventiler | Butterfly valves |
| US4378104A (en) * | 1980-12-31 | 1983-03-29 | Edison International, Inc. | Fluid-pressure-loaded seal for butterfly valves |
| US4372530A (en) * | 1981-06-05 | 1983-02-08 | Quartrol Corporation | Valve and seal |
-
1984
- 1984-09-27 SE SE8404833A patent/SE445382B/en not_active IP Right Cessation
-
1985
- 1985-07-24 AT AT85109274T patent/ATE57426T1/en not_active IP Right Cessation
- 1985-07-24 DE DE8585109274T patent/DE3580087D1/en not_active Expired - Lifetime
- 1985-07-24 EP EP85109274A patent/EP0176687B1/en not_active Expired - Lifetime
- 1985-07-29 US US06/759,852 patent/US4634097A/en not_active Expired - Lifetime
- 1985-07-31 FI FI852962A patent/FI82128C/en not_active IP Right Cessation
- 1985-08-06 AU AU45808/85A patent/AU574491B2/en not_active Expired
- 1985-08-08 CA CA000488303A patent/CA1276925C/en not_active Expired - Lifetime
- 1985-08-14 NO NO853197A patent/NO159617C/en not_active IP Right Cessation
- 1985-08-28 ZA ZA856570A patent/ZA856570B/en unknown
- 1985-08-28 JP JP60187553A patent/JP2528816B2/en not_active Expired - Lifetime
- 1985-09-04 BR BR8504281A patent/BR8504281A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU4580885A (en) | 1986-04-10 |
| AU574491B2 (en) | 1988-07-07 |
| JPS6182077A (en) | 1986-04-25 |
| SE8404833D0 (en) | 1984-09-27 |
| FI852962L (en) | 1986-03-28 |
| EP0176687A3 (en) | 1987-06-24 |
| EP0176687A2 (en) | 1986-04-09 |
| FI82128C (en) | 1991-01-10 |
| ZA856570B (en) | 1986-04-30 |
| BR8504281A (en) | 1986-06-17 |
| NO159617B (en) | 1988-10-10 |
| FI852962A0 (en) | 1985-07-31 |
| NO159617C (en) | 1989-01-18 |
| FI82128B (en) | 1990-09-28 |
| JP2528816B2 (en) | 1996-08-28 |
| SE8404833L (en) | 1986-03-28 |
| SE445382B (en) | 1986-06-16 |
| ATE57426T1 (en) | 1990-10-15 |
| NO853197L (en) | 1986-04-01 |
| DE3580087D1 (en) | 1990-11-15 |
| EP0176687B1 (en) | 1990-10-10 |
| US4634097A (en) | 1987-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |