US20070164248A1 - Valves - Google Patents
Valves Download PDFInfo
- Publication number
- US20070164248A1 US20070164248A1 US11/710,946 US71094607A US2007164248A1 US 20070164248 A1 US20070164248 A1 US 20070164248A1 US 71094607 A US71094607 A US 71094607A US 2007164248 A1 US2007164248 A1 US 2007164248A1
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- US
- United States
- Prior art keywords
- valve
- obturator
- housing
- guide
- guide shoe
- 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.)
- Abandoned
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Classifications
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- 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
- F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
- F16K43/008—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose the main valve having a back-seat position, e.g. to service the spindle sealing
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- 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
- F16K3/0263—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 using particular material or covering means
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- 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
- F16K3/30—Details
- F16K3/316—Guiding of the slide
Definitions
- the invention relates to valves and particularly, though not exclusively, to gate valves.
- a typical gate valve comprises a valve housing and an obturator movable in the housing between open and closed positions.
- a valve comprising a valve housing, a valve member slidable in the valve housing between open and closed positions, and means to reduce friction between the valve member and the valve housing.
- low friction slide surfaces are provided on the obturator of a gate valve.
- the obturator is encapsulated in or made from elastomeric material to provide resistance to corrosion, the low friction sliding surfaces being provided externally of the elastomeric material.
- elastomeric material it is generally desirable to have elastomeric material to provide corrosion protection but elastomeric material generally has a high coefficient of friction resulting in high friction drag and high operating forces.
- the low friction sliding surfaces may be provided by at least one guide shoe made of low friction material, and attachable to the obturator.
- Each shoe is preferably attachable to the obturator by inserting the shoe into a slot in the obturator.
- each slot is closed at its upper and lower ends, trapping the guide shoe within the slot such that vertical movement of the guide shoe with respect to the obturator is substantially prevented.
- Each guide shoe may be a press fit in the associated slot.
- Each guide shoe may be provided with ridges which dig into the elastomeric material of the obturator to help retain the guide shoe in the associated slot.
- the housing may be provided with parallel guide ribs extending down each side of the housing, these ribs cooperating with parallel guide channels in the guide shoes, so that the obturator is guided by cooperation of the ribs and channels, as the obturator moves between the open and closed positions.
- the ribs on the valve housing may be of metal or of metal provided with a corrosion protected coating.
- the cross section of the guide ribs is preferably rectangular, although other shapes may be used.
- the ridges on the guide shoes may be of saw tooth cross-section to make it relatively easy to insert each guide shoe into the associated slot, but relatively hard for the shoe subsequently to move out of the slot again.
- each guide shoe fits around the associated guide rib of the housing, with a sufficient clearance to allow sliding motion to take place.
- each guide shoe may be shaped to fit into a recess within the associated guide slot of the obturator.
- each guide shoe may be provided with a central rib extending along its length from the back of the shoe.
- Each recess may be coated with elastomeric material although this is not essential.
- Embodiments of the invention have the following advantages.
- a device is provided for reducing the operating force in a gate valve.
- the device is made from low friction material.
- the device may be made from plastics material.
- Acetal plastics may be used.
- the device may be used with an obturator encapsulated in or made from elastomeric material.
- the device may consist of at least one channel cooperating with at least one guide rib on the housing or any part of the valve.
- the device may be retained in the obturator by means of an interference fit with elastomeric material.
- the device may have ridges on its surface in contact with the elastomeric material.
- the ridges may be shaped so that the device may be inserted more easily than it can be withdrawn.
- the device may be arranged to cooperate with a recess in the obturator so that it cannot be extracted from the obturator in the direction of obturator motion.
- a valve comprising a valve housing, a valve member slidable in the valve housing between open and closed positions, a valve operating member associated with the valve member and passing out of the valve housing through an aperture, the valve having means to seal the aperture when the valve member is in the open position.
- the sealing means may comprise an auxiliary seal on the valve member which comes into sealing contact with both the valve housing and the valve operating member when the valve member is in the open position.
- auxiliary seal on the valve housing which is contacted by the valve member when the valve member is in the open position.
- auxiliary seal on the valve member and a second auxiliary seal on the valve housing, the two auxiliary seals coming into sealing contact with one another and with the valve operating member when the valve member is in the open position.
- a main seal to provide sealing contact between the valve operating member and the aperture.
- valve member When it is desired to replace or repair the main seal, the valve member may be moved into the open position, in which the auxiliary seal seals the aperture while the main seal is being replaced or repaired.
- the invention includes a valve having the features of both the first and second aspects of the invention.
- FIG. 1 is a cross sectional view of an embodiment of valve according to the invention, taken on the centre line of the valve;
- FIG. 2 is a cross-sectional view, to a larger scale, through a guide shoe of the valve shown in FIG. 1 ;
- FIG. 3 is a part cross-sectional view through an obturator of the valve, taken in the plane of the obturator;
- FIG. 4 is a side view of the obturator shown in FIG. 3 ;
- FIG. 5 is a cross-sectional view through a second embodiment of valve according to the invention, looking in the direction of flow;
- FIG. 6 is a view of the obturator of the valve shown in FIG. 5 ;
- FIG. 7 is a detailed view of part of the obturator shown in FIG. 6 .
- valves shown in FIGS. 1 to 4 has a valve housing 1 and a gate or obturator 2 moveable down into the housing 1 to close the valve, and movable back up again to open the valve.
- the obturator 2 comprises a metal casting 3 encapsulated in an elastomeric substance 4 .
- a slot 15 having a recessed portion 16 .
- the recessed portion 16 is closed at its upper 17 and lower 18 ends.
- each slot 15 Plugged into each slot 15 is a guide shoe having the cross section shown in
- FIG. 2 A central rib 12 at the rear of each guide shoe engages in the associated recess 16 and longitudinal ridges 13 , 14 dig into the elastomeric material at the sides of the associated slot 15 . This digging in tends to retain each guide shoe in its associated slot in the horizontal direction and the guide shoe cannot move out of the slot in the vertical direction because of the engagement of the upper and lower ends of the rib 12 with the upper 17 and lower 18 ends of the recessed portion 16 of the associated slot 15 .
- the housing 1 is provided with oppositely facing guide ribs 5 and 6 and, as best seen in FIG. 1 , these cooperate with the channels in the guide shoes 7 and 8 to guide the obturator between its open and closed positions.
- Each rib projects between side arms 9 and 10 of the associated guide shoe, and the inner face of each guide rib is closely adjacent to the inner face 11 of the associated guide shoe channel.
- the obturator 2 can still be encased in corrosion resistant material, which usually has a high coefficient of friction. This does not mean that more power is required to operate the valve because the only contact between the valve housing and the valve obturator is via the low coefficient of friction guide shoes 7 and 8 .
- the valve shown in FIG. 5 operates in a generally similar manner to that shown in FIG. 1 , having a valve housing 1 and an obturator 2 .
- the obturator 2 moves up or down to open or close the valve as desired.
- the obturator 2 is operated by a valve stem 20 which passes out of the housing 1 through an aperture 21 .
- a main seal 22 is provided to reduce the possibility of fluid leaking out of the valve housing around the valve stem 20 .
- annular auxiliary sealing member 23 which is shown in more detail in FIG. 7 .
- annular metal casting 24 surrounded by elastomeric material 25 .
- the elastomeric material 25 has a protruding annular rib 26 .
- the obturator is raised into the fully open position. In this position, the protruding annular rib 26 is compressed upon the underside 27 of the upper part of the valve housing 1 . This compression causes the elastomeric material 25 to be compressed radially inwardly to seal against the valve stem 20 .
- the auxiliary seal could be provided on the underside 27 of the valve housing 1 , or alternatively there could be two auxiliary seals, one on the obturator and one on the housing, which are compressed against one another and against the stem 20 when the valve member moves into the open position.
- the valve shown in FIGS. 1 to 4 may be provided with an auxiliary seal as shown in FIGS. 5 to 7 .
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to valves and particularly, though not exclusively, to gate valves. There is provided a valve comprising a housing (1) and a valve member (2) moveable within the housing (1) to open and close the valve. In a first aspect the valve is provided with means to reduce friction between the housing (1) and valve member (2). In a second aspect the valve is provided with an operating member (20) which is associated with the valve member (2) and passes through an aperture (21) in the housing (1) which is sealed when the valve is in the open position. Such a valve addresses difficulties relating to the operation of prior art valves, particularly gate valves, and specifically the difficulties created by frictional drag upon movement of the valve member, and difficulties in maintaining the valve.
Description
- The invention relates to valves and particularly, though not exclusively, to gate valves.
- A typical gate valve comprises a valve housing and an obturator movable in the housing between open and closed positions.
- When the valve is closed or partly closed, the pressure is greater on one side of the obturator than on the other. This unbalanced pressure creates a force pushing the obturator against supporting surfaces in the housing.
- When the valve is operated, this force creates a friction drag which resists movement of the valve member. The force required to operate the valve is proportional to the friction drag.
- It is beneficial to reduce the operating force for both hand operated and power operated valves. The equipment for the power operation of valves is generally sold in a range of fixed sizes. If the operating force can be reduced sufficiently, it becomes possible to use a lower powered, lower cost operating device.
- It is an object of a first aspect of the invention to provide an effective low cost method of substantially reducing the force required to operate valves,
- According to a first aspect of the invention, there is provided a valve comprising a valve housing, a valve member slidable in the valve housing between open and closed positions, and means to reduce friction between the valve member and the valve housing.
- Preferably, low friction slide surfaces are provided on the obturator of a gate valve.
- Preferably, the obturator is encapsulated in or made from elastomeric material to provide resistance to corrosion, the low friction sliding surfaces being provided externally of the elastomeric material.
- It is generally desirable to have elastomeric material to provide corrosion protection but elastomeric material generally has a high coefficient of friction resulting in high friction drag and high operating forces.
- By providing low friction sliding surfaces externally of the elastomeric material, the corrosion resistance of the obturator is retained, while reducing the force required to operate the valve.
- The low friction sliding surfaces may be provided by at least one guide shoe made of low friction material, and attachable to the obturator.
- Preferably there are two guide shoes, provided at opposite edges of the obturator.
- Each shoe is preferably attachable to the obturator by inserting the shoe into a slot in the obturator.
- Preferably, each slot is closed at its upper and lower ends, trapping the guide shoe within the slot such that vertical movement of the guide shoe with respect to the obturator is substantially prevented.
- Each guide shoe may be a press fit in the associated slot.
- Each guide shoe may be provided with ridges which dig into the elastomeric material of the obturator to help retain the guide shoe in the associated slot.
- The housing may be provided with parallel guide ribs extending down each side of the housing, these ribs cooperating with parallel guide channels in the guide shoes, so that the obturator is guided by cooperation of the ribs and channels, as the obturator moves between the open and closed positions.
- The ribs on the valve housing may be of metal or of metal provided with a corrosion protected coating. The cross section of the guide ribs is preferably rectangular, although other shapes may be used.
- The ridges on the guide shoes may be of saw tooth cross-section to make it relatively easy to insert each guide shoe into the associated slot, but relatively hard for the shoe subsequently to move out of the slot again.
- The inner surfaces of each guide shoe fit around the associated guide rib of the housing, with a sufficient clearance to allow sliding motion to take place.
- The back of each guide shoe may be shaped to fit into a recess within the associated guide slot of the obturator. For example each guide shoe may be provided with a central rib extending along its length from the back of the shoe.
- Many other shapes are however possible. This prevents each guide shoe from sliding out of the associated guide slot parallel to the direction of valve operation.
- Each recess may be coated with elastomeric material although this is not essential.
- Embodiments of the invention have the following advantages.
- A device is provided for reducing the operating force in a gate valve.
- The device is made from low friction material.
- The device may be made from plastics material.
- Acetal plastics may be used.
- The device may be used with an obturator encapsulated in or made from elastomeric material.
- The device may consist of at least one channel cooperating with at least one guide rib on the housing or any part of the valve.
- The device may be retained in the obturator by means of an interference fit with elastomeric material.
- The device may have ridges on its surface in contact with the elastomeric material.
- The ridges may be shaped so that the device may be inserted more easily than it can be withdrawn.
- The device may be arranged to cooperate with a recess in the obturator so that it cannot be extracted from the obturator in the direction of obturator motion.
- According to a second aspect of the invention, there is provided a valve comprising a valve housing, a valve member slidable in the valve housing between open and closed positions, a valve operating member associated with the valve member and passing out of the valve housing through an aperture, the valve having means to seal the aperture when the valve member is in the open position.
- The sealing means may comprise an auxiliary seal on the valve member which comes into sealing contact with both the valve housing and the valve operating member when the valve member is in the open position.
- Alternatively, there may be an auxiliary seal on the valve housing which is contacted by the valve member when the valve member is in the open position.
- Another possibility is that there may be a first auxiliary seal on the valve member and a second auxiliary seal on the valve housing, the two auxiliary seals coming into sealing contact with one another and with the valve operating member when the valve member is in the open position.
- Preferably there is a main seal to provide sealing contact between the valve operating member and the aperture.
- When it is desired to replace or repair the main seal, the valve member may be moved into the open position, in which the auxiliary seal seals the aperture while the main seal is being replaced or repaired.
- The invention includes a valve having the features of both the first and second aspects of the invention.
- By way of example, specific embodiments of the invention will now be described, with reference to the accompanying drawings in which:
-
FIG. 1 is a cross sectional view of an embodiment of valve according to the invention, taken on the centre line of the valve; -
FIG. 2 is a cross-sectional view, to a larger scale, through a guide shoe of the valve shown inFIG. 1 ; -
FIG. 3 is a part cross-sectional view through an obturator of the valve, taken in the plane of the obturator; -
FIG. 4 is a side view of the obturator shown inFIG. 3 ; -
FIG. 5 is a cross-sectional view through a second embodiment of valve according to the invention, looking in the direction of flow; -
FIG. 6 is a view of the obturator of the valve shown inFIG. 5 ; and -
FIG. 7 is a detailed view of part of the obturator shown inFIG. 6 . - The valves shown in FIGS. 1 to 4 has a
valve housing 1 and a gate orobturator 2 moveable down into thehousing 1 to close the valve, and movable back up again to open the valve. - The
obturator 2 comprises ametal casting 3 encapsulated in an elastomeric substance 4. - At each vertical edge of the obturator there Is a
slot 15 having arecessed portion 16. Therecessed portion 16 is closed at its upper 17 and lower 18 ends. - Plugged into each
slot 15 is a guide shoe having the cross section shown in -
FIG. 2 . Acentral rib 12 at the rear of each guide shoe engages in the associatedrecess 16 andlongitudinal ridges slot 15. This digging in tends to retain each guide shoe in its associated slot in the horizontal direction and the guide shoe cannot move out of the slot in the vertical direction because of the engagement of the upper and lower ends of therib 12 with the upper 17 and lower 18 ends of therecessed portion 16 of the associatedslot 15. - The
housing 1 is provided with oppositely facingguide ribs FIG. 1 , these cooperate with the channels in theguide shoes side arms inner face 11 of the associated guide shoe channel. - Because of the inter-position of the guide shoes between the
valve housing 1 and theobturator 2, theobturator 2 can still be encased in corrosion resistant material, which usually has a high coefficient of friction. This does not mean that more power is required to operate the valve because the only contact between the valve housing and the valve obturator is via the low coefficient offriction guide shoes - The valve shown in
FIG. 5 operates in a generally similar manner to that shown inFIG. 1 , having avalve housing 1 and anobturator 2. Theobturator 2 moves up or down to open or close the valve as desired. - The
obturator 2 is operated by avalve stem 20 which passes out of thehousing 1 through anaperture 21. Amain seal 22 is provided to reduce the possibility of fluid leaking out of the valve housing around thevalve stem 20. - In many circumstances it may be necessary to replace or repair the
main seal 22, without taking the valve out of service. - To facilitate this, the upper part of the
obturator 2 is provided with an annularauxiliary sealing member 23 which is shown in more detail inFIG. 7 . There is an annular metal casting 24 surrounded byelastomeric material 25. Theelastomeric material 25 has a protrudingannular rib 26. - If it is decided to provide an auxiliary seal around the
valve stem 20, while theseal 22 is replaced or repaired, the obturator is raised into the fully open position. In this position, the protrudingannular rib 26 is compressed upon theunderside 27 of the upper part of thevalve housing 1. This compression causes theelastomeric material 25 to be compressed radially inwardly to seal against thevalve stem 20. - Instead of providing an auxiliary seal on the obturator, the auxiliary seal could be provided on the
underside 27 of thevalve housing 1, or alternatively there could be two auxiliary seals, one on the obturator and one on the housing, which are compressed against one another and against thestem 20 when the valve member moves into the open position. - The valve shown in FIGS. 1 to 4 may be provided with an auxiliary seal as shown in FIGS. 5 to 7.
- The readers attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
- All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
- Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
- The invention is not restricted to the details of the foregoing embodiment(s). The invention extend to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (16)
1-22. (canceled)
23. A valve comprising a valve housing, a valve member slidable in the valve housing between open and closed positions, and means to reduce friction between the valve member and the valve housing.
24. A valve according to claim 23 wherein the valve comprises a gate valve and the slidable member comprises an obturator with low friction slide surfaces.
25. A valve according to claim 24 wherein the obturator is encapsulated in or made from elastomeric material to provide resistance to corrosion, the low friction sliding surfaces being provided externally of the elastomeric material.
26. A valve according to claim 24 wherein the low friction sliding surfaces are provided by at least one guide shoe made of low friction material, and attachable to the obturator.
27. A valve according to claim 26 wherein there are two guide shoes, provided at opposite edges of the obturator.
28. A valve according to claim 26 wherein the or each guide shoe is attachable to the obturator by inserting the shoes into a slot in the obturator.
29. A valve according to claim 28 wherein the or each guide shoe is arranged to cooperate with the slot in the obturator so that it cannot be extracted from the obturator in the direction of obturator motion.
30. A valve according to claim 28 wherein the or each guide shoe is provided with ridges arranged to contact the elastomeric material of the obturator to help retain the guide shoe in the associated slot.
31. A valve according to claim 30 wherein the ridges on the or each guide shoe are shaped to make it relatively easy to insert the guide shoe into the associated slot, but relatively hard for the shoe subsequently to move out of the slot again.
32. A valve according to claim 27 wherein the housing is provided with parallel guide ribs extending down each side of the housing, these ribs cooperating with parallel guide channels in the guide shoes, so that the obturator is guided by cooperation of the ribs and channels, as the obturator moves between the open and closed positions.
33. A valve according to claim 32 wherein the ribs on the valve housing comprise metal or metal provided with a corrosion protected coating.
34. A valve according to claim 32 wherein the inner surfaces of each guide shoe fit around the associated guide rib of the housing, with a sufficient clearance to allow sliding motion to take place.
35. A valve according to claim 28 wherein the back of the or each guide shoe may be shaped to fit into a recess within the associated guide slot of the obturator.
36. A valve according to claim 23 wherein the valve comprises a valve operating member associated with the valve member and passing out of the valve housing through an aperture, the valve having means to seal the aperture when the valve member is in the open position.
37. A valve comprising:
a valve housing having an interior surface on an underside of the house;
a valve member slidable in the valve housing between open and closed positions:
a valve operating member associated with the valve member and passing out of the valve housing through an aperture;
seal means for sealing the aperture when the valve member is in the open position, and
low friction sliding surfaces provided by at least one guide shoe made of low friction material and attachable to the slidable valve member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/710,946 US20070164248A1 (en) | 2000-07-26 | 2007-02-27 | Valves |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0018222.0A GB0018222D0 (en) | 2000-07-26 | 2000-07-26 | Valves |
GB0018222.0 | 2000-07-26 | ||
PCT/GB2001/003266 WO2002008643A2 (en) | 2000-07-26 | 2001-07-20 | Valve |
US10/333,609 US7201361B2 (en) | 2000-07-26 | 2001-07-20 | Gate valve having reduced friction |
US11/710,946 US20070164248A1 (en) | 2000-07-26 | 2007-02-27 | Valves |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/333,609 Division US7201361B2 (en) | 2000-07-26 | 2001-07-20 | Gate valve having reduced friction |
PCT/GB2001/003266 Division WO2002008643A2 (en) | 2000-07-26 | 2001-07-20 | Valve |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070164248A1 true US20070164248A1 (en) | 2007-07-19 |
Family
ID=9896300
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/333,609 Expired - Fee Related US7201361B2 (en) | 2000-07-26 | 2001-07-20 | Gate valve having reduced friction |
US11/710,946 Abandoned US20070164248A1 (en) | 2000-07-26 | 2007-02-27 | Valves |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/333,609 Expired - Fee Related US7201361B2 (en) | 2000-07-26 | 2001-07-20 | Gate valve having reduced friction |
Country Status (8)
Country | Link |
---|---|
US (2) | US7201361B2 (en) |
EP (1) | EP1307673A2 (en) |
CN (1) | CN1304774C (en) |
AU (1) | AU2001272651A1 (en) |
GB (1) | GB0018222D0 (en) |
PL (1) | PL201617B1 (en) |
RU (1) | RU2304246C2 (en) |
WO (1) | WO2002008643A2 (en) |
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EP2743550A3 (en) * | 2009-12-24 | 2014-07-16 | Tyco Water Valve (Shanghai) Co. Ltd. | Non-rising stem type gate valve |
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UA78335C2 (en) * | 2002-06-27 | 2007-03-15 | Е. Хоул Арматуренверке Гмбх | Shutoff fitting |
NO322877B1 (en) * | 2003-06-06 | 2006-12-18 | Danfoss Esco As | A gate valve |
US20090057598A1 (en) * | 2007-08-31 | 2009-03-05 | Siam Cast Iron Works Co., Ltd. | Resilient Wedge Gate Valve |
CN102252108A (en) * | 2011-07-15 | 2011-11-23 | 浙江盾安阀门有限公司 | Novel hard seal gate valve |
WO2013010546A1 (en) * | 2011-07-15 | 2013-01-24 | Avk Holding A/S | Sliding valve member comprising guide means |
CN102829200A (en) * | 2012-09-13 | 2012-12-19 | 许宏伟 | Rubber sluice valve |
US9845890B2 (en) | 2016-01-11 | 2017-12-19 | Valterra Products, Llc | Gate valve for controlling the passage of liquid |
CN106321872A (en) * | 2016-10-17 | 2017-01-11 | 沈阳大学 | Three-piece type gate valve with guide function |
CN107606200A (en) * | 2017-08-30 | 2018-01-19 | 苏州昌田机械设备制造有限公司 | A kind of manual self-cleaning type valve flashboard of oil exploitation |
CN107387788A (en) * | 2017-08-30 | 2017-11-24 | 苏州昌田机械设备制造有限公司 | A kind of high leakproofness pneumatic type oil valve flashboard |
RU196267U1 (en) * | 2018-09-06 | 2020-02-21 | Общество с ограниченной ответственностью Центральный научно-исследовательский проектный институт "Современные Технологии Арматуростроительного Комплекса" | LATCH |
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US2924233A (en) * | 1960-02-09 | michaels | ||
DE1032992B (en) | 1957-03-05 | 1958-06-26 | Stahl Armaturen G M B H | Shut-off valve with back seal |
DE2609635C3 (en) | 1976-03-09 | 1982-01-28 | Fa. J. Gg. Büttner, 8500 Nürnberg | Back sealing of a valve for hot media |
US4257447A (en) * | 1979-01-29 | 1981-03-24 | The Clarkson Company | Gate valve |
GB2070203B (en) | 1980-02-26 | 1984-05-02 | Fmc Corp | Gate valve |
US4354425A (en) * | 1980-05-09 | 1982-10-19 | U.S. Industries, Inc. | Fire-safe valve actuator |
US4373700A (en) * | 1981-02-25 | 1983-02-15 | Fmc Corporation | Metal seal for a gate valve stem |
DE3428485A1 (en) * | 1984-08-02 | 1986-02-20 | Bopp & Reuther Gmbh, 6800 Mannheim | LOCKING WEDGE FOR LOCKING VALVES |
DE3828561C2 (en) | 1988-08-23 | 1997-04-30 | Immanuel Jeschke | Gate valve |
US4991619A (en) * | 1989-01-04 | 1991-02-12 | Saes Getters Spa | High purity gas delivery control assembly |
FR2651853B1 (en) * | 1989-09-12 | 1991-12-13 | Pont A Mousson | DEVICE FOR FIXING FRICTION PADS ON A VALVE LID. |
US5221063A (en) * | 1992-04-30 | 1993-06-22 | Fmc Corporation | Selective double backseat for valve stems |
-
2000
- 2000-07-26 GB GBGB0018222.0A patent/GB0018222D0/en not_active Ceased
-
2001
- 2001-07-20 AU AU2001272651A patent/AU2001272651A1/en not_active Abandoned
- 2001-07-20 CN CNB018134149A patent/CN1304774C/en not_active Expired - Lifetime
- 2001-07-20 EP EP01951802A patent/EP1307673A2/en not_active Withdrawn
- 2001-07-20 WO PCT/GB2001/003266 patent/WO2002008643A2/en not_active Application Discontinuation
- 2001-07-20 PL PL364997A patent/PL201617B1/en unknown
- 2001-07-20 RU RU2003104811/06A patent/RU2304246C2/en not_active Application Discontinuation
- 2001-07-20 US US10/333,609 patent/US7201361B2/en not_active Expired - Fee Related
-
2007
- 2007-02-27 US US11/710,946 patent/US20070164248A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3032310A (en) * | 1959-02-24 | 1962-05-01 | Crane Co | Fabricated gate valve and method of making same |
US4532957A (en) * | 1983-06-24 | 1985-08-06 | United States Pipe And Foundry Company | Guides for gate valves |
US4629160A (en) * | 1983-12-14 | 1986-12-16 | Bopp & Reuther Gmbh | Shutoff wedge for shutoff valve |
US5836569A (en) * | 1995-04-11 | 1998-11-17 | Flowserve Management Company | Guided gate valve |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2743550A3 (en) * | 2009-12-24 | 2014-07-16 | Tyco Water Valve (Shanghai) Co. Ltd. | Non-rising stem type gate valve |
Also Published As
Publication number | Publication date |
---|---|
PL364997A1 (en) | 2004-12-27 |
CN1444706A (en) | 2003-09-24 |
GB0018222D0 (en) | 2000-09-13 |
RU2304246C2 (en) | 2007-08-10 |
RU2003104811A (en) | 2004-10-20 |
EP1307673A2 (en) | 2003-05-07 |
AU2001272651A1 (en) | 2002-02-05 |
WO2002008643A3 (en) | 2002-05-30 |
PL201617B1 (en) | 2009-04-30 |
US20030173535A1 (en) | 2003-09-18 |
US7201361B2 (en) | 2007-04-10 |
WO2002008643A2 (en) | 2002-01-31 |
CN1304774C (en) | 2007-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AEON INTERNATIONAL LIMITED, UNITED KINGDOM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AEON PLC;REEL/FRAME:021057/0016 Effective date: 20080411 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |