US3844307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve for the transfer of high purity gas
Assignee: Cegelec SA
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Filing: 1972-05-25
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Granted: 1974-10-29
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Expires: 1992-05-25
Abstract
Abstract A gate valve for use in the transfer of high purity gases includes a valve closure member disposed in a passage for regulating the gas flow therethrough, a piston gliding in a guide member and connected to the valve closure member and a fluidtight sealing bellows connected between the piston and the guide member. The guide member is clamped against a sealing ring in the body of the valve assuring the fluid tightness between the inner volume of the body of the gate valve and the control head of the piston. The surfaces of the parts of the valve which are in gliding contact or threaded engagement with other parts are all disposed on the side of the fluid-tight sealing bellows or the sealing ring opposite the inner volume of the body of the gate valve.
Inventors
- 👤 J Soury
- 👤 A Lambert
- 👤 R Barandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5283
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
280 words
A gate valve for the transfer of a high purity gas, comprising a valve body having a gas passage communicating with an inner chamber, a closure member disposed in said inner chamber for selective engagement in said gas passage to open and close said passage, a piston having an elongated body and an outwardly extending annular flange at one end thereof which is secured to said closure member, a guide member mounted in said valve body having said piston glidingly disposed therein and including a projecting portion guiding said one end of said piston, a sealing ring disposed between said guide member and said valve body, clamping means for clamping said guide member against said sealing ring, means for moving said piston, and a fluid-tight sealing bellows surrounding said projecting portion of said guide member and being connected between said one end of said annular flange of said piston and said guide member so that said closure member in said inner chamber is effectively isolated by said sealing ring and said bellows from the contacting surfaces of said piston and said guide member and from said clamping means, wherein said means for moving said piston includes a hollow adjusting member, a diaphragm disposed in said adjusting member to define a chamber on at least one side thereof, and a control rod secured to said diaphragm and coupled to the end of said piston opposite said closure member, said adjusting member being secured to said valve body and having a pressure inlet passage for introducing a gas under pressure into said chamber thereof to effect movement of said control rod and said piston, thereby regulating the position of said closure member.
Claim 2
Dependent Claim
280 words
A gate valve for the transfer of a high purity gas, comprising a valve body having a gas passage communicating with an inner chamber, a closure member disposed in said inner chamber for selective engagement in said gas passage to open and close said passage, a piston having an elongated body and an outwardly extending annular flange at one end thereof which is secured to said closure member, a guide member mounted in said valve body having said piston glidingly disposed therein and including a projecting portion guiding said one end of said piston, a sealing ring disposed between said guide member and said valve body, clamping means for clamping said guide member against said sealing ring, means for moving said piston, and a fluid-tight sealing bellows surrounding said projecting portion of said guide member and being connected between said one end of said annular flange of said piston and said guide member so that said closure member in said inner chamber is effectively isolated by said sealing ring and said bellows from the contacting surfaces of said piston and said guide member and from said clamping means, wherein said means for moving said piston includes a hollow adjusting member, a diaphragm disposed in said adjusting member to define a chamber on at least one side thereof, and a control rod secured to said diaphragm and coupled to the end of said piston opposite said closure member, said adjusting member being secured to said valve body and having a pressure inlet passage for introducing a gas under pressure into said chamber thereof to effect movement of said control rod and said piston, thereby regulating the position of said closure member.
Claim 3
Dependent Claim
195 words
A gate valve for the transfer of a high purity gas, comprising a valve body having a gas passage communicating with an inner chamber, a closure member disposed in said inner chamber for selective engagement in said gas passage to open and close said passage, a piston having one end thereof secured to said closure member, a guide member mounted in said valve body having said piston glidingly disposed therein, a sealing ring disposed between said guide member and said valve body, clamping means for clamping said guide member against said sealing ring, means for moving said piston, and a fluid-tight sealing bellows connected between said one end of said piston and said guide member so that said closure member in said inner chamber is effectively isolated by said sealing ring and said bellows from the contacting surfaces of said piston and said guide member and from said clamping means, said guide member being provided with an annular flange contacting said sealing ring, and said clamping means being provided in the form of a threaded ring engaging in a tapped opening in said valve body and bearing against the annular flange of said guide member.
Claim 4
Dependent Claim
195 words
A gate valve for the transfer of a high purity gas, comprising a valve body having a gas passage communicating with an inner chamber, a closure member disposed in said inner chamber for selective engagement in said gas passage to open and close said passage, a piston having one end thereof secured to said closure member, a guide member mounted in said valve body having said piston glidingly disposed therein, a sealing ring disposed between said guide member and said valve body, clamping means for clamping said guide member against said sealing ring, means for moving said piston, and a fluid-tight sealing bellows connected between said one end of said piston and said guide member so that said closure member in said inner chamber is effectively isolated by said sealing ring and said bellows from the contacting surfaces of said piston and said guide member and from said clamping means, said guide member being provided with an annular flange contacting said sealing ring, and said clamping means being provided in the form of a threaded ring engaging in a tapped opening in said valve body and bearing against the annular flange of said guide member.
Claim 5
Dependent Claim
70 words
A gate valve according to claim 2 wherein said means for moving said piston includes a cup shape adjusting member threadedly engaging with said valve body in axial alignment with said piston and a control rod mounted in said adjusting member and coupled to the end of said piston opposite said closure member so that adjustment of said adjusting member on said valve body will produce displacement of said piston.
Claim 6
Dependent Claim
42 words
A gate valve according to claim 3 wherein a spring member is interposed between said control rod and the annular flange of said guide member to bias said piston via said control rod and said closure member into an open valve position.
Claim 7
Dependent Claim
99 words
A gate valve according to claim 2 wherein said means for moving said piston includes a hollow adjusting member, a diaphragm disposed in said adjusting member to define a chamber on at least one side thereof, and a control rod secured to said diaphragm and coupled to the end of said piston opposite said closure member, said adjusting member being secured to said valve body and having a pressure inlet passage for introducing a gas under pressure into said chamber thereof to effect movement of said control rod and said piston, thereby regulating the position of said closure member.
Claim 8
Dependent Claim
59 words
A gate valve according to claim 5 wherein said chamber in said adjusting member is disposed on the side of said diaphragm opposite said piston and a spring member is positioned between said diaphragm and the annular flange of said guide member to bias said piston via said control rod and said closure member into an open valve position.
Claim 9
Dependent Claim
55 words
A gate valve according to claim 5 wherein said chamber in said adjusting member is disposed on the side of said diaphragm facing said piston and a spring member is in contact with the opposite side of said diaphragm to bias said piston via said control rod and said closure member into a closed position.
Claim 10
Dependent Claim
17 words
A gate valve according to claim 7 wherein said pressure inlet passage extends through said control rod.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |