Patent US3904175A successfully refreshed from Google Patents.
US3904175A
Expired / Lapsed
US
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Arrangement of resilient diaphragm acting as a valve seat and separating adjacent pressure chambers
Assignee: Wabco Westinghouse SA
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Filing: 1974-06-28
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Granted: 1975-09-09
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Expires: 1994-06-28
Abstract
Abstract A novel arrangement of a resilient diaphragm in a valve device wherein said diaphragm serves to separate two adjacent pressure chambers and also acts as a valve seat, said arrangement being structured to subject the diaphragm to radial stresses as well as axial stresses for keeping the diaphragm wrinkle free in the area acting as a valve seat.
Inventors
- 👤 Roger Deschenes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:13
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/14; F16K7/17; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
194 words
In a valve device comprising a first casing section having a first pressure chamber and secured to a second casing section having a second pressue chamber therein, said second pressure chamber being normally charged at a pressure higher than said first pressure chamber, the combination of: a. a diaphragm member sealingly secured at its outer periphery between said first and second casing sections for separating said first pressure chamber from said second pressure chamber; b. a valve member operably disposed in said second chamber and having a valve seat thereon, said valve member normally being biased toward a seated position in which said valve seat is seated on one side of said diaphragm member adjacent said second chamber; and c. a follower plate biased against the opposite side of said diaphragm member for movement therewith and having a recess formed therein on the side adjacent said opposite side of the diaphragm, the portion of said diaphragm extending over said recess being distortedly forced thereinto by the higher pressure in said second chamber for causing the remainder of the diaphragm to be drawn taut and flat for insuring sealing contact of said valve seat thereon.
Claim 2
Dependent Claim
194 words
In a valve device comprising a first casing section having a first pressure chamber and secured to a second casing section having a second pressue chamber therein, said second pressure chamber being normally charged at a pressure higher than said first pressure chamber, the combination of: a. a diaphragm member sealingly secured at its outer periphery between said first and second casing sections for separating said first pressure chamber from said second pressure chamber; b. a valve member operably disposed in said second chamber and having a valve seat thereon, said valve member normally being biased toward a seated position in which said valve seat is seated on one side of said diaphragm member adjacent said second chamber; and c. a follower plate biased against the opposite side of said diaphragm member for movement therewith and having a recess formed therein on the side adjacent said opposite side of the diaphragm, the portion of said diaphragm extending over said recess being distortedly forced thereinto by the higher pressure in said second chamber for causing the remainder of the diaphragm to be drawn taut and flat for insuring sealing contact of said valve seat thereon.
Claim 3
Dependent Claim
41 words
The combination, as set forth in claim 1, wherein said recess is an annular channel of greater diameter than said valve seat and disposed in surrounding relation to that portion of said diaphragm contacted by the valve seat when seated thereon.
Claim 4
Dependent Claim
45 words
The combination, as set forth in claim 2, wherein said valve member is provided with a coaxial passageway extending therethrough and via which fluid pressure may be relieved from said second chamber when said valve member occupies an unseated position relative to the diaphragm member.
Claim 5
Dependent Claim
58 words
The combination, as set forth in claim 2, wherein said diaphragm member and said follower plate are provided with axially aligned apertures in concentric relation to said annular channel and via which fluid pressure may be relieved from said second chamber to said first chamber when said valve member occupies an unseated position relative to the diaphragm member.
Claim 6
Dependent Claim
33 words
The combination, as set forth in claim 2, wherein said channel is provided with a plurality of angularly spaced openings for communicating the chAnnel with said first chamber and the lesser pressure therein.
Claim 7
Dependent Claim
17 words
The combination, as set forth in claim 5, wherein said annular channel is of rectangular cross section.
Claim 8
Dependent Claim
19 words
The combination, as set forth in claim 5, wherein said annular channel is of an inverted V-shaped cross section.
References Cited (Backward Citations)
US3319926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |