Patent US3747627A successfully refreshed from Google Patents.
US3747627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator and compensator
Assignee: United States Department of the Navy
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Filing: 1972-06-08
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Granted: 1973-07-24
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Expires: 1992-06-08
Abstract
Abstract A pressure compensator includes two reciprocally displacable sealing assemblies for allowing the exchange of fluid to permit overpressure compensation as well as underpressure compensation. In either case, rigid annular mating sealing surfaces cooperate to bear the brunt of the sealing load while either one of two resilient annular four-lobed seals bear against a continuation of the opposed rigid sealing surface to effect the primary sealing. Having the serially arranged heavy-duty rigid sealing surfaces and the resilient four-lobed seal renders the pressure compensator well suited for pressure regulation of gases and permits its interconnection to a source of high-pressure gas without the danger of failure.
Inventors
- 👤 S Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; G; G05; G05D; G05D16/00; G05D16/028; G05D16/04; G05D16/10; G05D16/101; G05D16/109; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
345 words
An apparatus for compensating for underpressure and overpressure in a chamber with respect to a source of reference pressure comprising: a source of higher pressure fluid; and a casing having a longitudinal bore and shaped with a casing rigid sealing surface and ports communicating with said source of higher pressure fluid, said source of reference pressure, a pressure vent, and said chamber including, a first piston member carried in said casing being responsive to said underpressure to be moved in one direction and to said overpressure to be moved in the opposite direction, a primary piston member disposed in said longitudinal bore and connected to said first piston member, said primary piston is provided with a rigid sealing surface and a juxtaposed groove containing a first resilient sealing element, a sleeve member disposed in said longitudinal bore provided with a first rigid sealing surface forcefully abutting the piston rigid sealing surface and said first resilient sealing element for closing a passageway between said chamber and said pressure vent and said sleeve member further includes a second rigid sealing surface and a juxtaposed groove containing a second resilient sealing element forcefully abutting said casing rigid sealing surface, a follower member secured to said primary piston member and disposed inside said sleeve member, and means carried between said follower member and said sleeve member for holding the piston rigid sealing surface and first resilient sealing element and first rigid sealing surface together when said first piston member is displaced in said one direction while said second rigid sealing surface and said second resilient sealing element is removed from said casing rigid sealing surface creating a passageway between said chamber and said source of higher pressure and for further holding said second rigid sealing surface and said second resilient sealing element and said casing rigid sealing surface together when said first piston is displaced in said opposite direction while said piston rigid sealing surface and first resilient sealing element is removed from said first rigid sealing surface for opening a passageway between said chamber and said pressure vent.
Claim 2
Independent Claim
345 words
An apparatus for compensating for underpressure and overpressure in a chamber with respect to a source of reference pressure comprising: a source of higher pressure fluid; and a casing having a longitudinal bore and shaped with a casing rigid sealing surface and ports communicating with said source of higher pressure fluid, said source of reference pressure, a pressure vent, and said chamber including, a first piston member carried in said casing being responsive to said underpressure to be moved in one direction and to said overpressure to be moved in the opposite direction, a primary piston member disposed in said longitudinal bore and connected to said first piston member, said primary piston is provided with a rigid sealing surface and a juxtaposed groove containing a first resilient sealing element, a sleeve member disposed in said longitudinal bore provided with a first rigid sealing surface forcefully abutting the piston rigid sealing surface and said first resilient sealing element for closing a passageway between said chamber and said pressure vent and said sleeve member further includes a second rigid sealing surface and a juxtaposed groove containing a second resilient sealing element forcefully abutting said casing rigid sealing surface, a follower member secured to said primary piston member and disposed inside said sleeve member, and means carried between said follower member and said sleeve member for holding the piston rigid sealing surface and first resilient sealing element and first rigid sealing surface together when said first piston member is displaced in said one direction while said second rigid sealing surface and said second resilient sealing element is removed from said casing rigid sealing surface creating a passageway between said chamber and said source of higher pressure and for further holding said second rigid sealing surface and said second resilient sealing element and said casing rigid sealing surface together when said first piston is displaced in said opposite direction while said piston rigid sealing surface and first resilient sealing element is removed from said first rigid sealing surface for opening a passageway between said chamber and said pressure vent.
Claim 3
Dependent Claim
38 words
An apparatus according to claim 1 in which said piston rigid sealing surface, said first and second rigid sealing surface and said casing rigid sealing surface are annular machined surfaces for bearing the brunt of high pressure differentials.
Claim 4
Dependent Claim
32 words
An apparatus according to claim 2 further including: means mounted in said casing abutting said first piston member for ensuring a pressure differential between said chamber and said source of reference pressure.
Claim 5
Dependent Claim
25 words
An apparatus according to claim 3 in which said first resilient sealing element and said second resilient sealing element are each a four-lobed sealing ring.
Claim 6
Dependent Claim
30 words
An apparatus according to claim 4 further including: a retaining ring holding each four-lobed sealing ring in its respective groove with one lobe extending beyond its juxtaposed rigid sealing surface.
Claim 7
Dependent Claim
27 words
An apparatus according to claim 5 in which said first piston member is a rigid disk sealed at its periphery on an internal surface of said casing.
Claim 8
Dependent Claim
28 words
An apparatus according to claim 6 further including: at least one O-ring carried on the outer surface of said sleeve member and said follower member to prevent blow-by.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |