Patent US3827700A successfully refreshed from Google Patents.
US3827700A
Expired / Lapsed
US
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Sealing device
Assignee: Individual
•
Filing: 1972-09-29
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Granted: 1974-08-06
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Expires: 1992-09-29
Abstract
Abstract A sealing arrangement for a high pressure gas cylinder closed at one end by a slideable piston. An annular space between the piston and cylinder carries opposing sealing members with facing sealing lips. Oil in the cavity between the sealing members is kept under pressure by the expansive force of the gas in the cylinder. The oil pressure is always maintained higher than the gas pressure by either a spring urging the sealing members together, or a stepped construction whereby the reactive area of the cavity is less than the active area between the piston and cylinder.
Inventors
- 👤 S Kaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:35
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/28; F16J15/00; F16J15/56; Y; Y10; Y10S; Y10S277/00; Y10S277/904
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
Sealing device for preventing leakage of high-pressure gas between two relatively movable elements comprising at least two spaced and facing sealing members defining together with the movable elements a space for a non-gaseous medium, characterized in that a first sealing member contiguous to the high-pressure gas is displaceable under the action of the high-pressure gas towards a second sealing member contiguous to the low-pressure side and in that means coacting with the displaceable sealing member are adapted to impart to the medium confined in said space a resulting pressure higher than the pressure of the highpressure gas.
Claim 2
Dependent Claim
97 words
Sealing device for preventing leakage of high-pressure gas between two relatively movable elements comprising at least two spaced and facing sealing members defining together with the movable elements a space for a non-gaseous medium, characterized in that a first sealing member contiguous to the high-pressure gas is displaceable under the action of the high-pressure gas towards a second sealing member contiguous to the low-pressure side and in that means coacting with the displaceable sealing member are adapted to impart to the medium confined in said space a resulting pressure higher than the pressure of the highpressure gas.
Claim 3
Dependent Claim
35 words
Sealing device according to claim 1, characterized in that the means coacting with the displaceable sealing member are constituted by spring means acting on the side of the sealing member facing away from the space.
Claim 4
Dependent Claim
70 words
Sealing device according to claim 1, characterized in that said means coacting with the displaceable sealing member are constituted by a sleeve member surrounding both sealing members and adapted to be moved together with the displaceable sealing member and during the displacement of the latter sealingly slide on the second sealing member and to form an extension of that surface of the displaceable sealing member, which faces the high-pressure gas.
Claim 5
Dependent Claim
18 words
Sealing device according to claim 3, characterized in that the sleeve member includes a rear annular guide member.
References Cited (Backward Citations)
US2286425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |