Patent US4255916A successfully refreshed from Google Patents.
US4255916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of charging and hermetically sealing high pressure gas container
Assignee: United States Department of the Navy
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Filing: 1980-02-22
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Granted: 1981-03-17
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Expires: 2000-02-22
Abstract
Abstract A hermetically sealed high pressure gas container comprising a high stren chamber for confining the gas and a check valve fitted on and soldered to a boss formed integral with the chamber. The check valve serves as a temporary seal and permits the chamber to be charged with gas under atmospheric conditions. After charging, the inlet port of the check valve is soldered closed to provide a hermetic seal.
Inventors
- 👤 John E. Blankenship
- 👤 Roy W. Hoback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:28
CPC Classifications
F; F17; F17C; F17C5/00; F17C5/06; F17C13/00; F17C13/06; F17C2201/00; F17C2201/01; F17C2201/0128; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0335
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A method of charging a container with gas under very high pressure and then hermetically sealing the container to provide extended shelf life comprising the steps of: providing a strong pressure chamber having a boss formed thereon: fitting a check valve on said boss; soldering said check valve to said boss to provide a hermetically sealed joint; charging said chamber with high pressure gas through said check valve whereby said check valve temporarily retains said gas within said chamber; and soldering closed the inlet port of said check valve to provide a hermetically sealed container.
Claim 2
Independent Claim
95 words
A method of charging a container with gas under very high pressure and then hermetically sealing the container to provide extended shelf life comprising the steps of: providing a strong pressure chamber having a boss formed thereon: fitting a check valve on said boss; soldering said check valve to said boss to provide a hermetically sealed joint; charging said chamber with high pressure gas through said check valve whereby said check valve temporarily retains said gas within said chamber; and soldering closed the inlet port of said check valve to provide a hermetically sealed container.
Claim 3
Dependent Claim
46 words
The method of claim 1 including the step of providing a region of reduced cross-section on said boss between said chamber and said check valve whereby a lateral blow to said valve body may be used to fracture said boss and permit escape of said gas.
Claim 4
Dependent Claim
26 words
The method of claim 2 wherein the high pressure gas is dry argon, the pressure is approximately 7000 psi, and the solder is a tin alloy.
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |