Patent US3450155A successfully refreshed from Google Patents.
US3450155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frictionless relief valve
Assignee: United States Department of the Navy
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Filing: 1964-02-06
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Granted: 1969-06-17
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Expires: 1984-02-06
Abstract
No abstract record available.
Inventors
- 👤 Warren P Froehner
- 👤 Robert E Swallow
- 👤 Delbert W Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:01
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0406; F16K17/08; F16K17/087; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A RELIEF VALVE ADAPTED FOR USE WITH A PRESSURIZED FLUID SYSTEM FOR CONTROLLING THE PRESSURE OF THE SYSTEM COMPRISING: A CYLINDRICAL BODY CASING HAVING AN INLET PASSAGE WAY FORMED WITH A VALVE SEAT AT ONE END AND EXHAUST PORTS AT THE OTHER END; SAID INLET PASSAGE WAY AND EXHAUST PORTS BEIG AXIALLY ALIGNED WITH THE CENTER AXIS OF THE BODY CASING; A BELLOW ASSEMBLY SUPPORTED WITHIN AN SPACED FROM THE INNER WALLS OF SAID BODY CASING COMPRISING A FLEXIBLE CONVOLUTED ENVELOPE HAVING ENDS; ONE END OF SAID ASSEMBLY TERMINATING ADJACENT SAID EXHAUST PORTS IN A SEALING MEMBER; SAID SEALING MEMBER HAVING AN OPENING IN COMMUNICATION WITH THE INTERIOR OF SAID BELOWS ASSEMBLY AND SAID EXHAUST PORTS; THE OTHER END OF SAID BELLOWS ASSEMBLY TERMINATING IN ANOTHER VALVE SEAT HAVING A PASSAGEWAY THERETHROUGH;
Claim 2
Dependent Claim
132 words
A RELIEF VALVE ADAPTED FOR USE WITH A PRESSURIZED FLUID SYSTEM FOR CONTROLLING THE PRESSURE OF THE SYSTEM COMPRISING: A CYLINDRICAL BODY CASING HAVING AN INLET PASSAGE WAY FORMED WITH A VALVE SEAT AT ONE END AND EXHAUST PORTS AT THE OTHER END; SAID INLET PASSAGE WAY AND EXHAUST PORTS BEIG AXIALLY ALIGNED WITH THE CENTER AXIS OF THE BODY CASING; A BELLOW ASSEMBLY SUPPORTED WITHIN AN SPACED FROM THE INNER WALLS OF SAID BODY CASING COMPRISING A FLEXIBLE CONVOLUTED ENVELOPE HAVING ENDS; ONE END OF SAID ASSEMBLY TERMINATING ADJACENT SAID EXHAUST PORTS IN A SEALING MEMBER; SAID SEALING MEMBER HAVING AN OPENING IN COMMUNICATION WITH THE INTERIOR OF SAID BELOWS ASSEMBLY AND SAID EXHAUST PORTS; THE OTHER END OF SAID BELLOWS ASSEMBLY TERMINATING IN ANOTHER VALVE SEAT HAVING A PASSAGEWAY THERETHROUGH;
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |