Patent US3075448A successfully refreshed from Google Patents.
US3075448A
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US
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Blast valve and method of blast protection
Assignee: Ammann & Whitney
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Filing: 1960-06-30
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Granted: 1963-01-29
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Expires: 1980-06-30
Abstract
No abstract record available.
Inventors
- 👤 Cohen Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:39
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/006; Y; Y10; Y10S; Y10S55/00; Y10S55/09; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7728; Y10T137/7837; Y10T137/785; Y10T137/7869
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
THE METHOD OF PROTECTING, FROM ATOMIC OR OTHER EXPLOSION, A FACILITY REQUIRING AIR FOR ITS OPERATION, SAID TACILITY BEING LOCATED IN CHAMBER CONNECTED TO ATMOSPHERE BY A VENTILATING CONDUIT, SAID CONDUIT HAVING A BLAST VALVE, SAID BLAST VALVE HAVING A PORT IN SAID CONDUIT, A MOVABLE VALVE CLOSURE COMPRISING AN ACTUATING PORTION AND A CLOSURE PORTION, YIELDABLE MEANS TO HOLD SAID CLOSURE IN OPEN POSITION, ONE SIDE OF SAID ACTUATING PORTION BEING EXPOSED TO THE BLAST WAVE ORIGINATING AT SAID EXPLOSION; SAID METHOD COMPRISING TRAVELLING SAID WAVE THROUGH AIR IN SAID CONDUIT TO EXERT A CLOSING FORCE AGAINST SAID ACTUATING PORTION, AND IMPEDING TRAVEL OF SAID WAVE TO THE OTHER SIDE OF SAID ACTUATING PORTION AT LEAST UNTIL SAID CLOSURE HAS MOVED A SUBSTANTIAL DISTANCE TOWARD SAID PORT.
References Cited (Backward Citations)
US984994A
Cited
FR678563A
Cited
AT147053B
Cited
US2024042A
Cited
US2245271A
Cited
US2490175A
Cited
US2704983A
Cited
US2801067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |