US3173356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety air valve for air raid shelters
Assignee: EWERS AND MIESNER HARTGUSSWERK und MASCHINENFABRIK GmbH
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Filing: 1963-04-02
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Granted: 1965-03-16
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Schierse Paul
- 👤 Fianke Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:58
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/006; A; A62; A62B; A62B13/00; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2021; F16K1/2028; Y; Y10; Y10S; Y10S454/00; Y10S454/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
AN AIR DUCT SAFTEY VALVE FOR A SHELTER SUBJECT TO AIR PRESSURE VARIATIONS COMPRISING AN ELBOW-SHAPED HOUSING HAVING AN ATMOSPHERIC AIR INLET OPENING AND AN AIR OUTLET OPENING FOR FACING THE INTERIOR OF THE SHELTER, A VALVE SEAT IN EACH OPENING, RESPECTIVELY, WITH THE VALVE SEAT IN ONE OPENING POSITIONED SUBSTANTIALLY AT A RIGHT ANGLE TO THE VALVE SEAT IN THE OTHER OPENING, RESPECTIVELY, A BALANCE BEAM HAVING TWO BEAM ARMS INCLINED AT AN ANGLE TO EACH OTHER, MEANS PIVOTALLY MOUNTING SAID BEAM IN SAID HOUSING, AN AIR INLET VALVE HEAD FOR THE AIR INLET VALVE SEAT, AN AIR OUTLET VALVE HEAD FOR THE AIR OUTLET VALVE SEAT, MEANS PIVOTALLY MOUNTING EACH VALVE HEAD, RESPECTIVELY, AT THE ENDS OF SAID BEAM ARMS, SAID BALANCE BEAM HAVING ITS CENTER OF GRAVITY ADJACENT THE PIVOT POINT OF SAID BEAM ON THE SIDE OF SAID OUTLET VALVE HEAD FR HOLDING EACH VALVE HEAD OFF OF ITS RESPECTIVE SEAT IN THE NORMAL OPEN POSITION
Claim 2
Dependent Claim
160 words
AN AIR DUCT SAFTEY VALVE FOR A SHELTER SUBJECT TO AIR PRESSURE VARIATIONS COMPRISING AN ELBOW-SHAPED HOUSING HAVING AN ATMOSPHERIC AIR INLET OPENING AND AN AIR OUTLET OPENING FOR FACING THE INTERIOR OF THE SHELTER, A VALVE SEAT IN EACH OPENING, RESPECTIVELY, WITH THE VALVE SEAT IN ONE OPENING POSITIONED SUBSTANTIALLY AT A RIGHT ANGLE TO THE VALVE SEAT IN THE OTHER OPENING, RESPECTIVELY, A BALANCE BEAM HAVING TWO BEAM ARMS INCLINED AT AN ANGLE TO EACH OTHER, MEANS PIVOTALLY MOUNTING SAID BEAM IN SAID HOUSING, AN AIR INLET VALVE HEAD FOR THE AIR INLET VALVE SEAT, AN AIR OUTLET VALVE HEAD FOR THE AIR OUTLET VALVE SEAT, MEANS PIVOTALLY MOUNTING EACH VALVE HEAD, RESPECTIVELY, AT THE ENDS OF SAID BEAM ARMS, SAID BALANCE BEAM HAVING ITS CENTER OF GRAVITY ADJACENT THE PIVOT POINT OF SAID BEAM ON THE SIDE OF SAID OUTLET VALVE HEAD FR HOLDING EACH VALVE HEAD OFF OF ITS RESPECTIVE SEAT IN THE NORMAL OPEN POSITION
References Cited (Backward Citations)
US2017033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |