Patent US3109451A successfully refreshed from Google Patents.
US3109451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: AIM PUMP CORP
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Filing: 1961-01-23
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Granted: 1963-11-05
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Agis I Mihalakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:16
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/16; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7869; Y10T137/7879; Y10T137/7887
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A CHECK VALVE, COMPRISING: A HOUSING STRUCTURE DEFINING AN ELONGATED, RECTANGULAR, FLAT CAVITY, AND INLET AND OUTLET OPENINGS INTERSECTING OPPOSITE FLAT SIDES OF SAID CAVITY CENTRALLY THEREOF, SAID CAVITY EXTENDING BEYOND SAID OPENINGS ALONG A LONGITUDINAL AXIS; A VALVE SEAT PLATE COVERING THE INLET SIDE OF SAID CAVITY AND THE INTERSECTING INLET OPENING THEREIN; SAID VALVE SEAT PLATE HAVING AT LEAST A PAIR OF ELONGATED INLET SLOTS HAVING A LONGITUDINAL DIMENSION GREATER THAN THAT OF SAID INLET OPENING AND COMMUNICATING AT THEIR CENTRAL PORTIONS WITH SAID INLET OPENING AND FORMING PASSAGES FOR LATERAL FLOW TO THEIR EXTREMITIES; ELONGATED RIBS EXTENDING FROM THE OUTLET OPENING SIDE OF SAID CAVITY IN REGISTRY WITH SAID SLOTS; A RECTANGULAR VALVE ELEMENT IN THE FORM OF AN ARCHED FLEXIBLE STRIP HAVING AT LEAST ONE LONGITUDINAL SLOT THEREIN, SAID SLOT HAVING A LONGITUDINAL DIMENSION GREATER THAN THAT OF EITHER SAID INLET OR OUTLET OPENINGS; AND FORMING ON OPPOSITE SIDES OF SAID SLOTS ELONGATED VALVE FACES, SAID VALVE ELEMENT DISPOSED IN SAID CAVITY BETWEEN SAID RIBS AND INLET SLOTS AND NORMALLY ARCHED AWAY FROM SAID INLET SLOTS, SAID VALVE FACES DIMENSIONED TO COVER AND SEAL SAID INLET SLOTS UPON FLATTENING SAID VALVE ELEMENT AGAINST SAID VALVE SEAT PLATE.
Claim 2
Dependent Claim
201 words
A CHECK VALVE, COMPRISING: A HOUSING STRUCTURE DEFINING AN ELONGATED, RECTANGULAR, FLAT CAVITY, AND INLET AND OUTLET OPENINGS INTERSECTING OPPOSITE FLAT SIDES OF SAID CAVITY CENTRALLY THEREOF, SAID CAVITY EXTENDING BEYOND SAID OPENINGS ALONG A LONGITUDINAL AXIS; A VALVE SEAT PLATE COVERING THE INLET SIDE OF SAID CAVITY AND THE INTERSECTING INLET OPENING THEREIN; SAID VALVE SEAT PLATE HAVING AT LEAST A PAIR OF ELONGATED INLET SLOTS HAVING A LONGITUDINAL DIMENSION GREATER THAN THAT OF SAID INLET OPENING AND COMMUNICATING AT THEIR CENTRAL PORTIONS WITH SAID INLET OPENING AND FORMING PASSAGES FOR LATERAL FLOW TO THEIR EXTREMITIES; ELONGATED RIBS EXTENDING FROM THE OUTLET OPENING SIDE OF SAID CAVITY IN REGISTRY WITH SAID SLOTS; A RECTANGULAR VALVE ELEMENT IN THE FORM OF AN ARCHED FLEXIBLE STRIP HAVING AT LEAST ONE LONGITUDINAL SLOT THEREIN, SAID SLOT HAVING A LONGITUDINAL DIMENSION GREATER THAN THAT OF EITHER SAID INLET OR OUTLET OPENINGS; AND FORMING ON OPPOSITE SIDES OF SAID SLOTS ELONGATED VALVE FACES, SAID VALVE ELEMENT DISPOSED IN SAID CAVITY BETWEEN SAID RIBS AND INLET SLOTS AND NORMALLY ARCHED AWAY FROM SAID INLET SLOTS, SAID VALVE FACES DIMENSIONED TO COVER AND SEAL SAID INLET SLOTS UPON FLATTENING SAID VALVE ELEMENT AGAINST SAID VALVE SEAT PLATE.
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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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |