Patent US1697905A successfully refreshed from Google Patents.
Patent US3304880A successfully refreshed from Google Patents.
US3304880A
Expired / Lapsed
US
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Pump and diaphragm plunger sub-assembly
Assignee: Motors Liquidation Co
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Filing: 1964-11-06
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Granted: 1967-02-21
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Gold John
- 👤 Toschkoff Dimitar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:23
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/438; F02M2700/4388; F02M2700/439
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A FUEL PUMP INCLUDING A HOUSING, A DIAPHRAGM OF YEILDING FLEXIBLE MATERIAL COOPERATING WITH SAID HOUSING IN DEFINING A PUMPING CHAMBER, TWO STIFF RETAINER PLATES, ONE OF SAID PLATES HAVING A LARGE ANNULAR RIDGE EXTENDING INTO SAID PUMPING CHAMBER,A SMALL ANNULAR RIDGE ON THE OTHER OF SAID PLATES, A COILED SPRING IN SAID HOUSING HAVING ONE END CENTERED BY SAID SMALL ANNULAR RIDGE, A PLUNGER EXTENDING THROUGH SAID COILED SPRING, PLATES AND DIAPHRAGM, AN ANNULAR BEAD ON SAID DIAPHRAGM CLOSELY SURROUNDING SAID PLUNGER AND CONTRIBUTING TO THE IMMEDIATE THICKNESS OF SAID DIAPHGRAM, AND MEANS ON SAID PLUNGER URGING SAID PLATES INTO CLAMPING RELATION WITH SAID BEAD AND SAID DIAPHRAGM SO THAT CREEPING OF SAID DIAPHRAGM MATERIAL BETWEEN SAID PLATES IS MINIMIZED.
Claim 2
Dependent Claim
121 words
A FUEL PUMP INCLUDING A HOUSING, A DIAPHRAGM OF YEILDING FLEXIBLE MATERIAL COOPERATING WITH SAID HOUSING IN DEFINING A PUMPING CHAMBER, TWO STIFF RETAINER PLATES, ONE OF SAID PLATES HAVING A LARGE ANNULAR RIDGE EXTENDING INTO SAID PUMPING CHAMBER,A SMALL ANNULAR RIDGE ON THE OTHER OF SAID PLATES, A COILED SPRING IN SAID HOUSING HAVING ONE END CENTERED BY SAID SMALL ANNULAR RIDGE, A PLUNGER EXTENDING THROUGH SAID COILED SPRING, PLATES AND DIAPHRAGM, AN ANNULAR BEAD ON SAID DIAPHRAGM CLOSELY SURROUNDING SAID PLUNGER AND CONTRIBUTING TO THE IMMEDIATE THICKNESS OF SAID DIAPHGRAM, AND MEANS ON SAID PLUNGER URGING SAID PLATES INTO CLAMPING RELATION WITH SAID BEAD AND SAID DIAPHRAGM SO THAT CREEPING OF SAID DIAPHRAGM MATERIAL BETWEEN SAID PLATES IS MINIMIZED.
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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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |