Patent DE335571C successfully refreshed from Google Patents.
Patent US3382812A successfully refreshed from Google Patents.
US3382812A
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Variable positive displacement pump
Assignee: Gorman Rupp Industries Inc
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Filing: 1966-09-27
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Granted: 1968-05-14
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Edward M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:46
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/02; F04B53/00; F04B53/14; F04B7/00; F04B7/04; F04B7/06; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A VARIABLE POSITIVE DISPLACEMENT PUMP COMPRISING A DRIVE SHAFT HAVING A CRANK ARM, A CYLINDER HAVING LATERAL FLOW DUCTS AND A CLOSED END, A PISTON IN SAID CYLINDER HAVING A CRANK ARM, MEANS ADJUSTABLY MOUNTING SAID CYLINDER FOR VARYING THE ANGULARITY BETWEEN THE DRIVE SHAFT AND THE PISTON, AND FLEXIBLE HINGE MEANS CONNECTING THE OUTER ENDS OF SAID CRANK ARMS.
Claim 2
Dependent Claim
60 words
A VARIABLE POSITIVE DISPLACEMENT PUMP COMPRISING A DRIVE SHAFT HAVING A CRANK ARM, A CYLINDER HAVING LATERAL FLOW DUCTS AND A CLOSED END, A PISTON IN SAID CYLINDER HAVING A CRANK ARM, MEANS ADJUSTABLY MOUNTING SAID CYLINDER FOR VARYING THE ANGULARITY BETWEEN THE DRIVE SHAFT AND THE PISTON, AND FLEXIBLE HINGE MEANS CONNECTING THE OUTER ENDS OF SAID CRANK ARMS.
References Cited (Backward Citations)
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Cited
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Cited
FR542213A
Cited
GB589462A
Cited
US2702510A
Cited
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Cited
US3142258A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |