US3664774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer pump
Assignee: Dexter Automatic Products Co
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Filing: 1970-05-05
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Granted: 1972-05-23
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Expires: 1990-05-05
Abstract
Abstract A FUEL PRIMER PUMP ESPECIALLY ADAPTED FOR USE IN CONNECTION WITH INTERNAL COMBUSTION ENGINES FOR VEHICLES SUCH AS SNOWMOBILES AND THE LIKE. THE PRIMER PUMP INCLUDES A FUEL THROUGH THE PUMP TO ONE DIRECTION OF FLOW ONLY, AND FUEL THROUGH THE PUMP TO ONE DIRECTION OF FLOW ONLY, AND THE VALVE ELEMENT AND THE PUMP PLUNGER ARE ARRANGED SO THAT A PRESSURE DROP AT THE DISCHARGE END OF THE PUMP INDUCED BY OPERATING CONDITIONS OF THE INTERNAL COMBUSTION ENGINE WILL BE EFFECTIVE TO INDUCE UNDESIRED FLOW OF FUEL THROUGH THE PUMP TO FLOOD THE ENGINE.
Inventors
- 👤 Willis E Tupper
- 👤 John R Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:26
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/14; F02; F02M; F02M1/00; F02M1/16; F04B53/00; F04B53/10; F04B53/109; F04B53/1092; F04B9/02; F04B9/06; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/144; F16K15/147; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7843; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |