US3247799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection pump control system
Assignee: Stanadyne LLC
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Filing: 1963-05-31
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Granted: 1966-04-26
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Vernon D Roosa
- 👤 Michael A Virello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
F; F02; F02M; F02M63/00; F02D; F02D1/00; F02M41/00; F02M41/08; F02M41/14; F02M41/1405; F02M41/1411; F02M41/1427; F02M55/00; F02M59/00; F02M59/38; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02M2041/1438; F02M2041/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A FUEL INJECTION SYSTEM OF MASTER AND SLAVE FUEL PUMPS IN WHICH EACH PUMP HAS A CHARGE PUMP PROVIDING FUEL CHARGES WITH A MEASURE DEPENDENT UPON THE FUEL PRESSURE IN THE CHARGE PUMP INLET AND A CHARGE PUMP BACK PRESSURE, AND A METERING VALVE HAVING AN INLET CONNECTED TO A FUEL SOURCE AND AN OUTLET CONNECTED TO THE CHARGE PUMP INLET CONTROLLABLE FOR VARYING THE FUEL PRESSURE IN THE CHARGE PUMP INLET, A SLAVE PUMP CONTROL COMPRISING, CONDUIT MEANS PROVIDING OPEN COMMUNICATION BETWEEN THE MASTER AND SLAVE PUMPS FOR EQUALIZING THE CHARGE PUMP BACK PRESSURES OF THE MASTER AND SLAVE PUMPS, MEANS FOR EQUALIZING THE FUEL PRESSURES IN THE METERING VALVE INLETS OF THE MASTER AND SLAVE PUMPS,
Claim 2
Dependent Claim
119 words
IN A FUEL INJECTION SYSTEM OF MASTER AND SLAVE FUEL PUMPS IN WHICH EACH PUMP HAS A CHARGE PUMP PROVIDING FUEL CHARGES WITH A MEASURE DEPENDENT UPON THE FUEL PRESSURE IN THE CHARGE PUMP INLET AND A CHARGE PUMP BACK PRESSURE, AND A METERING VALVE HAVING AN INLET CONNECTED TO A FUEL SOURCE AND AN OUTLET CONNECTED TO THE CHARGE PUMP INLET CONTROLLABLE FOR VARYING THE FUEL PRESSURE IN THE CHARGE PUMP INLET, A SLAVE PUMP CONTROL COMPRISING, CONDUIT MEANS PROVIDING OPEN COMMUNICATION BETWEEN THE MASTER AND SLAVE PUMPS FOR EQUALIZING THE CHARGE PUMP BACK PRESSURES OF THE MASTER AND SLAVE PUMPS, MEANS FOR EQUALIZING THE FUEL PRESSURES IN THE METERING VALVE INLETS OF THE MASTER AND SLAVE PUMPS,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |