US3207140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel pump
Assignee: HARTFORD MACHINE SCREW CO
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Filing: 1962-09-10
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Granted: 1965-09-21
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Vernon D Roosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:27
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/14; F02M41/1405; F02M41/1411; F02M41/1427; F02M41/1416; F02M2041/1438; F02M2041/1444; F02M2041/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
IN A FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES OF THE TYPES COMPRISING A CHANGE PUMP DRIVEN BY THE ENGINE AND SUPPLYING FUEL TO THE ENGINE AND A TRANSFER PUMP DRIVEN BY THE ENGINE FOR SUPPLYING FUEL TO THE CHANGE PUMP, A FUEL METERING VALVE DISPOSED BETWEEN THE CHANGE AND TRANSFER PUMPS FOR VARYING THE AMOUNT OF FUEL DELIVERED TO THE CHARGE PUMP AND THEREBY CONTROLLING THE SPEED OF THE ENGINE COMPRISING A BODY HAVING A PASSAGEWARY COMMUNICATING WITH THE TRANSFER PUMP AND A METERING OUTLET PORT COMMUNICATING WITH THE CHARGE PUMP, A VALVE MEMBER MOVABLE IN SAID PASSAGEWAY FOR INCREASING AND DECREASING THE EFFECTIVE SIZE OF THE METERING OUTLET PORT DEPENDENT UPON THE POSITION OF THE VALVE MEMBER, THE VALVE MEMBER BEING APERTURED FROM END TO END AND HAVING AN OUTER SURFACE SUBJECTED TO THE PRESSURE OF FUEL IN THE PASSAGEWAY TENDING TO MOVE THE VALVE MEMBER SO AS TO DECREASE THE EFFECTIVE SIZE OF THE METERING OUTLET PORT, A FIRST SPRING OPPOSING MOVEMENT OF THE VALVE MEMBER IN RESPONSE TO SAID PRESSURE AND A SECOND SPRING ACTING IN OPPOSITION TO THE FIRST SPRING FOR MODIFYING THE SPRING FORCE ACTING ON THE VALVE MEMBER.
Claim 2
Dependent Claim
195 words
IN A FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES OF THE TYPES COMPRISING A CHANGE PUMP DRIVEN BY THE ENGINE AND SUPPLYING FUEL TO THE ENGINE AND A TRANSFER PUMP DRIVEN BY THE ENGINE FOR SUPPLYING FUEL TO THE CHANGE PUMP, A FUEL METERING VALVE DISPOSED BETWEEN THE CHANGE AND TRANSFER PUMPS FOR VARYING THE AMOUNT OF FUEL DELIVERED TO THE CHARGE PUMP AND THEREBY CONTROLLING THE SPEED OF THE ENGINE COMPRISING A BODY HAVING A PASSAGEWARY COMMUNICATING WITH THE TRANSFER PUMP AND A METERING OUTLET PORT COMMUNICATING WITH THE CHARGE PUMP, A VALVE MEMBER MOVABLE IN SAID PASSAGEWAY FOR INCREASING AND DECREASING THE EFFECTIVE SIZE OF THE METERING OUTLET PORT DEPENDENT UPON THE POSITION OF THE VALVE MEMBER, THE VALVE MEMBER BEING APERTURED FROM END TO END AND HAVING AN OUTER SURFACE SUBJECTED TO THE PRESSURE OF FUEL IN THE PASSAGEWAY TENDING TO MOVE THE VALVE MEMBER SO AS TO DECREASE THE EFFECTIVE SIZE OF THE METERING OUTLET PORT, A FIRST SPRING OPPOSING MOVEMENT OF THE VALVE MEMBER IN RESPONSE TO SAID PRESSURE AND A SECOND SPRING ACTING IN OPPOSITION TO THE FIRST SPRING FOR MODIFYING THE SPRING FORCE ACTING ON THE VALVE MEMBER.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |