US3200798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines and pistons therefor
Assignee: British Internal Combustion Engine Research Institute
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Filing: 1965-01-12
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Granted: 1965-08-17
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Expires: 1985-01-12
Abstract
No abstract record available.
Inventors
- 👤 Mansfield Wilfred Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/04; F02B75/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
IN A TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE THE IMPROVEMENT COMPRISING THE PROVIDION OF A PISTON COMPRISING A FIRST MAIN PART AND A SECOND MAIN PART AXIALLY MOVEABLE WITH RESPECT TO SAID FIRST MAIN PART, SAID FIRST MAIN PART FORMING AT LEAST PART OF THE CROWN OF THE PISTON, MEANS FOR CONNECTING SAID SECOND MAIN PART TO THE ENGINE OUTPUT SHAFT AND AN EXPANSIBLE AND CONTRACTIBLE CHAMBER BETWEEN SAID MAIN PARTS, A FIRST PASSAGE IN SAID SECOND MAIN PART FOR CONDUCTING FLUID FROM A PASSAGE IN THE SAID CONNECTING MEANS TO SAID CHAMBER, A SECOND PASSAGE IN SAID SECOND MAIN PART FOR CONDUCTING FLUID FROM SAID CHAMBER TO THE EXTERIOR OF SAID PISTON AT THE END OPPOSITE TO THE CROWN, A SPRING LOADED PRESSURE RELIEF VALVE IN SAID SECOND PASSAGE TO CONTROL FLOW OF FLUID FROM SAID CHAMBER, AND A PUMP CONNECTED ON ITS INLET SIDE THROUGH A NON-RETURN SUCTION VALVE TO SAID FIRST PASSAGE AND ON ITS OUTLET SIDE THROUGH A NONRETURN DISCHARGE VALVE TO SAID CHAMBER, AND MEANS RE-
Claim 2
Dependent Claim
170 words
IN A TWO-STROKE CYCLE INTERNAL COMBUSTION ENGINE THE IMPROVEMENT COMPRISING THE PROVIDION OF A PISTON COMPRISING A FIRST MAIN PART AND A SECOND MAIN PART AXIALLY MOVEABLE WITH RESPECT TO SAID FIRST MAIN PART, SAID FIRST MAIN PART FORMING AT LEAST PART OF THE CROWN OF THE PISTON, MEANS FOR CONNECTING SAID SECOND MAIN PART TO THE ENGINE OUTPUT SHAFT AND AN EXPANSIBLE AND CONTRACTIBLE CHAMBER BETWEEN SAID MAIN PARTS, A FIRST PASSAGE IN SAID SECOND MAIN PART FOR CONDUCTING FLUID FROM A PASSAGE IN THE SAID CONNECTING MEANS TO SAID CHAMBER, A SECOND PASSAGE IN SAID SECOND MAIN PART FOR CONDUCTING FLUID FROM SAID CHAMBER TO THE EXTERIOR OF SAID PISTON AT THE END OPPOSITE TO THE CROWN, A SPRING LOADED PRESSURE RELIEF VALVE IN SAID SECOND PASSAGE TO CONTROL FLOW OF FLUID FROM SAID CHAMBER, AND A PUMP CONNECTED ON ITS INLET SIDE THROUGH A NON-RETURN SUCTION VALVE TO SAID FIRST PASSAGE AND ON ITS OUTLET SIDE THROUGH A NONRETURN DISCHARGE VALVE TO SAID CHAMBER, AND MEANS RE-
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |