Patent US3131678A successfully refreshed from Google Patents.
US3131678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve gears for rotary-piston explosion engines
Assignee: Renault SA
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Filing: 1961-12-26
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Granted: 1964-05-05
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:47
CPC Classifications
F; F02; F02B; F02B53/00; F02B2053/005; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
VALVE GEAR OF FOUR-STROKE ROTARY-PISTON EXPLOSION ENGINE HAVING A STATOR FORMED WITH THREE LOBES CONSTITUTING WORKING CHAMBERS SHIFTED ANGULARLY BY 120 DEGREES FROM EACH OTHER ABOUT THE AXIS, AND A PISTON-FORMING ROTOR FORMED WITH TWO OPPOSITE LOBES OF EPICYCLIC CONFIGURATION CONJUGATED WITH THAT OF THE STATOR AND REVOLVING ECCENTRICALLY ON A CRANKSHAFT REVOLVING AT A SPEED TWICE THAT OF THE ROTOR BUT IN THE OPPOSITE DIRECTION, CHARACTERIZED IN THAT THE INLET AND EXHAUST VALVES OPENING IN COMBUSTION CHAMBERS ADJACENT TO THE WORKING CHAMBER ARE CONTROLLED BY ROCKERS DISPOSED RADIALLY AT 120 DEGREES FROM EACH OTHER BY MEANS OF A SINGLE CAM FORMED WITH A SINGLE LOBE AND REVOLVING AT THE SAME SPEED AND IN THE SAME DIRECTION AS THE ROTOR.
Claim 2
Dependent Claim
120 words
VALVE GEAR OF FOUR-STROKE ROTARY-PISTON EXPLOSION ENGINE HAVING A STATOR FORMED WITH THREE LOBES CONSTITUTING WORKING CHAMBERS SHIFTED ANGULARLY BY 120 DEGREES FROM EACH OTHER ABOUT THE AXIS, AND A PISTON-FORMING ROTOR FORMED WITH TWO OPPOSITE LOBES OF EPICYCLIC CONFIGURATION CONJUGATED WITH THAT OF THE STATOR AND REVOLVING ECCENTRICALLY ON A CRANKSHAFT REVOLVING AT A SPEED TWICE THAT OF THE ROTOR BUT IN THE OPPOSITE DIRECTION, CHARACTERIZED IN THAT THE INLET AND EXHAUST VALVES OPENING IN COMBUSTION CHAMBERS ADJACENT TO THE WORKING CHAMBER ARE CONTROLLED BY ROCKERS DISPOSED RADIALLY AT 120 DEGREES FROM EACH OTHER BY MEANS OF A SINGLE CAM FORMED WITH A SINGLE LOBE AND REVOLVING AT THE SAME SPEED AND IN THE SAME DIRECTION AS THE ROTOR.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |