Patent US3289651A successfully refreshed from Google Patents.
US3289651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for rotary piston engines
Assignee: Yanmar Co Ltd
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Filing: 1964-12-02
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Granted: 1966-12-06
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Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Jinno Seizo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:53
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/08; F02; F02B; F02B55/00; F02B55/08; F02B55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A ROTARY PISTON ENGINE OF THE TYPE INCLUDING A CASING COMPRISED OF A CENTER HOUSING HAVING AN INNER PERIPHERAL WALL PROFILED PARALLEL TO A TWO-LOBED EPITROCHOID AND SIDE HOUSINGS ARRANGED ON OPPOSITE SIDES OF SAID CENTER HOUSING AND A GENERALLY TRIANGULAR PISTON MOUNTED IN SAID CASING FOR PLANETARY MOTION THEREIN, A COOLING DEVICE CHARACTERIZED IN THAT AT LEAST ONE OF THE SIDE HOUSINGS HAS A COOLING WATER PASSAGE FORMED THEREIN, A LUBRICANT HEAT
Claim 2
Dependent Claim
74 words
IN A ROTARY PISTON ENGINE OF THE TYPE INCLUDING A CASING COMPRISED OF A CENTER HOUSING HAVING AN INNER PERIPHERAL WALL PROFILED PARALLEL TO A TWO-LOBED EPITROCHOID AND SIDE HOUSINGS ARRANGED ON OPPOSITE SIDES OF SAID CENTER HOUSING AND A GENERALLY TRIANGULAR PISTON MOUNTED IN SAID CASING FOR PLANETARY MOTION THEREIN, A COOLING DEVICE CHARACTERIZED IN THAT AT LEAST ONE OF THE SIDE HOUSINGS HAS A COOLING WATER PASSAGE FORMED THEREIN, A LUBRICANT HEAT
References Cited (Backward Citations)
GB1011477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |