US3319612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-cooled rotary piston engine
Assignee: Yanmar Co Ltd
•
Filing: 1965-09-27
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Granted: 1967-05-16
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Hamada Yoshitsugu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:54
CPC Classifications
F; F02; F02B; F02B55/00; F02B55/08; F02B55/10; F02B53/00; F02B55/02; F02B55/04; F02B55/06; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A WATER-COOLED ROTARY PISTON ENGINE OF THE TYPE INCLUDING A HOUSING COMPRISED OF A SHELL, THE INNER SURFACE OF WHICH HAS A MULTI-LOBED PROFILE APPROXIMATING AN EPITROCHOID, AND END WALLS SECURED TO SAID SHELL AT ITS OPPOSITE ENDS, AN ENGINE SHAFT EXTENDING AXIALLY THROUGH SAID HOUSING AND INCLUDING AN ECCENTRIC PORTION BETWEEN SAID END WALLS THEREOF AND A PISTON MOUNTED ON SAID ECCENTRIC PORTION OF SAID ENGINE SHAFT AND ADAPTED TO ROTATE IN THE SAME DIRECTION AS SAID ENGINE SHAFT AT A PREDETERMINED REVOLUTION RATIO THERETO, SAID PISTON HAVING AN APPROXIMATELY POLYGONAL TRANSVERSE CROSS SECTION DEFINING APEX PORTIONS SLIDABLE ALONG THE INNER SURFACE OF SAID SHELL, MEANS FOR WATER-COOLING SAID SHELL AND END WALLS OF SAID HOUSING AND MEANS FOR CIRCULATING A FUEL-AIR MIXTURE THROUGH SAID PISTON.
Claim 2
Dependent Claim
127 words
A WATER-COOLED ROTARY PISTON ENGINE OF THE TYPE INCLUDING A HOUSING COMPRISED OF A SHELL, THE INNER SURFACE OF WHICH HAS A MULTI-LOBED PROFILE APPROXIMATING AN EPITROCHOID, AND END WALLS SECURED TO SAID SHELL AT ITS OPPOSITE ENDS, AN ENGINE SHAFT EXTENDING AXIALLY THROUGH SAID HOUSING AND INCLUDING AN ECCENTRIC PORTION BETWEEN SAID END WALLS THEREOF AND A PISTON MOUNTED ON SAID ECCENTRIC PORTION OF SAID ENGINE SHAFT AND ADAPTED TO ROTATE IN THE SAME DIRECTION AS SAID ENGINE SHAFT AT A PREDETERMINED REVOLUTION RATIO THERETO, SAID PISTON HAVING AN APPROXIMATELY POLYGONAL TRANSVERSE CROSS SECTION DEFINING APEX PORTIONS SLIDABLE ALONG THE INNER SURFACE OF SAID SHELL, MEANS FOR WATER-COOLING SAID SHELL AND END WALLS OF SAID HOUSING AND MEANS FOR CIRCULATING A FUEL-AIR MIXTURE THROUGH SAID PISTON.
References Cited (Backward Citations)
CA650233A
Cited
US2947290A
Cited
US3012550A
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US3102682A
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GB940826A
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US3112870A
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DE1155633B
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |