Patent US3274982A successfully refreshed from Google Patents.
US3274982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle two-cylinder internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1964-09-23
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Granted: 1966-09-27
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Expires: 1984-09-23
Abstract
No abstract record available.
Inventors
- 👤 Noguchi Masaaki
- 👤 Sakakibara Shigeru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:24
CPC Classifications
F; F01; F01B; F01B9/00; F01B9/04; F01B9/06; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222; F01B2009/061; F01B2009/065; F02B75/02; F02B2075/022; F02B2075/025; F02B2075/1804; F02B2075/1816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A TWO-CYCLE TWO-CYLINDER INTERNAL COMBUSTION ENGINE COMPRISING AN ENGINE SHAFT, A CONTROL CAM OF DOUBLE LOBED COCOON SHAPE FIXED TO SAID ENGINE SHAFT, TWO OPPOSED ENGINE CYLINDERS EACH HAVING A PISTON, TWO OPPOSED FEED PUMP CYLINDERS EACH HAVING A PISTON, SAID OPPOSED CYLINDERS BEING ARRANGED RADIALLY WITH RESPECT TO THE ENGINE SHAFT IN A CRUCIFORM, A PISTON ROD OF EACH OF SAID PISTONS IN THE SAID FOUR CYLINDERS, EACH PISTON ROD BEING PROVIDED ON ITS INNER END WITH A ROTATABLE ANTIFRCITION ROLLER, AND A LINKAGE CONNECTING THE AXES OF SAID FOUR ANTIFRICTION ROLLERS TO FORM A PARALLELOGRAM AND ADAPTED TO HOLD SAID FOUR ANTIFRICTION ROLLERS IN ROLLING CONTACT WITH THE COCOON SHAPED CAM EDGE OF SAID CONTROL CAM ON THE ENGINE SHAFT.
Claim 2
Dependent Claim
122 words
A TWO-CYCLE TWO-CYLINDER INTERNAL COMBUSTION ENGINE COMPRISING AN ENGINE SHAFT, A CONTROL CAM OF DOUBLE LOBED COCOON SHAPE FIXED TO SAID ENGINE SHAFT, TWO OPPOSED ENGINE CYLINDERS EACH HAVING A PISTON, TWO OPPOSED FEED PUMP CYLINDERS EACH HAVING A PISTON, SAID OPPOSED CYLINDERS BEING ARRANGED RADIALLY WITH RESPECT TO THE ENGINE SHAFT IN A CRUCIFORM, A PISTON ROD OF EACH OF SAID PISTONS IN THE SAID FOUR CYLINDERS, EACH PISTON ROD BEING PROVIDED ON ITS INNER END WITH A ROTATABLE ANTIFRCITION ROLLER, AND A LINKAGE CONNECTING THE AXES OF SAID FOUR ANTIFRICTION ROLLERS TO FORM A PARALLELOGRAM AND ADAPTED TO HOLD SAID FOUR ANTIFRICTION ROLLERS IN ROLLING CONTACT WITH THE COCOON SHAPED CAM EDGE OF SAID CONTROL CAM ON THE ENGINE SHAFT.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |