Patent US3382853A successfully refreshed from Google Patents.
US3382853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle engine having crankcase scavenging
Assignee: Yamaha Motor Co Ltd
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Filing: 1966-12-13
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Granted: 1968-05-14
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Expires: 1986-12-13
Abstract
No abstract record available.
Inventors
- 👤 Kinoshita Isoroku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:25
CPC Classifications
F; F02; F02B; F02B25/00; F02B2700/00; F02B2700/03; F02B2700/031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A TWO-CYCLE ENGINE WITH CRANKCASE SCAVENGING HAVING AN INLET PORT CONNECTING AN INTAKE PASSAGE WHICH PASSES MIXTURE OR AIR TO A CRANKCASE AND AN INTAKE VALVE ADAPTED TO CLOSE AND UNCLOSE SAID INLET PORT IN ASSOCIATION WITH THE PISTON STROKE FOR EACH PISTON-CYLINDER ASSEMBLY, FEATURING A BLOWBACK PREVENTER CONSISTING OF THE INTAKE PASSAGE AND A CHECK VALVE DISPOSED IN SAID INTAKE PASSAGE FOR PREVENTING BLOWBACK OF FUEL MIXTURE OR CLEAN AIR FROM THE CRANKCASE, SAID CHECK VALVE EXHIBITING SMALL RESISTANCE AGAINST FUEL MIXTURE TO BE SUCKED IN THE CRANKCASE.
Claim 2
Dependent Claim
89 words
A TWO-CYCLE ENGINE WITH CRANKCASE SCAVENGING HAVING AN INLET PORT CONNECTING AN INTAKE PASSAGE WHICH PASSES MIXTURE OR AIR TO A CRANKCASE AND AN INTAKE VALVE ADAPTED TO CLOSE AND UNCLOSE SAID INLET PORT IN ASSOCIATION WITH THE PISTON STROKE FOR EACH PISTON-CYLINDER ASSEMBLY, FEATURING A BLOWBACK PREVENTER CONSISTING OF THE INTAKE PASSAGE AND A CHECK VALVE DISPOSED IN SAID INTAKE PASSAGE FOR PREVENTING BLOWBACK OF FUEL MIXTURE OR CLEAN AIR FROM THE CRANKCASE, SAID CHECK VALVE EXHIBITING SMALL RESISTANCE AGAINST FUEL MIXTURE TO BE SUCKED IN THE CRANKCASE.
References Cited (Backward Citations)
USRE19949E
Cited
GB764735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |