US3673991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1970-05-22
•
Granted: 1972-07-04
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Expires: 1990-05-22
Abstract
Abstract The detailed description and specification of this invention discloses a new four-stroke cycle internal combustion engine which is a new combination of previously used practices and a new method of inducting a charge into a cylinder in the course of an intake stroke. This method inducts a much greater charge, at a given high speed of the engine, than that inducted into any of today''s engines of the same displacement, without the use of a supercharger, and eliminates the intake valves and the valve linkage used in conventional engines.
Inventors
- 👤 John Winn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:45
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/26; F01; F01B; F01B3/00; F01B3/04; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A multi-cylinder four-stroke cycle internal combustion engine having a cylinder closed at its top, a piston slidable therein, an exhaust valve at the top of said cylinder, an intake port located in the lower portion of the wall of said cylinder, a drive shaft spaced apart from and parallel to the longitudinal axis of said cylindEr, cam means circumferencially mounted on said shaft interacting between said shaft and said piston to control the four phases of said four-stroke cycle, a cam surface of said cam means being shaped to provide an intake phase of longer duration than any other phase of said four-stroke cycle, and to provide a substantial interval during the intake phase during which said piston remains at rest at the end of the intake phase while said shaft is rotating, said substantial interval being longer than the interval at the end of any of the other phases of said four-stroke cycle.
Claim 2
Dependent Claim
154 words
A multi-cylinder four-stroke cycle internal combustion engine having a cylinder closed at its top, a piston slidable therein, an exhaust valve at the top of said cylinder, an intake port located in the lower portion of the wall of said cylinder, a drive shaft spaced apart from and parallel to the longitudinal axis of said cylindEr, cam means circumferencially mounted on said shaft interacting between said shaft and said piston to control the four phases of said four-stroke cycle, a cam surface of said cam means being shaped to provide an intake phase of longer duration than any other phase of said four-stroke cycle, and to provide a substantial interval during the intake phase during which said piston remains at rest at the end of the intake phase while said shaft is rotating, said substantial interval being longer than the interval at the end of any of the other phases of said four-stroke cycle.
Claim 3
Dependent Claim
51 words
An internal combustion engine as defined in claim 1 including said cam surface shaped to cause said piston to expose said intake port for an interval during said cycle, said intake port being closed during the remainder of said cycle, and an exhaust valve cam circumferencially mounted on said drive shaft.
References Cited (Backward Citations)
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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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |