US3882832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating cam device for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1974-07-16
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Granted: 1975-05-13
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Expires: 1994-07-16
Abstract
Abstract Three cam lobes formed integrally with a rotary camshaft are employed for operating the valves of a three-valve internal combustion piston engine. The center cam is made larger than one of the other cams in every radial direction to facilitate grinding of the external cam surfaces.
Inventors
- 👤 Kiyoshi Ohsaki
- 👤 Morio Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:31
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/26; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
86 words
For use with an internal combustion piston engine having a main combustion chamber provided with a main intake valve and an exhaust valve, and having an auxiliary combustion chamber provided with an auxiliary intake valve, the improvement comprising: a rotary camshaft having three axially spaced cam lobes integrally formed thereon for actuating said three valves, respectively, one cam lobe being positioned between the other two cam lobes and having greater radial dimensions than one of the other cam lobes at every angular position of the shaft.
Claim 2
Dependent Claim
86 words
For use with an internal combustion piston engine having a main combustion chamber provided with a main intake valve and an exhaust valve, and having an auxiliary combustion chamber provided with an auxiliary intake valve, the improvement comprising: a rotary camshaft having three axially spaced cam lobes integrally formed thereon for actuating said three valves, respectively, one cam lobe being positioned between the other two cam lobes and having greater radial dimensions than one of the other cam lobes at every angular position of the shaft.
Claim 3
Dependent Claim
86 words
For use with an internal combustion piston engine having a main combustion chamber provided with a main intake valve and an exhaust valve, and having an auxiliary combustion chamber provided with an auxiliary intake valve, the improvement comprising: a rotary camshaft having three axially spaced cam lobes integrally formed thereon for actuating said three valves, respectively, one cam lobe being positioned between the other two cam lobes and having a silhouette larger than one of the other cam lobes at every angular position of the shaft.
Claim 4
Dependent Claim
86 words
For use with an internal combustion piston engine having a main combustion chamber provided with a main intake valve and an exhaust valve, and having an auxiliary combustion chamber provided with an auxiliary intake valve, the improvement comprising: a rotary camshaft having three axially spaced cam lobes integrally formed thereon for actuating said three valves, respectively, one cam lobe being positioned between the other two cam lobes and having a silhouette larger than one of the other cam lobes at every angular position of the shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |