Patent US4617882A successfully refreshed from Google Patents.
US4617882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for driving camshafts in an internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1984-03-09
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Granted: 1986-10-21
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Expires: 2004-03-09
Abstract
Abstract A camshaft driving apparatus for an internal combustion engine including cam gears rotatably supported by respective camshafts, a timing gear rotatably supported by a crankshaft, and a gear train having at least two intermediate gears cooperatively engaged with one another for cooperatively engaging the cam gears with the timing gear therethrough. The at least two intermediate gears are rotatably mounted to a holding member, thereby forming a single unit before mounting the intermediate gears to an engine body. The unit is thereafter mounted to the body by clamping the holding unit to the body.
Inventors
- 👤 Yutaka Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:05
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/02; F01L1/026; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F05; F05C; F05C2251/00; F05C2251/04; F05C2251/042; F05C2251/044; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A camshaft driving apparatus for a multicylinder internal combustion engine, comprising at least one cam gear mounted on at least one camshaft rotatably supported by an engine body, a timing gear mounted on a crankshaft rotatably supported by said engine body, and a gear train having at least two intermediate gears cooperatively engaged for cooperatively engine said timing gear with said cam gear therethrough, said at least two intermediate gears being rotatably mounted to holding means to thereby form an independent unit before mounting the intermediate gears to said engine body, and said independent unit being fixedly mounted to said engine body by clamping said holding means to said engine body by bolts and other clamping members wherein said independent unit is mounted to said engine body so as to be detachable therefrom and said engine body includes an opening provided between adjacent cylinders of sufficient dimensions to allow said independent unit to pass therethrough so that it can be fixedly mounted to said engine body.
Claim 2
Dependent Claim
166 words
A camshaft driving apparatus for a multicylinder internal combustion engine, comprising at least one cam gear mounted on at least one camshaft rotatably supported by an engine body, a timing gear mounted on a crankshaft rotatably supported by said engine body, and a gear train having at least two intermediate gears cooperatively engaged for cooperatively engine said timing gear with said cam gear therethrough, said at least two intermediate gears being rotatably mounted to holding means to thereby form an independent unit before mounting the intermediate gears to said engine body, and said independent unit being fixedly mounted to said engine body by clamping said holding means to said engine body by bolts and other clamping members wherein said independent unit is mounted to said engine body so as to be detachable therefrom and said engine body includes an opening provided between adjacent cylinders of sufficient dimensions to allow said independent unit to pass therethrough so that it can be fixedly mounted to said engine body.
Claim 3
Dependent Claim
23 words
The camshaft driving apparatus according to claim 1, further comprising backlash control means interposed between said crankshaft and said at least one camshaft.
Claim 4
Dependent Claim
26 words
The camshaft driving apparatus according to claim 2, wherein said backlash control means is disposed between said crankshaft and said independent unit of said intermediate gears.
Claim 5
Dependent Claim
26 words
The camshaft driving apparatus according to claim 2, wherein said backlash control means is disposed between said independent unit of said intermediate gears and said camshaft.
Claim 6
Dependent Claim
24 words
The camshaft driving apparatus according to claim 2, wherein said backlash control means comprises shims positioned between said holding member and said engine body.
Claim 7
Dependent Claim
29 words
The camshaft driving apparatus according to claim 2, wherein said backlash control means comprises a gasket positioned between a cylinder head and a cylinder block of the engine body.
Claim 8
Dependent Claim
23 words
The camshaft driving apparatus according to claim 1, wherein said engine is a V-type engine having an opening for viewing said gear train.
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |