Patent US4841789A successfully refreshed from Google Patents.
US4841789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive system for driving valves and an auxiliary machine of an automotive engine
Assignee: Subaru Corp
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Filing: 1988-07-20
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Granted: 1989-06-27
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Expires: 2008-07-20
Abstract
Abstract A driving system for driving valves and an auxiliary machine has a gear train for transmitting power of an engine from a crankshaft to a drive shaft, a first belt drive device for transmitting the power from the drive shaft to a camshaft of the engine, and a second belt drive device for transmitting the power from the crankshaft to a shaft of an auxiliary machine. The first belt drive device and the second drive device are disposed on a same plane with respect to the crankshaft.
Inventors
- 👤 Katsumi Ochiai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:10
CPC Classifications
F; F02; F02B; F02B67/00; F02B67/04; F02B67/06; F01; F01L; F01L1/00; F01L1/02; F01L1/022; F01L1/024; F01L1/026; F01L1/04; F01L1/047; F01L1/053; F01L2001/0535; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2275/00; F02B2275/06; F02B2275/18; F02B2275/20; F02B75/16; F02B75/18; F02B75/24; F02B75/243
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive gear securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive gear is positioned between said engine and said crankshaft pulley; an idler gear; a driven gear meshed with said drive gear through said idler gear; a drive pulley connected coaxially to said driven gear; first means for driving said valves through said drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
Claim 2
Dependent Claim
123 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive gear securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive gear is positioned between said engine and said crankshaft pulley; an idler gear; a driven gear meshed with said drive gear through said idler gear; a drive pulley connected coaxially to said driven gear; first means for driving said valves through said drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
Claim 3
Dependent Claim
23 words
The system according to claim 1 wherein the first means comprises a belt drive device provided between the drive pulley and a camshaft.
Claim 4
Dependent Claim
23 words
The system according to claim 1 wherein the second means comprises a belt drive device provided between the crankshaft and the auxiliary machine.
Claim 5
Dependent Claim
35 words
A driving system according to claim 1, wherein said driven gear and said drive pulley are rotationally connected by a driven gear shaft, and said driven gear shaft is spaced laterally apart from said crankshaft.
Claim 6
Dependent Claim
44 words
A driving system according to claim 1, wherein said first means includes a cam driven pulley which has a diameter slightly larger than that of the drive pulley, and a toothed timing belt which engages both said cam driven pulley and said drive pulley.
Claim 7
Dependent Claim
16 words
A driving system according to claim 5, wherein said engine is a double overhead camshaft engine.
Claim 8
Dependent Claim
38 words
A driving system according to claim 1 further comprising a crankcase, and said first and second means including said crankshaft pulley and said drive pulley are disposed outside said crankcase, and said gears are mounted inside said crankcase.
Claim 9
Dependent Claim
23 words
A driving system according to claim 1, wherein said first and second means each comprises a pulley belt disposed in said common plane.
Claim 10
Dependent Claim
16 words
A driving system according to claim 1, wherein said engine is a double overhead camshaft engine.
Claim 11
Dependent Claim
125 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive pulley securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive pulley is positioned between said engine and said crankshaft pulley; a belt; a driven pulley, said belt engages said driven pulley and said drive pulley; a second drive pulley connected coaxially to said driven pulley; first means for driving said valves through said second drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
Claim 12
Dependent Claim
125 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive pulley securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive pulley is positioned between said engine and said crankshaft pulley; a belt; a driven pulley, said belt engages said driven pulley and said drive pulley; a second drive pulley connected coaxially to said driven pulley; first means for driving said valves through said second drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
Claim 13
Dependent Claim
123 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive sprocket securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive sprocket is positioned between said engine and said crankshaft pulley; a chain; a driven sprocket, said chain meshes with said drive and said driven sprockets; a driven pulley connected coaxially to said driven sprocket; first means for driving said valves through said drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
Claim 14
Dependent Claim
123 words
A driving system for driving intake and exhaust valves and auxiliary machines of an automotive engine having a crankshaft, comprising: a drive sprocket securely mounted on said crankshaft at one end thereof; a crankshaft pulley securely mounted on said crankshaft at an outermost end portion of the crankshaft whereby said drive sprocket is positioned between said engine and said crankshaft pulley; a chain; a driven sprocket, said chain meshes with said drive and said driven sprockets; a driven pulley connected coaxially to said driven sprocket; first means for driving said valves through said drive pulley; second means for driving said auxiliary machines from said crankshaft pulley; and both said first and second means are disposed in a common plane perpendicular to said crankshaft.
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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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |