US4969430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication system for two stroke engine
Assignee: Yamaha Motor Co Ltd
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Filing: 1990-01-26
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Granted: 1990-11-13
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Expires: 2010-01-26
Abstract
Abstract A lubricating system for a two cycle crankcase compression internal engine wherein lubricant is delivered to a main bearing of the crankshaft for its lubrication. The crankshaft has a throw adjacent this bearing and an oil receiving groove in a face of the throw receives oil leaking from the bearing. A cross drilled passageway delivers the accumulated oil by centrigfugal force to the connecting rod journal for its lubrication.
Inventors
- 👤 Tatsuyuki Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:44
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/06; F01M1/04; F01M9/00; F01M9/10; F16; F16C; F16C3/00; F16C3/04; F16C3/06; F16C3/14; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A lubricating system for a reciprocating machine having a crankshaft journaled for rotation within a bearing, a throw on said crankshaft adjacent said bearing, a connecting rod journaled on said throw, means for delivering lubricant to said bearing, a lubricant receiving groove formed in said crankshaft adjacent said bearing for receiving lubricant leaking therefrom and a lubricant delivery passage extending from said lubricant receiving groove to the connecting rod journal for lubricating said connecting rod.
Claim 2
Dependent Claim
75 words
A lubricating system for a reciprocating machine having a crankshaft journaled for rotation within a bearing, a throw on said crankshaft adjacent said bearing, a connecting rod journaled on said throw, means for delivering lubricant to said bearing, a lubricant receiving groove formed in said crankshaft adjacent said bearing for receiving lubricant leaking therefrom and a lubricant delivery passage extending from said lubricant receiving groove to the connecting rod journal for lubricating said connecting rod.
Claim 3
Dependent Claim
26 words
A lubricating system for a reciprocating machine as set forth in claim 1, wherein the reciprocating machine comprises a two cycle crankcase compression internal combustion engine.
Claim 4
Dependent Claim
55 words
A lubricating system for a reciprocating machine as set forth in claim 2 wherein the bearing is received within a bore of the crankshaft of the machine and the bore is formed with a counterbore adjacent the crankshaft throw, the crankshaft throw having a lip extending into said counterbore and defining the oil receiving groove.
Claim 5
Dependent Claim
26 words
A lubricating system for a reciprocating machine as set forth in claim 3, wherein the reciprocating machine comprises a two cycle crankcase compression internal combustion engine.
Claim 6
Dependent Claim
58 words
A lubricating system for a reciprocating machine as set forth in claim 4 wherein the lubricant delivery passage comprises a cross drilling in the crankshaft throw extending from the oil receiving groove to the other side of the throw enclosed by a plug, said cross drilling being intersected by a further drilling extending to the connecting rod journal.
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |