US4664228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication system for a vertical shaft engine
Assignee: Kubota Corp
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Filing: 1985-10-15
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Granted: 1987-05-12
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Expires: 2005-10-15
Abstract
Abstract A lubrication system for a vertical shaft engine includes a crank case having an upper and a lower wall, a vertical crank shaft, a vertical balancing shaft, each pair of upper and lower bosses formed in said upper and lower walls for rotatably supporting these shafts an oil pump having a drive shaft housed in a lower boss for supporting said balancing shaft, and adopted to be driven by said balancing shaft, and an oil feeding passage for feeding lubricating oil from said pump to any part desired to be lubricated in said engine.
Inventors
- 👤 Yasunori Hashigaki
- 👤 Tatsutoshi Umeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:56
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/02; F02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A lubrication system for a vertical shaft engine comprising a crank case having an upper and a lower wall, a vertical crank shaft, a vertical balancing shaft, a plurality of upper and lower bosses formed in said upper and lower walls for rotatably supporting said shafts, an oil pump housed in said lower wall, and an oil feeding passage for feeding lubricating oil from said pump to any part desired to be lubricated in said engine, wherein the improvement comprises: said pump having a drive shaft housed under said balancing shaft, the lower end of said balancing shaft housed in one of said lower losses, said balancing shaft being rotatably supported by an antifriction bearing; said antifriction bearing being held in an upper part of said one lower boss; said one lower boss protruding upward from said lower wall; said drive shaft connected to the lower end of said balancing shaft and; said pump being housed in a lower part of said one lower boss above said lower wall.
Claim 2
Dependent Claim
169 words
A lubrication system for a vertical shaft engine comprising a crank case having an upper and a lower wall, a vertical crank shaft, a vertical balancing shaft, a plurality of upper and lower bosses formed in said upper and lower walls for rotatably supporting said shafts, an oil pump housed in said lower wall, and an oil feeding passage for feeding lubricating oil from said pump to any part desired to be lubricated in said engine, wherein the improvement comprises: said pump having a drive shaft housed under said balancing shaft, the lower end of said balancing shaft housed in one of said lower losses, said balancing shaft being rotatably supported by an antifriction bearing; said antifriction bearing being held in an upper part of said one lower boss; said one lower boss protruding upward from said lower wall; said drive shaft connected to the lower end of said balancing shaft and; said pump being housed in a lower part of said one lower boss above said lower wall.
Claim 3
Dependent Claim
21 words
A lubricating system recited in claim 1, wherein a part of said oil feeding passage is formed through said balancing shaft.
Claim 4
Dependent Claim
26 words
A lubricating system recited in claim 1, wherein a part of said oil feeding passage is formed in the lower half part of said crank shaft.
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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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |