US4010718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating piston engines having piston oil cooling
Assignee: Perkins Ltd
•
Filing: 1975-01-27
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Granted: 1977-03-08
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Expires: 1995-01-27
Abstract
Abstract A reciprocating piston engine in which oil cooling is provided by a hollow oil jet assembly located accurately by a location tool and pressed into position in a bore in the crankcase of the engine. Accurately drilled and aligned jet passages are formed in the assembly which is then fitted into position with good accuracy to enable accurate direction of a jet or jets of cooling oil to a desired point or points on the underside of a piston.
Inventors
- 👤 William Findlay Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:13
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/08; F01P; F01P3/00; F01P3/06; F01P3/08; F01M2001/086; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A reciprocating piston engine comprising a cylinder block having a cylinder therein, a piston reciprocable in the cylinder, a crankcase, a crank rotatable on a bearing in the crankcase, a connecting rod connecting the crank to the piston, a lubricating oil passage in said crankcase, a bore formed in said crankcase between the bearing and said cylinder and meeting said oil passage, a tubular jet assembly, locating means on said jet assembly for accurately positioning said jet assembly within the engine and said jet assembly having an interference fit with said bore to retain said jet assembly's position in said bore in said crankcase, said jet assembly having a hollow interior connected to said oil passage and a jet passage accurately formed and positioned prior to assembly in said bore.
Claim 2
Dependent Claim
130 words
A reciprocating piston engine comprising a cylinder block having a cylinder therein, a piston reciprocable in the cylinder, a crankcase, a crank rotatable on a bearing in the crankcase, a connecting rod connecting the crank to the piston, a lubricating oil passage in said crankcase, a bore formed in said crankcase between the bearing and said cylinder and meeting said oil passage, a tubular jet assembly, locating means on said jet assembly for accurately positioning said jet assembly within the engine and said jet assembly having an interference fit with said bore to retain said jet assembly's position in said bore in said crankcase, said jet assembly having a hollow interior connected to said oil passage and a jet passage accurately formed and positioned prior to assembly in said bore.
Claim 3
Dependent Claim
47 words
An engine as claimed in claim 1 wherein said tubular assembly includes two jet passages and the assembly protrudes from both sides of a through bore in a crankcase partition to enable each jet passage to be presented to one of adjacent cylinders separated by said partition.
Claim 4
Dependent Claim
19 words
An engine as claimed in claim 2 wherein at least two jet assemblies provide cooling oil for every piston.
Claim 5
Dependent Claim
32 words
An engine as claimed in claim 3 wherein each jet assembly is provided with at least three jet passages, oil from at least two of said passages being directed at one piston.
Claim 6
Dependent Claim
47 words
An engine as claimed in claim 1 and particularly in the case of a diesel engine, wherein said jet passage is so orientated as to project a stream of oil at the part of the underside of the piston which is axially aligned with the combustion chamber.
Claim 7
Dependent Claim
23 words
An engine as claimed in claim 1 wherein said jet assembly is in an interconnecting wall connecting the crank bearing to the cylinder.
References Cited (Backward Citations)
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |