US3795229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine valve lifter guide
Assignee: Caterpillar Inc
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Filing: 1972-12-26
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Granted: 1974-03-05
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Expires: 1992-12-26
Abstract
Abstract A roller-type valve lifter is mounted in an internal combustion engine to reciprocate a push rod in response to rotation of an engine driven cam shaft. A guide and anti-rotation device for the valve lifter comprises a vertically-disposed leg which seats in a slot formed on the valve lifter and a pair of cylindrically shaped arms, extending horizontally from opposite edges of the leg, which seat in a circumferential groove also formed on the valve lifter. A hook, connected to an upper end of the leg by a reverse bend, seats in a bore formed in the cylinder block.
Inventors
- 👤 R Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:52
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L2307/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
In an internal combustion engine, a stationary support member, a valve lifter reciprocally mounted in a bore formed in said support member and having a first vertically disposed groove and a second circumferentially disposed groove formed thereon, a one-piece valve lifter guide comprising a vertically disposed first guide portion disposed in said first groove and a pair of arcuately shaped second guide portions extending horizontally from opposite edges of said first guide portion and disposed in said second groove, and anti-rotation means for preventing rotation of said valve lifter relative to said stationary support member.
Claim 2
Dependent Claim
95 words
In an internal combustion engine, a stationary support member, a valve lifter reciprocally mounted in a bore formed in said support member and having a first vertically disposed groove and a second circumferentially disposed groove formed thereon, a one-piece valve lifter guide comprising a vertically disposed first guide portion disposed in said first groove and a pair of arcuately shaped second guide portions extending horizontally from opposite edges of said first guide portion and disposed in said second groove, and anti-rotation means for preventing rotation of said valve lifter relative to said stationary support member.
Claim 3
Dependent Claim
35 words
The engine of claim 1 wherein said anti-rotation means further comprises a third guide portion, connected to an upper end of said first guide portion, seated in a bore formed in said stationary support member.
Claim 4
Dependent Claim
34 words
The engine of claim 1 further comprising passage means formed in said stationary support member and on said valve lifter for communicating lubricating oil to said second groove upon reciprocation of said valve lifter.
Claim 5
Dependent Claim
53 words
The engine of claim 1 wherein said valve lifter has a roller rotatably mounted on a lower end thereof and further comprising a cam shaft rotatably mounted in said stationary support member, said cam shaft having a cam lobe engaging said roller to reciprocate said valve lifter upon rotation of said cam shaft.
Claim 6
Dependent Claim
40 words
The engine of claim 1 wherein said first guide portion constitutes a single leg and said second guide portions constitute a pair of semicylindrical arms having their ends spaced apart to adapt them for radial insertion about said valve lifter.
Claim 7
Dependent Claim
29 words
The engine of claim 5 wherein said arms have a diameter which is slightly larger than the diameter of said bore when said arms are in their relaxed condition.
Claim 8
Dependent Claim
17 words
The engine of claim 5 wherein said second groove constitutes an annulus defined on said valve lifter.
Claim 9
Dependent Claim
44 words
The engine of claim 2 wherein said third guide portion constitutes a hook connected to the upper end of said first guide portion at a reverse bEnd to position said second guide portions and said hook on opposite sides of said first guide portion.
References Cited (Backward Citations)
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Cited
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Cited
US2846988A
Cited
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Cited
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Cited
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |