Patent US4031777A successfully refreshed from Google Patents.
US4031777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low stress cam roller
Assignee: Caterpillar Inc
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Filing: 1976-02-11
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Granted: 1977-06-28
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Expires: 1996-02-11
Abstract
Abstract A cam follower in the form of a roller has a annular groove of arcuate cross-section in its opposite sides in order to minimize contact stress.
Inventors
- 👤 John H. Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/06; F01; F01L; F01L2305/00; F01L2305/02; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
In a cam follower mechanism, a rotary cam having a straight follower lifting cam surface, a reciprocally guided follower, a follower roller rotatably supported by said follower for engagement with same cam surface, said roller being a generally cylindrical member having a peripheral contact surface and a pair of opposite, radially directed sidewalls, wherein the improvement comprises means on said roller for relieving stress, said means on said roller comprising an annular groove in each of said radially directed sidewalls, said annular groove being arcuate in cross-section.
Claim 2
Dependent Claim
87 words
In a cam follower mechanism, a rotary cam having a straight follower lifting cam surface, a reciprocally guided follower, a follower roller rotatably supported by said follower for engagement with same cam surface, said roller being a generally cylindrical member having a peripheral contact surface and a pair of opposite, radially directed sidewalls, wherein the improvement comprises means on said roller for relieving stress, said means on said roller comprising an annular groove in each of said radially directed sidewalls, said annular groove being arcuate in cross-section.
Claim 3
Dependent Claim
30 words
The invention of claim 1 wherein said roller defines a longitudinal axis, an axially directed bore through said roller, said sidewalls being defined by said bore and said contact surface.
Claim 4
Dependent Claim
26 words
The invention of claim 2 further including a shaft extending through said bore through said roller, and wherein said roller is rotatably journaled on said shaft.
Claim 5
Dependent Claim
44 words
The invention of claim 3 wherein said annular grooves are entirely curved and free from straight portions and arcuate throughout the entire cross-section thereof, and wherein said annular grooves are centered intermediate said bore and said contact surface so as to be equidistant therebetween.
References Cited (Backward Citations)
US2947196A
Cited
US3831457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |