US3915129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1974-09-18
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Granted: 1975-10-28
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Expires: 1994-09-18
Abstract
Abstract In an internal combustion engine of the type having a timing cam with a distance from center to cam surface with varies along its axis of rotation and at least one cam follower which rides on the cam surface to operate a valve so that the valve operating characteristics vary as a function of the position of the cam follower along the axis of rotation of the cam, the improvement wherein the cam follower includes a ball having a flat surface engaging the cam surface so that a line of contact always exists between the ball and the cam surface and means for mounting said ball in the follower, producing a mechanism which is durable, cheap to manufacture and adaptable to present day engines.
Inventors
- 👤 Robert H Rust
- 👤 Leonard Owen Fulghum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/0015; F01L13/0036; F01L13/0042; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
In an internal combustion engine of the type having a timing cam with a distance from center to cam surface which varies Along its axis of rotation and at least one cam follower which rides on said cam surface to operate a valve so that the valve operating characteristics vary as a function of the position of the cam follower along the axis of rotation of the cam, the improvement wherein the cam follower includes a ball having a flat surface engaging the cam surface so that a line of contact always exists between the ball and the cam surface and means for mounting said ball in said follower.
Claim 2
Dependent Claim
109 words
In an internal combustion engine of the type having a timing cam with a distance from center to cam surface which varies Along its axis of rotation and at least one cam follower which rides on said cam surface to operate a valve so that the valve operating characteristics vary as a function of the position of the cam follower along the axis of rotation of the cam, the improvement wherein the cam follower includes a ball having a flat surface engaging the cam surface so that a line of contact always exists between the ball and the cam surface and means for mounting said ball in said follower.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |