Patent US3572299A successfully refreshed from Google Patents.
US3572299A
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US
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Valve-actuating train for machinery having a cyclicly operated poppet valve
Assignee: Lester Industries Inc
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Filing: 1969-12-15
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Granted: 1971-03-23
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Expires: 1989-12-15
Abstract
Abstract AN ENGINE, ESPECIALLY OF THE INTERNAL-COMBUSTION VALVEIN-HEAD TYPE, WHEREIN A VALVE CONTROLLING CAM AND A CAM FOLLOWER OF A VALVE TRAIN ACT POSITIVELY ON THE VALVE TO HOLD IT CLOSED AGAINST A SEAT FACING INWARDLY OF THE COMBUSTION CHAMBER EXCEPT WHEN THE CAM ROTATES THROUGH A MINOR PORTION OF EACH REVOLUTION TO RELEASE THE REMAINDER OF THE VALVE TRAIN FOR VALVE OPENING WHEREUPON A SPRING OR OTHER RESILIENT MEANS FORCES THE VALVE OPEN.
Inventors
- 👤 Thomas J Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/30; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |