US3345976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poppet valves for internal combustion engines
Assignee: Mirrlees National Ltd
•
Filing: 1965-06-15
•
Granted: 1967-10-10
•
Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Pope Joseph Albert
- 👤 Krzyzewski Stefan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:40
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/08; F01L3/085; F01M; F01M9/00; F01M9/10; F01M9/103
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A POPPET VALVE ASSEMBLY COMPRISING A CAGE, A VALVE GUIDE MOUNTED IN SAID CAGE, A VALVE STEM MOVABLE AXIALLY IN SAID GUIDE, AT LEAST TWO SEPARATE LONGITUDINAL FLATS IN SAID VALVE STEM, AN INLET FOR PRESSURIZED LUBRICANT IN SAID GUIDE COMMUNICATING WITH ONE OF SAID FLATS, ON OUTLET FOR LUBRICANT IN SAID GUIDE LOCATED FOR SIMULTANEOUS COMMUNICATION WITH ANOTHER OF SAID FLATS, AN ANNULAR GROOVE IN SAID GUIDE SPACED FROM THE ENDS OF SAID FLATS WHEN SAID VALVE IS CLOSED BUT COMMUNICATING THEREWITH WHEN SAID VALVE IS OPEN, SAID INLET AND OUTLET BEING WITHIN THE LENGTH OF SAID FLATS IN ALL POSITIONS OF SAID VALVE.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |