US3262435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic variable valve timing device for internal combustion engines
Assignee: Individual
•
Filing: 1964-05-25
•
Granted: 1966-07-26
•
Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 John R Cribbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/34; F01L1/344; F01L1/34409; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1956; Y10T74/19949; Y10T74/19963; Y10T74/19967
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
IN AN INTERNAL COMBUSTION ENGINE: A CAMSHAFT AND A CRANKSHAFT; AUTOMATIC VALVE TIMING APPARATUS, COMPRISING; A RESILIENT DRIVE COUPLING EFFECTIVELY BETWEEN CRANKSHAFT AND SAID CAMSHAFT BIASING THE CAMSHAFT INTO A LAG POSITION RELATIVE TO THE CRANKSHAFT AND RETARDING VALVE TIMING AS SAID CRANKSHAFT IS ACCELERATED OND OPERATED AT INCREASED R.P.M.
Claim 2
Dependent Claim
50 words
IN AN INTERNAL COMBUSTION ENGINE: A CAMSHAFT AND A CRANKSHAFT; AUTOMATIC VALVE TIMING APPARATUS, COMPRISING; A RESILIENT DRIVE COUPLING EFFECTIVELY BETWEEN CRANKSHAFT AND SAID CAMSHAFT BIASING THE CAMSHAFT INTO A LAG POSITION RELATIVE TO THE CRANKSHAFT AND RETARDING VALVE TIMING AS SAID CRANKSHAFT IS ACCELERATED OND OPERATED AT INCREASED R.P.M.
References Cited (Backward Citations)
US2665569A
Cited
US2829507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |