US3073292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite valve lifter
Assignee: Motors Liquidation Co
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Filing: 1960-02-17
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Granted: 1963-01-15
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Expires: 1980-02-17
Abstract
No abstract record available.
Inventors
- 👤 Robert C Behnke
- 👤 Charles H Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:55
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
IN AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER BLOCK, THE COMBINATION OF CARBURIZED STEEL CAMSHAFT JOURNALED IN SAID BLOCK AND A HYDRAULIC VALVE LIFTER COMPRISING A GENERALLY CYLINDRICAL STEEL SLEEVE AND A FOOT PIECE SECURED TO THE END OF SAID SLEEVE ADJACENT SAID CAMSHAFT, SAID FOOT PIECE BEING IN ENGAGEMENT WITH A CAM PORTION OF SAID CAMSHAFT AND BEING FORMED OF AN ALLOY CAST IRON HAVING AN IRON-CHROMIUM-MOLYBDENUM CARBIDE CONTENT OF AT LEAST 35% AT THE EUTECTIC TEMPERATURE AND AT LEAST 43% AT THE EUTECTOID TEMPERATURE, SAID ALLOY IRON CONSISTING ESSENTIALLY OF ABOUT 3.2% TO 3.4% CARBON, 1% TO 1.4% SILICON, 0.7% TO 0.9% MANGANESE, 2.4% TO 2.6% CHROMIUMM, 0.4% TO 0.7% NICKEL, 0.4% TO 0.7% MOLYBDENUM, PHOSPHORUS NOT IN EXCESS OF ABOUT 0.3%, SULPHUR
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |