US3147747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves for internal combustion engines
Assignee: Engineering Dev Corp
•
Filing: 1963-06-24
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Granted: 1964-09-08
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Le Roy O Kittelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/02; F01L3/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING AN INITIAL VALVE BODY INCLUDING A REGULAR STEM SECTION, A CONTINUOUS UNDERSIZE BELL SECTION AND A SUBSTANTIALLY FULL DIAMETER THINNER HEAD SECTION MADE OF A METAL HAVING HIGH STRENGTH AND DUCTILITY SUCH AS A STEEL ALLOY, AND A COLLAR OF SUBSTANTIAL THICKNESS FORMED CONTINUOUSLY AROUND BELL AND HEAD SECTIONS OF THE INITIAL VALVE BODY FROM THE OUTER PERIPHERY OF THE HEAD SECTION TO AND BEYOND THE JUNCTURE OF THE STEM AND BELL SECTIONS MADE OF A METAL ALLOY HAVING GREATER ANTI-CORROSIVE, ANTIEROSIVE AND ANTI-IMPACT SHOCK RESISTANCE PROPERTIES SUCH AS COBALT AND CHROMINUM ALLOY.
Claim 2
Dependent Claim
102 words
A POPPET VALVE FOR AN INTERNAL COMBUSTION ENGINE COMPRISING AN INITIAL VALVE BODY INCLUDING A REGULAR STEM SECTION, A CONTINUOUS UNDERSIZE BELL SECTION AND A SUBSTANTIALLY FULL DIAMETER THINNER HEAD SECTION MADE OF A METAL HAVING HIGH STRENGTH AND DUCTILITY SUCH AS A STEEL ALLOY, AND A COLLAR OF SUBSTANTIAL THICKNESS FORMED CONTINUOUSLY AROUND BELL AND HEAD SECTIONS OF THE INITIAL VALVE BODY FROM THE OUTER PERIPHERY OF THE HEAD SECTION TO AND BEYOND THE JUNCTURE OF THE STEM AND BELL SECTIONS MADE OF A METAL ALLOY HAVING GREATER ANTI-CORROSIVE, ANTIEROSIVE AND ANTI-IMPACT SHOCK RESISTANCE PROPERTIES SUCH AS COBALT AND CHROMINUM ALLOY.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |