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US3372941A
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US
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Valve seal
Assignee: ILLINOIS MILLING Inc
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Filing: 1965-01-26
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Granted: 1968-03-12
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Liebig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:01
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/08; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/934; Y10S277/935; Y10S277/944; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
IN A VALVE SEAL AND VALVE STEM ASSEMBLY FOR USE IN AN INTERNAL COMBUSTION ENGINE, THE PROVISION OF A CUPSHAPED BODY OF SEMI-RIGID SYNTHETIC PLASTIC RESINOUS MATERIAL CAPABLE OF MAINTAINING ITS FORM AND SHAPE UP TO ABOUT 300* F. AND HAVING AN INWARDLY DIRECTED PORTION DEFINING AN AXIAL APERTURE THERETHROUGH LARGER THAN THE DIAMETER OF THE VALVE STEM LEAVING A SPACE THEREBETWEEN, AND A RELATIVELY NON-RIGID INSERT OF ELASTOMERIC MATERIAL DISPOSED WITHIN THE APERTURE AND SUBSTANTIALLY COEXTENSIVE WITH THE AXIAL EXTENT OF THE INWARDLY DIRECTED PORTION OF THE CUP-SHAPED BODY AND INTERLOCKED THEREWITH AND SUBSTANTIALLY FILLING THE SPACE BETWEEN THE INWARDLY DIRECTED PORTION OF THE BODY AND THE VALVE STEM, SAID ELASTOMERIC MATERIAL HAVING THE PROPERTIES OF WITHSTANDING UP TO ABOUT 500* F. AND SWELLING IN THE PRESENCE OF HOT OIL WHEREBY THE ASSEMBLED BODY AND INSERT IS SLIDABLY ASSEMBLED WITH THE VALVE STEM WHEN INITIALLY POSITIONED THEREON AND WHEREIN SUBSEQUENT HEAT SWELLING OF THE INSERT IN USE FIXEDLY GRIPS THE VALVE STEM FOR MOVEMENT OF THE VALVE SEAT IN UNISON THEREWITH AND WITH THE INWARDLY DIRECTED PORTION OF THE CUP-SHAPED BODY SERVING TO BACK UP THE INSERT AGAINST OUTWARD RADIAL ENLARGEMENT.
Claim 2
Dependent Claim
192 words
IN A VALVE SEAL AND VALVE STEM ASSEMBLY FOR USE IN AN INTERNAL COMBUSTION ENGINE, THE PROVISION OF A CUPSHAPED BODY OF SEMI-RIGID SYNTHETIC PLASTIC RESINOUS MATERIAL CAPABLE OF MAINTAINING ITS FORM AND SHAPE UP TO ABOUT 300* F. AND HAVING AN INWARDLY DIRECTED PORTION DEFINING AN AXIAL APERTURE THERETHROUGH LARGER THAN THE DIAMETER OF THE VALVE STEM LEAVING A SPACE THEREBETWEEN, AND A RELATIVELY NON-RIGID INSERT OF ELASTOMERIC MATERIAL DISPOSED WITHIN THE APERTURE AND SUBSTANTIALLY COEXTENSIVE WITH THE AXIAL EXTENT OF THE INWARDLY DIRECTED PORTION OF THE CUP-SHAPED BODY AND INTERLOCKED THEREWITH AND SUBSTANTIALLY FILLING THE SPACE BETWEEN THE INWARDLY DIRECTED PORTION OF THE BODY AND THE VALVE STEM, SAID ELASTOMERIC MATERIAL HAVING THE PROPERTIES OF WITHSTANDING UP TO ABOUT 500* F. AND SWELLING IN THE PRESENCE OF HOT OIL WHEREBY THE ASSEMBLED BODY AND INSERT IS SLIDABLY ASSEMBLED WITH THE VALVE STEM WHEN INITIALLY POSITIONED THEREON AND WHEREIN SUBSEQUENT HEAT SWELLING OF THE INSERT IN USE FIXEDLY GRIPS THE VALVE STEM FOR MOVEMENT OF THE VALVE SEAT IN UNISON THEREWITH AND WITH THE INWARDLY DIRECTED PORTION OF THE CUP-SHAPED BODY SERVING TO BACK UP THE INSERT AGAINST OUTWARD RADIAL ENLARGEMENT.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |