Patent US3131978A successfully refreshed from Google Patents.
US3131978A
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Elements having low friction pressure engagement and method of construction
Assignee: Individual
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Filing: 1961-10-23
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Granted: 1964-05-05
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Charles S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:45
CPC Classifications
F; F16; F16C; F16C11/00; F16C11/04; F16C11/06; F16C11/0619; F16C11/0623; F16C11/0628; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14754; Y; Y10; Y10S; Y10S74/00; Y10S74/10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49648; Y10T29/49657; Y10T29/49661; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19721
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A CYLINDRICAL BUSHING MADE OF A FABRIC MATERIAL HAVING LOW FRICTION FIBERS ON THE INNER SURFACE THEREOF, A RELATIVELY THIN HARDENED BARRIER LAYER OF IMPERVIOUS RESIN MATERIAL SECURED TO AND COVERING THE OUTER SURFACE OF SAID FABRIC MATERIAL, AND A HARDENED RESIN BUSHING MATERIAL ENCIRCLING AND SECURED TO SAID IMPERVIOUS BARRIER LAYER, THE END PORTIONS OF SAID FABRIC MATERIAL AND THE RESIN BUSHING MATERIAL BACKING THE END PORTIONS BEING FLARED OUTWARDLY TO PROVIDE A LOW FRICTION SURFACE FOR GUIDING A SHAFT INTO THE BUSHING WITH SUBSTANTIALLY NO FREE FIBER ENDS EXTENDING INWARDLY OF THE WALL AT THE ENDS OF THE BUSHING APERTURE.
Claim 2
Dependent Claim
102 words
A CYLINDRICAL BUSHING MADE OF A FABRIC MATERIAL HAVING LOW FRICTION FIBERS ON THE INNER SURFACE THEREOF, A RELATIVELY THIN HARDENED BARRIER LAYER OF IMPERVIOUS RESIN MATERIAL SECURED TO AND COVERING THE OUTER SURFACE OF SAID FABRIC MATERIAL, AND A HARDENED RESIN BUSHING MATERIAL ENCIRCLING AND SECURED TO SAID IMPERVIOUS BARRIER LAYER, THE END PORTIONS OF SAID FABRIC MATERIAL AND THE RESIN BUSHING MATERIAL BACKING THE END PORTIONS BEING FLARED OUTWARDLY TO PROVIDE A LOW FRICTION SURFACE FOR GUIDING A SHAFT INTO THE BUSHING WITH SUBSTANTIALLY NO FREE FIBER ENDS EXTENDING INWARDLY OF THE WALL AT THE ENDS OF THE BUSHING APERTURE.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |