Patent US3239589A successfully refreshed from Google Patents.
US3239589A
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US
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Method of forming a low friction piston in a cylinder
Assignee: Individual
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Filing: 1961-10-18
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Granted: 1966-03-08
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Expires: 1981-10-18
Abstract
No abstract record available.
Inventors
- 👤 Charles S White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:55
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14754; F; F16; F16J; F16J1/00; F16J1/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/49677
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD FOR FORMING A PISTON IN SITU WITHIN A CYLINDER OF THE TYPE IN WHICH THE PISTON RECIPROCATES WITHIN THE CYLINDER AND THE CYLINDER DEFINES AN ENCLOSED CHAMBER ON AT LEAST ONE SIDE OF SAID PISTON AND HAS MEANS THEREON FOR INTRODUCING FLUID INTO SAID CHAMBER WHICH IS PRESSURIZED WHILE IN THE CHAMBER WHICH INCLUDES THE STEPS OF FILLING AN AXIAL PORTION OF THE BORE OF THE CYLINDER WITH A MATERIAL HAVING LOW FRICTION CHARACTERISTICS AT LEAST AT THE SURFACE THEREOF IN CONTACT WITH SAID BORE AND HARDENING SAID MATERIAL WHILE UNDER PRESSURE WHEREBY SAID MATERIAL IS FORMED INTO A PISTON IN SEALED SLIDABLE RELATIONSHIP WITH SAID CYLINDER.
Claim 2
Independent Claim
109 words
A METHOD FOR FORMING A PISTON IN SITU WITHIN A CYLINDER OF THE TYPE IN WHICH THE PISTON RECIPROCATES WITHIN THE CYLINDER AND THE CYLINDER DEFINES AN ENCLOSED CHAMBER ON AT LEAST ONE SIDE OF SAID PISTON AND HAS MEANS THEREON FOR INTRODUCING FLUID INTO SAID CHAMBER WHICH IS PRESSURIZED WHILE IN THE CHAMBER WHICH INCLUDES THE STEPS OF FILLING AN AXIAL PORTION OF THE BORE OF THE CYLINDER WITH A MATERIAL HAVING LOW FRICTION CHARACTERISTICS AT LEAST AT THE SURFACE THEREOF IN CONTACT WITH SAID BORE AND HARDENING SAID MATERIAL WHILE UNDER PRESSURE WHEREBY SAID MATERIAL IS FORMED INTO A PISTON IN SEALED SLIDABLE RELATIONSHIP WITH SAID CYLINDER.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |