US4439484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer bearing with coating of tetrafluoroethylene-perfluoroalkylvinyl either copolymer resin and polytetrafluoroethylene resin
Assignee: Daido Metal Co Ltd
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Filing: 1982-08-03
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Granted: 1984-03-27
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Expires: 2002-08-03
Abstract
Abstract A multi-layer bearing including a metal backing layer and a porous material layer lined with the metal backing layer and impregnated in its interior and coated on its surface with a composition to increase the anti-cavitation, wear resistance and low friction characteristics of the multi-layer bearing. The composition contains, by volume, 0.1-50% tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin and the balance essentially polytetrafluoroethylene.
Inventors
- 👤 Sanae Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:32
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/909; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
49 words
A multi-layer bearing comprising: a metal backing layer; and a porous material layer lined with said metal backing layer, said porous material layer being impregnated in its interior, and coated on its surface with a composition containing, by volume, 0.1-50% tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin and the balance essentially polytetrafluoroethylene.
Claim 2
Dependent Claim
49 words
A multi-layer bearing comprising: a metal backing layer; and a porous material layer lined with said metal backing layer, said porous material layer being impregnated in its interior, and coated on its surface with a composition containing, by volume, 0.1-50% tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin and the balance essentially polytetrafluoroethylene.
Claim 3
Dependent Claim
24 words
A multi-layer bearing as claimed in claim 1, wherein said composition contains, by volume, 5-40% tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin and the balance essentially polytetrafluoroethylene.
References Cited (Backward Citations)
US4128693A
Cited
US4208472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |