Patent US4098515A successfully refreshed from Google Patents.
US4098515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resisting material and use of the same
Assignee: Riken Piston Ring Industrial Co Ltd
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Filing: 1976-11-05
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Granted: 1978-07-04
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Expires: 1996-11-05
Abstract
Abstract In a sliding mechanism including a first sliding surface, a sliding member having a second sliding surface which contacts with the first sliding surface and slides relatively to the first sliding surface, and a holding member holding the sliding member in contact, while moved, at least a contact portion of the seal member with the holding member is made of polytetrafluoroethylene resin containing iron alloy powder.
Inventors
- 👤 Tatsuei Sakata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:59
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3496; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A sliding mechanism including a first sliding surface, a sliding member having a second sliding surface which contacts with said first sliding surface and slides relatively to said first sliding surface, and a holding member being made of aluminum alloy or aluminum and holding said sliding member in contact, while moved, in which at least a contact portion of said sliding member with said holding member is made of polytetrafluoroethylene resin containing 50 to 65% by weight of cast iron powder having a grain size of 100 to 400 mesh, or 45 to 75% by weight of chromium-molybdenum steel powder having a grain size of 150 to 325 mesh.
Claim 2
Dependent Claim
109 words
A sliding mechanism including a first sliding surface, a sliding member having a second sliding surface which contacts with said first sliding surface and slides relatively to said first sliding surface, and a holding member being made of aluminum alloy or aluminum and holding said sliding member in contact, while moved, in which at least a contact portion of said sliding member with said holding member is made of polytetrafluoroethylene resin containing 50 to 65% by weight of cast iron powder having a grain size of 100 to 400 mesh, or 45 to 75% by weight of chromium-molybdenum steel powder having a grain size of 150 to 325 mesh.
Claim 3
Dependent Claim
24 words
A sliding mechanism according to claim 1 in which said cast iron powder or said chromium-molybdenum steel powder is dispersed in said polytetrafluoroethylene resin.
Claim 4
Dependent Claim
15 words
A sliding mechanism according to claim 1 in which said chromium-molybdenum steel powder is sulfurized.
Claim 5
Dependent Claim
15 words
A sliding mechanism according to claim 1 in which said chromium-molybdenum steel powder is nitrided.
Claim 6
Dependent Claim
18 words
A sliding mechanism according to claim 1 in which said sliding member is used as a seal ring.
Claim 7
Dependent Claim
64 words
A sliding mechanism according to claim 1 in which a contact portion of said sliding member with said first sliding surface is made of polytetrafluoroethylene resin containing 50 to 65% by weight of cast iron powder having a grain size of 100 to 400 mesh, or 45 to 75% by weight of chromium-molybdenum steel powder having a grain size of 150 to 325 mesh.
References Cited (Backward Citations)
GB575620A
Cited
US2879247A
Cited
US3177998A
Cited
US3300225A
Cited
GB1224735A
Cited
FR1603013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |