US4080233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a self-lubricating bearing
Assignee: MADELEINE AS SCIL AGENT LLC
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Filing: 1976-04-29
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Granted: 1978-03-21
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Expires: 1996-04-29
Abstract
Abstract Method of making a spherical bearing includes a bearing liner having a low-friction layer containing a resin matrix which includes therein a dispersion of self-lubricating particles. The particles include powdered or flock polytetrafluoroethylene particles and grahite fibers.
Inventors
- 👤 Albert R. McCloskey
- 👤 Gordon T. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; B; B29; B29C; B29C70/00; B29C70/04; F16C11/00; F16C11/04; F16C11/06; F16C11/0614; B29K; B29K2307/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T428/00; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
184 words
A method of making a bearing having a low-friction bearing surface, which comprises: mixing fluorocarbon particles and graphite fibers at a ratio by weight of at least five to one and not greater than fifty to one with about an equal amount by weight of an adhesive thermosetting resin to be randomly dispersed therein, said graphite fibers being high modulus fibers with a non-circular cross-section to have a maximum width of about 14.0 microns and a length substantially greater than said maximum width, applying said mixture of particles, loose fibers, and resin to a backing material in a layer thereon to cause said fibers and particles to lie in a general random dispersion arrangement therein, applying heat to cause said mixture to cure while it is on said backing material to form a flexible sheeting having a low-friction bearing surface, forming said sheet into a bearing liner against the structure of said bearing, said backing material nearest the structure and with said surface facing outwardly of said backing material away from said structure, and securing said liner to said structure to provide said bearing.
Claim 2
Independent Claim
184 words
A method of making a bearing having a low-friction bearing surface, which comprises: mixing fluorocarbon particles and graphite fibers at a ratio by weight of at least five to one and not greater than fifty to one with about an equal amount by weight of an adhesive thermosetting resin to be randomly dispersed therein, said graphite fibers being high modulus fibers with a non-circular cross-section to have a maximum width of about 14.0 microns and a length substantially greater than said maximum width, applying said mixture of particles, loose fibers, and resin to a backing material in a layer thereon to cause said fibers and particles to lie in a general random dispersion arrangement therein, applying heat to cause said mixture to cure while it is on said backing material to form a flexible sheeting having a low-friction bearing surface, forming said sheet into a bearing liner against the structure of said bearing, said backing material nearest the structure and with said surface facing outwardly of said backing material away from said structure, and securing said liner to said structure to provide said bearing.
Claim 3
Dependent Claim
30 words
A method as set forth in claim 1, wherein said mixing includes by weight about 531/2 part of polytetrafluoroethylene particles, 11/2 parts of graphite fibers and 45 parts of resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |