US3926818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite bearing materials
Assignee: BorgWarner Automotive Transmission and Engine Component Corp
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Filing: 1974-12-16
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Granted: 1975-12-16
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Expires: 1994-12-16
Abstract
Abstract Composite bearing structures are prepared by preparing a preform composite having a core or center comprising glass fiber filled resin and at least one surface comprising milled fiber glass and graphite filled resin. When formed and cured into bearings and thrust washers, the composite exhibits improved impact resistance and low wear.
Inventors
- 👤 Clarence E Albertson
- 👤 Robert H Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
35 words
A PRE-FORM COMPOSITE USEFUL FOR MAKING BEARING STRUCTURES CONSISTING OF A CORE OR CENTER COMPRISING A FIBER GLASS FILLED RESIN AND AT LEAST ONE OUTER SURFACE COMPRISING MILLED FIBER GLASS AND SOLID LUBRICANT FILLED RESIN.
Claim 2
Dependent Claim
35 words
A PRE-FORM COMPOSITE USEFUL FOR MAKING BEARING STRUCTURES CONSISTING OF A CORE OR CENTER COMPRISING A FIBER GLASS FILLED RESIN AND AT LEAST ONE OUTER SURFACE COMPRISING MILLED FIBER GLASS AND SOLID LUBRICANT FILLED RESIN.
Claim 3
Dependent Claim
46 words
THE PRE-FORM COMPOSITE OF CLAIM 1 WHEREIN THE CORE IS COMPRISED OF A PHENOLIC RESIN AND GLASS FIBER, AND THE OUTER SURFACE IS COMPRISED OF A PHENOLIC RESIN AND MILLED GLASS FIBER AND SOLID LUBRICANT SELECTED FROM THE GROUP GRAPHITE, POLY(TETRAFLUOROETHYLENE), MOLYBDENUM DISULFIDE, AND MIXTURES THEREOFF.
Claim 4
Dependent Claim
74 words
A pre-form composite suitable for use in bearing and thrust washer applications having improved impact and wear properties consisting of a core or center comprising from 60 to 40% by weight phenolic resin and correspondingly from 40 to 60% by weight glass fiber, and at least one outer surface comprising from 40 to 75% by weight phenolic resin, from 45 to 20% by weight milled glass fiber and 15 to 5% by weight graphite.
Claim 5
Dependent Claim
74 words
A pre-form composite suitable for use in bearing and thrust washer applications having improved impact and wear properties consisting of a core or center comprising from 60 to 40% by weight phenolic resin and correspondingly from 40 to 60% by weight glass fiber, and at least one outer surface comprising from 40 to 75% by weight phenolic resin, from 45 to 20% by weight milled glass fiber and 15 to 5% by weight graphite.
Claim 6
Dependent Claim
38 words
The pre-form composite of claim 3 wherein the core or center comprises from about 90 to about 50% by weight of the total composite, and the outer surface comprising correspondingly from 10 to 50% of the total composite.
Claim 7
Dependent Claim
13 words
The pre-form composite of claim 4 in the form of a thrust washer.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |