US3755164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing composition
Assignee: Boeing Co
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Filing: 1972-04-24
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Granted: 1973-08-28
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Expires: 1992-04-24
Abstract
Abstract A self-lubricating solid bearing having oxidation resistant lubricants of aluminum phosphate, barium fluoride and calcium fluoride, dispersed throughout a matrix of silver containing an additive selected from aluminum oxide, silicon nitride or molybdenum silicide to give a bearing operable at elevated temperatures.
Inventors
- 👤 Wyk J Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:15
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A self-lubricating solid bearing material for use above 750*F comprising: a combination of oxidation resistant aluminum phosphate, barium fluoride and calcium fluoride in weight percent relation to each other of about 6 percent aluminum phosphate, about 48.4 percent barium fluoride and about 45.6 percent calcium fluoride, silver in the ratio of about 1:4 to 1:10 parts by weight of oxidation resistant materials to silver; and a compound selected from the group of materials consisting of aluminum oxide, silicon nitride, and molybdenum silicide in an amount of from about 5 to 10 weight percent of total composition.
Claim 2
Dependent Claim
15 words
A self-lubricating solid bearing material as in claim 2, wherein the compound is aluminum oxide.
Claim 3
Dependent Claim
98 words
A self-lubricating solid bearing material for use at temperatures above 750*F comprising: a combination of oxidation resistant aluminum phosphate, barium fluoride and calcium fluoride in weight relation to each other of about 6 percent aluminum phosphate, about 48.4 percent barium fluoride and about 45.6 percent calcium fluoride; silver in the ratio of about 1:6 to 1:7 parts by weight of oxidation resistant materials to silver and a compound selected from the group of materials consisting of aluminum oxide, silicon nitride, and molybdenum silicide in the amount of from about 5 to 9 weight percent of the total composition.
Claim 4
Dependent Claim
48 words
A self-lubricating solid bearing material for use at higH temperatures comprising: about 0.8 percent aluminum phosphate, about 6.6 percent barium fluoride, about 6.2 percent calcium fluoride, and about 5.0 percent aluminum oxide with these compounds dispersed throughout a silver matrix comprising about 81.4 percent of the bearing material.
References Cited (Backward Citations)
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |