US4071643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing bearing material
Assignee: Federal Mogul Engineering Ltd
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Filing: 1975-11-20
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Granted: 1978-01-31
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Expires: 1995-11-20
Abstract
Abstract This invention is the production of a plain bearing having an aluminum interlayer and a metal overlay on the interlayer. The overlayer is for example cast on the interlayer so that it can constitute substantially the final bearing surface without machining after casting or roll-bonding. In order to enable the overlay to be cast on, the interlayer is abraded while below the surface of a tinning or other coating material in a material so that oxides can be removed from the aluminium surface and the coating applied to it without its becoming re-oxidised, and then the overlay can be applied to the coating.
Inventors
- 👤 George Christopher Pratt
- 👤 Barry John Eastwood
- 👤 Anthony Dennis Michael
- 👤 Leonard Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:53
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/14; C; C23; C23C; C23C2/00; C23C2/04; C23C2/06; C23C2/10; F16C2223/00; F16C2223/30; F16C2223/40; F16C2223/44; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/49677; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12687; Y10T428/12701; Y10T428/12736; Y10T428/1275; Y10T428/12757
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A method of manufacturing a plain bearing, which comprises bonding an aluminum or aluminum alloy interlayer to a continuous steel backing strip; passing the resulting composite strip below the surface of a bath of molten lead/tin alloy coating material; holding the composite strip under the surface of the bath of coating material until its temperature is substantially equal to that of the bath of coating material; removing oxide from the surface of the interlayer, during its stay in the bath, and coating the resulting cleaned surface with said coating material; withdrawing the coated composite strip from the bath over means retaining the strip straight across its width; casting a lead/tin alloy overlay onto the coated surface of the interlayer; and forming the coated composite strip material with its overlay into a semi-cylindrical bearing shell without removing metal in a machining operation.
Claim 2
Independent Claim
141 words
A method of manufacturing a plain bearing, which comprises bonding an aluminum or aluminum alloy interlayer to a continuous steel backing strip; passing the resulting composite strip below the surface of a bath of molten lead/tin alloy coating material; holding the composite strip under the surface of the bath of coating material until its temperature is substantially equal to that of the bath of coating material; removing oxide from the surface of the interlayer, during its stay in the bath, and coating the resulting cleaned surface with said coating material; withdrawing the coated composite strip from the bath over means retaining the strip straight across its width; casting a lead/tin alloy overlay onto the coated surface of the interlayer; and forming the coated composite strip material with its overlay into a semi-cylindrical bearing shell without removing metal in a machining operation.
Claim 3
Dependent Claim
27 words
A method as claimed in claim 1 in which the oxide is removed by a brush which is moved under the surface of the molten coating material.
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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |