US4086376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphenylene sulphide applications
Assignee: Federal Mogul Engineering Ltd
•
Filing: 1975-08-25
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Granted: 1978-04-25
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Expires: 1995-08-25
Abstract
Abstract A method of applying a bearing lining at least 0.005 inch thick of polyarylene sulphide to a bearing backing, which comprises applying to said backing a powder composition consisting of at least 80% by weight of uncured polyarylene sulphide together with at least 10% by weight of precured polyarylene sulphide, said precured polyarylene sulphide having been cured by being heated in air for 2 hours at at least 400° C and is in the form of particles with sizes in the range 53-211 microns, and then heating and curing the uncured polyarylene sulphide of the coating by heating to a temperature of at least 380° C. To produce the cured powder, uncured powder is mixed with salt and then cured; the salt prevents the powder from coalescing, and is subsequently dissolved out.
Inventors
- 👤 Glyndwr John Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533; Y10T428/31678
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A method of applying a bearing lining at least 0.005 inch thick of polyarylene sulphide to a bearing backing, which comprises applying to said backing a powder composition consisting of at least 80% by weight of uncured polyarylene sulphide together with at least 10% by weight of precured polyarylene sulphide, said precured polyarylene sulphide having been cured by being heated in air for 2 hours at at least 400° C and is in the form of particles with sizes in the range 53-211 microns, and then heating and curing the uncured polyarylene sulphide of the coating by heating to a temperature of at least 380° C.
Claim 2
Independent Claim
106 words
A method of applying a bearing lining at least 0.005 inch thick of polyarylene sulphide to a bearing backing, which comprises applying to said backing a powder composition consisting of at least 80% by weight of uncured polyarylene sulphide together with at least 10% by weight of precured polyarylene sulphide, said precured polyarylene sulphide having been cured by being heated in air for 2 hours at at least 400° C and is in the form of particles with sizes in the range 53-211 microns, and then heating and curing the uncured polyarylene sulphide of the coating by heating to a temperature of at least 380° C.
Claim 3
Dependent Claim
15 words
A method as claimed in claim 1 in which the polyarylene sulphide is polyphenylene sulphide.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1 in which the backing is coated in a fluidized bed.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 3 in which the backing is preheated to a temperature greater than 380° C before being coated.
Claim 6
Dependent Claim
30 words
A method as claim in claim 1 in which after coating with the powder, the backing is retained at a temperature of at least 380° C for about 2 hours.
Claim 7
Dependent Claim
20 words
A method as claimed in claim 1 in which the cured bearing lining is at least 0.010 inches in thickness.
Claim 8
Dependent Claim
21 words
A method as claim in claim 1 in which the backing is of aluminium or of steel with an aluminium covering.
Claim 9
Dependent Claim
54 words
A method as claimed in claim 1 in which the cured polyarylene sulphide powder is obtained by mixing uncured powder with a salt like substance and heated to a temperature in excess of 380° C after which the brittle mass so obtained is ground to powder and washed to remove the salt like substance.
References Cited (Backward Citations)
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Cited
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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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |