US4367189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing
Assignee: ASSOCIATED ENGINEEING CAWSTON HOUSE CAWSTON RUGBY WARWICKSHIRE CV22 7SA PLC
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Filing: 1979-03-12
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Granted: 1983-01-04
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Expires: 1999-03-12
Abstract
Abstract This invention is a bearing tube for a marine propeller shaft, and a method of making such a tube according to which polyacrylonitrile or other fibres (8) carrying a sticky resin (7) are wound onto a mandrel (5) and, at least at the bearing lining, wear resistant powder (6) or other compound is included with the fibres and resin to improve the properties of the bearing lining. Such a bearing tube including essentially a resin impregnated polyacrylonitrile fibres and the wear resistant compound can be easily machined to size without any health hazards, and can be lubricated by oil or water (even sea water) and is dimensionally stable.
Inventors
- 👤 Glyndwr J. Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:11
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C53/62; B29C53/66; B29C53/80; B29C53/8008; B29C53/8066; B29C70/00; B29C70/02; B29C70/021; B29C70/025; F; F16; F16C; F16C3/00; F16C3/02; F16C3/026; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; B29K; B29K2233/00; B29K2233/18; B29K2233/20; B29K2995/00; B29K2995/0037; B29K2995/0087; B29L; B29L2031/00; B29L2031/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A method of forming a bearing tube from a plurality of polyacrylonitrile fibres, a sticky resin, and a wear resistant compound and using a forming mandrel, which comprises: treating said plurality of fibres with said sticky resin; winding said plurality of resin-treated fibres onto said mandrel so as to form an inner and an outer surface of said bearing tube; applying said wear resistant compound to said fibres immediately subsequent to said step of winding said fibres; and solidifying said sticky resin.
Claim 2
Independent Claim
82 words
A method of forming a bearing tube from a plurality of polyacrylonitrile fibres, a sticky resin, and a wear resistant compound and using a forming mandrel, which comprises: treating said plurality of fibres with said sticky resin; winding said plurality of resin-treated fibres onto said mandrel so as to form an inner and an outer surface of said bearing tube; applying said wear resistant compound to said fibres immediately subsequent to said step of winding said fibres; and solidifying said sticky resin.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein said resin is selected from the group consisting of epoxide, phenolic, polyester, vinyl ester, and cresylic resin.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 2, further including a bath containing said sticky resin wherein said treating step further comprises passing said plurality of fibres through said bath.
Claim 5
Dependent Claim
36 words
A method as claimed in claim 3, wherein said applying step further comprises applying said wear resistant compound to the surface of said plurality of resin-treated fibres immediately after said step of winding onto said mandrel.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 1, wherein said wear resistant compound further comprises a powder.
Claim 7
Dependent Claim
25 words
A method as claimed in claim 5, wherein said wear resistant compound is selected from the group consisting of PTFE, graphite, bronze and mixtures thereof.
Claim 8
Dependent Claim
24 words
A method as claimed in claim 6, wherein said wear resistant compound comprises 50%-70% PTFE, 10%-30% graphite, and 10%-30% of bronze all by volume.
Claim 9
Dependent Claim
24 words
A method as claimed in claim 6 wherein said wear resistant compound comprises 50%-70% PTFE, 10%-30% graphite, and 10%-30% of tin/bronze all by volume.
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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |