Claims
- 1. A composite bearing comprising:
a supporting shell having a surface; and a lubricating lining disposed on said surface comprising fibers of polytetrafluoroethylene wound with a second fibrous material, said fibers being in a polymeric matrix comprising polytetrafluorethylene particles and a wetting agent.
- 2. The composite bearing of claim 1, wherein 95% of the polytetrafluorethylene particles have a particle size of less than 500 micro inches.
- 3. The composite bearing of claim 1, wherein 95% of the polytetrafluorethylene particles have a particle size of greater than 200 micro inches.
- 4. The composite bearing of claim 1, wherein the polymer matrix comprises less than 15% by weight of polytetrafluoroethylene particles.
- 5. The composite bearing of claim 1, wherein the polymer matrix comprises greater than 1% by weight of polytetrafluoroethylene particles.
- 6. The composite bearing of claim 1, wherein the wetting agent comprises a non-ionic siloxane copolymer.
- 7. The composite bearing of claim 1, wherein said second fibrous material comprises a polymeric fiber twisted together with said polytetrafluoroethylene fibers.
- 8. The composite bearing of claim 7, wherein said polymeric fiber comprises a resin-bondable yarn.
- 9. The composite bearing of claim 7, wherein said polymeric fiber comprises polyester, nylon, aramid or cellulosic fibers.
- 10. The composite bearing of claim 7, wherein said polymeric fiber and polytetrafluoroethylene fibers are disposed within a resinous material.
- 11. The composite bearing claim 7, wherein said resinous material comprises a thermosetting polymer.
- 12. The composite bearing of claim 9, wherein said polymeric shell comprises a resinous material.
- 13. The composite bearing of claim 9, wherein said polymeric shell comprises a thermosetting polymer.
- 14. The composite bearing of claim 13, wherein said polymeric shell further comprises fiberglass.
- 15. A self-lubricating composite bearing comprising:
a shell comprising reinforced thermosetting resin having a surface thereon; and a lining disposed on said surface of said shell, said lining comprising polytetrafluorethylene particles, a wetting agent, and a plurality of wound fibers disposed within a thermosetting matrix, wherein the plurality of fibers comprises polytetrafluoroethylene and at least one of polyester or nylon.
- 16. The self-lubricating composite bearing of claim 15, wherein the plurality of wound fibers are helically wound.
- 17. The self-lubricating composite bearing of claim 15, wherein the wetting agent comprises a non-ionic siloxane copolymer.
- 18. The self-lubricating composite bearing of claim 15, wherein 95% of the polytetrafluorethylene particles have a particle size of between 200 micro inches and 500 micro inches.
- 19. A method for manufacturing a composite bearing comprising:
disposing a plurality of fibers comprising polytetrafluoroethylene and second fiberous material onto a mandrel, said fibers being disposed in a thermosetting resin comprising polytetrafluoroethylene particles and a wetting agent; and curing said thermosetting resin to form a rigid composite.
- 20. The method of claim 19, further comprising the step of removing said rigid composite from said mandrel.
- 21. The method of claim 19, wherein said disposing step comprises providing said plurality of fibers in the form of a helical winding.
- 22. The method of claim 19, wherein the thermosetting resin comprises an epoxy resin.
- 23. The method of claim 19 wherein said disposing step further comprises drawing said helical winding through a bath of epoxy resin comprising polytetrafluoroethylene particles and a wetting agent.
- 24. The composite bearing of claim 19, wherein 95% of the polytetrafluorethylene particles have a particle size of less than 500 micro inches.
- 25. The composite bearing of claim 19, wherein 95% of the polytetrafluorethylene particles have a particle size of greater than 200 micro inches.
- 26. The composite bearing of claim 19, wherein the polymer matrix comprises less than 15% by weight of polytetrafluoroethylene particles.
- 27. The composite bearing of claim 19, wherein the polymer matrix comprises greater than 1% by weight of polytetrafluoroethylene particles.
STATEMENT OF RELATED APPLICATION
[0001] The present application claims priority under 35 U.S.C. §119(e) from U.S. Provisional Application Ser. No. 60/464,842, filed Apr. 23, 2003, entitled “Self-Lubricating Filament Winding Composite Bearings,” the disclosure of which is incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60464842 |
Apr 2003 |
US |