Railway draft appliances – Cushioned – Drawbars
Reexamination Certificate
2005-09-06
2005-09-06
Jules, Frantz F. (Department: 3617)
Railway draft appliances
Cushioned
Drawbars
C213S074000, C386S206000, C074S57900F, C403S122000
Reexamination Certificate
active
06938786
ABSTRACT:
An improved ball and race connection assembly for use in connecting together adjacently disposed ends of railway vehicles is provided. This ball and race connection assembly is particularly useful as a connection member in slackless type drawbar assemblies. The improved ball and race connection assembly includes a race member which is formed from a polymeric and/or composite material, specifically a resin impregnated filament wound material which is wound on a polytetrafluoroethylene/polyester mesh sleeve and cured. The use of these materials enables the race member to have sufficient strength and to be self-lubricating, thus eliminating the costs of providing a lubricating material at the ball and race interface, as is necessary when using a metal race, as well as reducing the amount of friction at this interface resulting in lower L/V ratios. Also, the filament wound race member is light-weight, resulting in an overall weight reduction of the railway vehicle connection assembly, easier to manufacture than currently used metal race members, and has excellent corrosion resistance.
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Ring Michael E.
James Ray & Assoc.
Jules Frantz F.
Westinghouse Air Brake Technologies Corporation
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