Slackless drawbar assembly using an improved ball and race connection assembly
CA 2260669 C · Owner: Westinghouse Air Brake Company · Inventors: Daugherty, David W. Jr.; Ring, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 4, 1999 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.