Connection assembly for railway coupling devices
CA 2289302 C · Owner: Westinghouse Air Brake Company · Inventors: Daugherty, David W. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A connection assembly for use in either an articulated coupling arrangement and/or a slackless drawbar arrangement for connecting together adjacently disposed ends of a pair of railway vehicles in a semi-permanent manner is provided. The connection assembly comprises a spherical member and a modified male connection member wherein the male connection member includes an aperture and a portion of the inner surface of the male connection member formed by this aperture forms a part of the inner surface upon which the spherical member rotates against. The inner surface of the modified male connection member includes a portion which is engageable with a retainer member to hold the spherical …
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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 November 10, 1999 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 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.