Coupler yoke
CA 2111804 C · Owner: Maritime Steel And Foundries Limited · Inventors: Holmes, Ralph V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A yoke for a railway draft gear has a head portion comprising two opposed top and bottom walls and two opposed spaced apart side walls disposed between the top and bottom walls. Each of the side walls includes a respective elongate opening capable of operatively receiving therein a draft key of the railway draft gear and a reinforcing portion surrounding a forward end of the opening and extending rearwardly along substantially the entire length thereof. The reinforcing portion comprises a thickened nose portion surrounding a forward end of said key slot. A pair of buttress portions are disposed on respective sides of the opening and extend substantially the entire length thereof from a …
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 December 17, 1993 and granted January 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2015.
- 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.