Friction shoe assembly for repair of worn railway truck
CA 2014529 C · Owner: Amsted Industries Incorporated · Inventors: Wronkiewicz, Robert D.; Moehling, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of repairing railway trucks in which the sloped surfaces of the truck bolster ends have become worn during service is provided that avoids the heretofore required restoring of the sloped surfaces with weld material. An improved replacement friction shoe having tapered elastomeric pads which conform to the abutting service worn sloped surfaces of the bolster ends is installed to greatly reduce further wear on the bolster ends.
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 April 12, 1990 and granted August 2, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.