Wedge-shaped disc brake shoe
CA 2203196 C · Owner: Westinghouse Air Brake Company · Inventors: Engle, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Brake shoe for application to the rim of a brake disc for retarding a rotary motion of the brake disc. The brake shoe has one or more brake pads having a pair of pad friction surfaces for contact with friction surfaces on the brake disc. The pair of pad friction surfaces are sloped in opposition to each other and, have an opening located between the pad friction surfaces. The brake shoe has a pad support structure to which the brake pad or brake pads are attached, the pad support structure serving to press the brake pad or brake pads against the friction surfaces on the brake disc. The pad support structure has a portion thereof for mounting on a device for positioning the brake shoe and …
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 21, 1997 and granted November 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2019.
- 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.