Railway vehicle brake system
CA 2184867 C · Owner: Westinghouse Air Brake Company · Inventors: Hawryszkow, Michael G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A railway car parking brake system includes at least one reservoir containing a predetermined volume of a fluid type media. At least one cylinder is activated in a first direction by such fluid type media and is spring released in an axially opposed second direction. At least one fluid media type pump means is connected for fluid communication between such at least one reservoir and such at least one cylinder. Such pump means being connected to receive the fluid type media from such at least one reservoir via a first fluid supply line and to communicate such fluid type media to such at least one cylinder during a parking brake application via a second fluid supply line and to return such …
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 September 5, 1996 and granted November 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2018.
- 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.