Railway electro-pneumatic brake valve and emulation method
CA 2298126 C · Owner: Westinghouse Air Brake Company · Inventors: Hart, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electro-pneumatic brake control valve for performing electronic emulation is provided, wherein multiple electronic valves control braking operations on freight cars. Multiple pressure, sensors are preferably used and particularly a brake pipe pressure sensor for detecting pneumatic, brake commands. In addition to using electronic valves to control brake application and release, operations, an electronic quick service valve can selectively exhaust brake pipe to the atmosphere, in a controlled rate and amount to assist the propagation of a quick service application and an, electronic accelerated release valve can selectively connect emergency reservoir to brake pipe to, assist in …
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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 February 4, 2000 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2022.
- 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.