Hydraulically applied railway type freight car parking brake system
CA 2288427 C · Owner: Natschke, Scott L. · Inventors: Hawryszkow, Michael G.; Natschke, Scott L.; Ring, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulically applied railway type freight car parking brake system includes a source of hydraulic pressure disposed on the freight car for supplying a predetermined, fluid pressure sufficient to actuate and maintain the parking brake system in a brake, application position. A force transmitting cylinder is disposed on a truck portion of the, freight car in fluid communication with the source of hydraulic pressure for exerting a, predetermined force on at least one brake beam carrying a pair of brake shoes. The brake, shoes are brought into and maintained in frictional engagement with a portion of a, respective surface of a tread portion of a pair of wheels during an application of …
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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 October 17, 1996 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 17, 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.