Devices for applying freight train airbrakes on derailment
CA 1310038 C · Owner: Olson, Otilia F. · Inventors: Olson, Phillip W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improvements in devices designed to actuate the air brakes of a freight car when a derailment occurs; a device which operates to immediately detect a wheel derailment of a railway train and automatically brings the air brake system of the train into a state of emergency stop; a fail open system and apparatus including an air relief valve attached to a railway car and also connected to the air brake pipe of the air brake system, sensor cylinder and spring assemblies connected to the railroad car body at one end thereof and at the other end to the side frame of a railroad car truck adjacent the railroad car wheels, an oil reservoir in the air relief valve which, when full, maintains the air …
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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
- Granted November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.