Brake control system
CA 1289169 C · Owner: New York Air Brake Corporation · Inventors: Rojecki, Walter E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A housing has a triple valve coaxially adjoining a proportioning piston valve end-to-end, the triple valve having supply lap and exhaust positions for governing pressure in a brake cylinder; and the proportioning piston valve being operable to sense an emergency signal in a brake pipe for delivering fluid from an emergency reservoir to the brake cylinder after the brake cylinder has been charged to substantially service pressure from an auxiliary reservoir. The triple valve and the proportioning valve piston are biased in opposite directions by the same biasing spring.
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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
- 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.