Metering and proportioning valve mechanism
CA 1048087 A · Owner: Kelsey-Hayes Company · Inventors: Doerfler, Roger E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dual hydraulic brake system incorporating a dual master cylinder for separately pressurizing the front end rear brakes of a vehicle. A pressure limiting device is positioned in the brake system for the front wheels which have disc-type brakes. The device prevents the front brakes from being energized until the rear drum-type brakes are functioning and then proportions the pressure applied to the front brakes. Also an apparatus for, providing an indication to the operator of failure of either the front or rear brakes, which apparatus will automatically reset itself upon correction of the failure, is positioned adjacent the pressure limiting device and is responsive to fluid pressure 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
- Granted February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.