Automatic self-resetting parking brake
CA 2011341 C · Owner: Knorr Brake Holding Corporation · Inventors: Engle, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A parking brake having an output lever connected at a first pivot point to a brake rod, at a second pivot point to a automatic fluid responsive actuator and at a third point to one end of a chain of a standard manual releaseable parking brake unit. The other end of the chain is conencted to a reset lever which is activated by the automatic actuator to reset the manual parking brake unit after manual release and during automatic release. The automatic actuator includes an air spring to drive a piston and a simple interlock valve connecting the air spring to a brake line.
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
- Filed March 2, 1990 and granted June 8, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2012.
- 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.