Antilock brake system and method incorporating a pressure feedback
CA 2038807 C · Owner: Murphy, Bryan R. · Inventors: Peck, David E.; Murphy, Bryan R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air brake system for a truck includes a treadle valve, a pilot control isolation valve an exhaust valve, a, relay valve, an air pressure transducer a wheel speed, sensor, an electronic control unit (ECU) and an air brake chamber associated with a brake actuator. In heavy braking operations, the pilot system pressure rise rate is monitored and restricted by modulation of the pilot control isolation valve. During heavy braking operations if braking of the, vehicle wheel results in a wheel velocity change which exceeds a predetermined deceleration threshold the pressure, rise rate is further restricted in attempt to "creep" up on the brake system pressure at which the lock condition is …
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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 March 21, 1991 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2013.
- 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.