Brake assurance module
CA 2203606 C · Owner: Wood, James A. · Inventors: Wood, James A.; Mazur, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brake assurance module assures braking on at least one truck. It includes a summer a level circuit, a delay circuit, an, emergency driver a valve driver and a timer circuit. The summer sums friction and dynamic braking signals into a total braking signal. The level circuit generates a threshold signal when the total braking signal exceeds a threshold. The delay circuit generates a level signal after having received the threshold signal throughout a preset time. When the emergency driver receives an emergency signal, it conveys a detect signal. The valve driver controls contacts each in series within a control line used to energize a valve whose operation is normally controlled by the …
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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 April 24, 1997 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2019.
- 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.