Universal wheel slip force control logic
CA 2227299 C · Owner: Wood, James A. · Inventors: Schweikert, David E.; Wood, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method in part enables a wheel slip control system that controls slip on a per axle basis to control slip on a per truck basis. The wheel slip control system issues on a per axle basis an axle reduction signal indicative of a percentage by which to reduce the braking force that would normally be applied to one wheel/axle combination on a truck of a rail vehicle. The method includes the step of converting the axle reduction signals issued on a per axle basis to a truck reduction priority signal indicative of a percentage by which to reduce the braking force on a per truck basis. For rail vehicles featuring dynamic braking equipment another step involves commanding the dynamic braking …
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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 January 16, 1998 and granted June 11, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2020.
- 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.