Motor controls
CA 2116804 C · Owner: Fortune, Glenn Clark · Inventors: Kelledes, William L.; Fortune, Glenn Clark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrically actuated shifting mechanism (10) includes a reversible rail select electric motor (34) and a reversible in-gear electric motor (36). Three groups of switches (64, 66, 68) are provided to effect one-at-a-time operation of the motors (34, 36) with a center group of switches (66) being used to effect operation of either the rail select or the in-gear motor and to determine the direction of operation of the motor. In one embodiment of the invention, the motor control circuitry also controls the operation of a main clutch motork (168). Four groups of switches (64a, 66a, 68a, 166) are used to effect operation of the in-gear, rail select and clutch motors (34a, 36a, 168) in desired …
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, 1994 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2016.
- 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.