Motor driven step switch
CA 2134682 C · Owner: Okanik, Peter · Inventors: Okanik, Peter; Dohnal, Dieter; Stadelmayer, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A step switch for step transformers has a motor drive with a driving unit and an information unit. Whereas the driving unit contains in a manner known per se the driving motor and its control that actuates it depending on the direction of the rotation the, information unit contains, according to the invention the follow-, ing means: a sensor for detecting the absolute value of the instant position of the step switch; non-volatile storage means for the step position; non-volatile storage means for the position of the step switch within a step position range; means for recognizing an end position of the step switch; programmable means for storing specific step switch data; serial data …
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 April 7, 1993 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2015.
- 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.