Electric motor having a main axle and eccentric axles
CA 2006643 C · Owner: Kawai, Teruo · Inventors: Kawai, Teruo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric motor comprises a plurality of electromagnets (1a, 1b ....) arragned annularly in parallel, an electric switching circuit (8) connected-to each electromagnet (1a, 1b ....), an iron cylinder (4) arranged inside the electromagnets (1a 1b ....) and, having peripheral surface to be attracted partially arbitrarily by part of the electromagnets (1a 1b ....), a, main axle (5a) positioned at the center of the iron cylinder (4) and coaxially arranged with an axial core of the iron cylinder (4) via bearings (6, 7) and eccentric, axles (5b, 5b) provided at both ends of the main axle (5a) so that the eccentric axles (5b, 5b) are arranged in accord with the center of the electromagnets (1a …
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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 December 27, 1989 and granted March 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2011.
- 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.