Rotor for dynamo electric machine
CA 2134253 C · Owner: Mori, Takanobu · Inventors: Miyakawa, Kado; Mori, Takanobu; Shibata, Fumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a rotor for a dynamo electric machine serving as a synchronous generator as well as being designed to operate as a variable speed motor for starting a prime mover for the synchronous generator. The rotor is comprised of a rotor core, and a plurality of slots disposed around the circumference of the rotor core and extending along the axial direction of the rotor core. Rotor windings are accommodated in the slots and wedges are accommodated in the slots over the rotor windings near the surface of the rotor core for preventing the rotor windings from being pushed out of the slots due to the centrifugal force caused by rotation of the rotor. The wedges where …
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 October 25, 1994 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.