Stator yoke for electrical apparatus
CA 1109916 A · Owner: Sony Corporation · Inventors: Kishi, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stator yoke for a DC brushless motor is comprised of a layer of insulating material of a predetermined thickness and a layer of magnetically permeable material which are bonded to each other by adhesive or the like. The magnetically permeable layer can be composed of several steel plates preferably of silicon steel, bonded to each other. The insulating layer in on embodiment is composed of a cloth-like material, for example, of glass fibers and a cured adhesive, filling the interstices of the cloth-like material and bonding the insulating layer to the magnetically permeable layer.
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
- Granted September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
- 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.