Appliance driven by an electric motor
CA 1215426 A · Owner: N.V.Philips'Gloeilampenfabrieken · Inventors: Bukoschek, Romuald L.; Diefenbach, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
11, ABSTRACT:, In an appliance driven by an electric motor a tool is driven via a drive mechanism by a self-starting two-pole single-phase synchronous motor (7) which comprises a diametrically magnetized permanent-magnet rotor (17) and a stalling device (12), which stops the rotor after a specific number of revolutions in at least one direction of rotation, upon which the direction of rotation is reversed automatically. The stalling device stops the rotor in positions in which the angle between the rotor-field vector (18) which intersects the rotor perpendicularly to the stator field (15) lies within an angular range (20, 21) of 60° in each direction of rotation of the rotor.
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 December 16, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 2003.
- 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.