Electronically commutated, collectorless direct-current motor
CA 1292268 C · Owner: Pfendler, Klaus · Inventors: Feigel, Josef; Pfendler, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Electronically Commutated, Collectorless Direct-Current Motor, An electronically commutated collectorless direct-current, motor is disclosed whose stator has a drum winding and an external magnetic yoke surrounding same and whose rotor (4), consists of a shaft (7) a multipolar, permanent-magnet, body (12) and an internal magnetic yoke (11). To reduce the moment of inertia, the internal magnetic yoke (11) has kidney-shaped apertures (41). The direct-current motor (1) exhibits a good dynamic behavior and is used in data processing equipment. ZT/P2-Se/Sch J.Feigel-K.Pfendler 13-6 Stuttgart, February 29, 1988 4015A
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 November 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 2008.
- 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.