Brushless direct current motor having adjustable motor characteristics
CA 2282752 A1 · Owner: Mts Systems Corporation · Inventors: Anderson, William G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brushless direct current motor (10) includes a permanent magnet rotor (16) and a set of stator windings (14). The motor (10) further includes a circuit (22) for changeably connecting the set of stator windings (14) to operate in a first electrical configuration or a second electrical configuration. In the second electrical configuration, the circuit (22) connects only some of the stator windings for receiving current. The circuit (22) electrically isolates the unused stator windings from the used or connected stator windings.
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 May 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2019.
- 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.