Methods of and/or apparatus for braking an electronically commutated motor and/or laundry machines incorporating the same
CA 2057997 C · Owner: Fisher & Paykel Limited · Inventors: Glucina, Anthony Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of braking an electronically commutated motor (ECM) by connecting a braking resistor across the motor supply rails and controlling the commutation, sequences of the motor. The commutation switching devices are controlled to commutate power generated in said windings by rotation of the motor rotor to the power supply ratio. The pawer commutated to the supply rails is dissipated in the braking resistance to brake the motor.
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 December 18, 1991 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2013.
- 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.