Dynamic motor controller
CA 2000669 A1 · Owner: Hughes Aircraft Company · Inventors: Bohner, John J.; Conley, Peter L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high performance, lightweight and low cost dynamically controlled motor 10 is disclosed wherein the position control of the motor is accomplished by the use of an electronic braking apparatus 20. The dynamically controlled motor 10 of the present invention includes a standard electric motor 15 controlled by the electronic braking apparatus 20. The electronic braking apparatus 20 includes a piezoelectric transducer 50 which can be activated to provide a braking force to the rotor 35. The rotor 35 is rotated to the desired stopping location then the electronic braking apparatus 20 is activated by activating the piezoelectric transducer 50. The rotor 35 can thereby be held at the desired …
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 October 13, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2011.
- 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.