Motor rotation detector apparatus
CA 2301934 C · Owner: Itt Manufacturing Enterprises, Inc. · Inventors: Gu, Jin H.; Aler, Mark D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A leadless motor rotation detector apparatus for determining the direction of shaft rotation of a motor the motor of the type providing a fluctuating magnetic field when rotating the apparatus having at least two sensors separated a predetermined distance D1 from one another each sensor operable for sensing the magnetic field and generating a corresponding signal having an amplitude and phase associated with the sensed magnetic field; and a processor responsive to the signals for comparing temporal aspects associated with the relative phase of each of the signals to determine a leading signal the leading signal associated with a corresponding one of the at least two sensors and is …
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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 March 22, 2000 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2022.
- 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.