Piezoelectric vibrator for ultrasonic motor, process for producing the same, method of mounting piezoelectric vibrator and ultrasonic motor
CA 2174515 C · Owner: Kawasaki, Mayumi · Inventors: Kawasaki, Mayumi; Kanayama, Kouichi; Maruko, Nobuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The piezoelectric vibrator for ultrasonic motors of the present invention is one capable of causing a piezoelectric vibrator component to generate a longitudinal vibration/bending vibration to thereby drive a moving element, said piezoelectric vibrator comprises a piezoelectric vibrator component and, bonded thereto through an elastic member, either a mounting member having means for bonding with a fixture or a fixture. This piezoelectric vibrator for ultrasonic motors is free from lowering the resonance characteristics of the piezoelectric vibrator component and enables operating the ultrasonic motor in high efficiency. Further, the assembly of the piezoelectric vibrator into the …
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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 August 11, 1995 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2017.
- 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.