Ultrasonic motor having a friction material comprising a rubber-like elastic material and aromatic polyamide fiber
CA 1262471 C · Owner: Imasaka, Yoshinobu · Inventors: Sumihara, Masanori; Tokushima, Akira; Yoneno, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ultrasonic motor comprising a vibrating stator having a piezoelectric element for producing a travelling wave an object to be driven, by driving force based on the travelling wave and a friction body comprising, a rbber-like elastic material and aromatic polyamide fiber for trasmitting the driving force from the driving stator to the object. The friction body is provided between the vibrating stator and the object in a manner to give sufficient contact therebetween to transmit the driving force by friction. The novel combination of rubber-like elastic material and aromatic polyamide fiber provides a motor haivng superior operating characteristics and longevity over conventional …
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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
- Granted October 24, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 24, 2006.
- 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.