The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 1988
Filed:
Apr. 30, 1987
Takayuki Tsukimoto, Fujisawa, JP;
Ichiro Okumura, Yokohama, JP;
Takuo Okuno, Yokohama, JP;
Kazuhiro Izukawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A vibration wave motor has a circular vibration member for generating a travelling vibration wave in response to application of a periodic voltage to phase-differentially arranged or polarized electro-mechanical energy transducers. A movable member is frictionally driven by the travelling vibration wave. A ring-shaped circular vibration absorption member is provided for absorbing vibration of the vibration member. The vibration absorption member has an outer diameter smaller than an outer diameter of the vibration member so as not to absorb energy at the outer circumference of the vibration member.