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:
Apr. 07, 1998
Filed:
Apr. 17, 1996
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
318116 ; 310316 ;
Abstract
This invention relates to a vibration wave motor which forms a vibration wave on a vibrating member by applying frequency signals having a phase difference therebetween to electro-mechanical energy conversion elements, and uses the vibration wave as a driving force. This invention provides a motor apparatus in which a disturbance component input to the motor apparatus is estimated based on input and output signals to the motor, and the estimated disturbance component is negatively fed back, thereby eliminating the influence of a disturbance.