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:
Sep. 08, 1992
Filed:
Aug. 29, 1991
Applicant:
Inventor:
Etsuro Furutsu, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
318116 ; 310316 ;
Abstract
In a vibration wave motor, during the actuation of the vibration wave motor during which a detection signal from a vibration detecting electro-mechanical energy converting element is unstable or when the driving voltage is low, driving is effected in the open loop mode which does not use the detection signal, and when the detection signal is stable, driving is effected in the mode which uses the detection signal, i.e., the PLL control mode.