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:
Feb. 16, 2010
Filed:
May. 06, 2005
Takayuki Hoshino, Osaka, JP;
Takayuki Hoshino, Osaka, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
The present invention may provide a accurate drive unitwhich comprises an electromechanical transducer, a drive elementfixed on the one end of the electromechanical transducer, a movable elementengaging with the drive elementfrictionally and a drive circuitapplying a cyclic drive voltage to the electromechanical transducer, in which the oscillation of the drive elementas the result of the expansion and contraction of the electromechanical transducerdue to the drive voltage causes relative displacement of the movable elementto the drive element. The waveform of drive voltage is varied according to the relative position of the movable elementto the drive element