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:
Mar. 16, 2010
Filed:
May. 05, 2008
Masaru Higashionji, Osaka, JP;
Hideaki Mukae, Hyogo, JP;
Yusuke Adachi, Osaka, JP;
Eiichi Nagaoka, Hyogo, JP;
Masaru Higashionji, Osaka, JP;
Hideaki Mukae, Hyogo, JP;
Yusuke Adachi, Osaka, JP;
Eiichi Nagaoka, Hyogo, JP;
Panasonic Corporation, Kadoma, JP;
Abstract
A drive unit includes a guide, a stage which is movable relative to the guide, an ultrasonic actuator for moving the movable body and a control unit for controlling the ultrasonic actuator. The ultrasonic actuator includes a driver element in contact with the stage and is fixed to the guide. A surface of the stage in contact with the driver element is an undulating surface. The control unit detects the position of the stage based on a change in contact pressure on the driver element due to the undulating surface.