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. 20, 2010
Filed:
Apr. 29, 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 control unit for controlling an ultrasonic actuator. The control unit performs switching between a normal operation mode in which the piezoelectric element unit vibrates at a frequency close to a resonance frequency of longitudinal vibration in the lengthwise direction of the piezoelectric element unit and a resonance frequency of bending vibration to let the ultrasonic actuator output a driving force and a heating mode in which the piezoelectric element unit vibrates at a frequency close to a resonance frequency of longitudinal vibration in the thickness direction of the piezoelectric element unit to heat the piezoelectric element.