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. 18, 2012
Filed:
Dec. 22, 2010
Masaichi Miyano, Tokyo, JP;
Masaichi Miyano, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A piezoelectric actuator has a piezoelectric element and a frictional portion. The piezoelectric element simultaneously generates first and second vibration modes in response to a voltage applied thereto. The frictional portion is arranged on an outer surface of the piezoelectric element and adapted to come into contact with a body to be driven and cause a frictional force therewith. The frictional portion has a glass-containing portion containing a glass material and being aimed such as to project from the outer surface of the piezoelectric element. Without restricting the size of the piezoelectric element, the piezoelectric actuator inhibits its driving state from fluctuating.