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:
Nov. 05, 2013
Filed:
Feb. 29, 2012
Makoto Tani, Inazawa, JP;
Makoto Tani, Inazawa, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A piezoelectric actuatoraccording to each embodiment of the present invention comprises: a column-like piezoelectric body, whose bottom face is fixed to a base portion, and which stands from the base portion; and a driving power supply section for applying a driving voltage to the piezoelectric body. The piezoelectric body includes two sets () of a pair of electrodes for providing electrical fields to the piezoelectric body. The two sets are formed so that each of the two sets is provided to each of two regions into which the piezoelectric body is divided by a virtual plane VPLparallel to the center axis CL of the piezoelectric body. The driving power supply section applies the driving voltage Vin having a 'frequency between the second-order bending resonant frequency and the first-order expansion-contraction resonant frequency' to either one of the two sets, selectively.