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, 2021
Filed:
Nov. 11, 2019
Horiba Stec, Co., Ltd., Kyoto, JP;
Hideaki Miyamoto, Kyoto, JP;
HORIBA STEC, Co., Ltd., Kyoto, JP;
Abstract
A piezo actuator is provided which is capable of continuing a provisional operation at least in a limited movable range without bringing an operation to a complete stop even upon occurrence of dielectric breakage. The piezo actuator includes a plurality of piezo blocks and a driving circuit. The piezo blocks are formed by alternately stacking a piezoelectric ceramic layer and an electrode layer. The driving circuit is connected to the piezo blocks. The piezo blocks are arranged in an extension/contraction direction. The driving circuit includes a power source part to which the piezo blocks are individually connected in parallel, and a plurality of limiting resistors respectively disposed in series to the piezo blocks.