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Patent Searching and Data


Title:
ACTUATOR
Document Type and Number:
Japanese Patent JPH0374603
Kind Code:
A
Abstract:

PURPOSE: To prevent the occurrence of a discharge between electrode layers and connecting members by forming a pair of electrode layers on both sides of piezoelectric elements, and applying the voltage so that polarities of electrode layers formed on opposite sides are made the same.

CONSTITUTION: A piezoelectric actuator 3 is constituted of two cylindrical piezoelectric elements 4 and 5 concentrically arranged and having different diameters. Electrode layers are formed on the inner side and the outer side of each piezoelectric element over nearly the whole surface respectively. The voltage is applied so that polarities of electrode layers formed on opposite sides of two adjacent piezoelectric elements 4 and 5 are made the same. No discharge occurs between electrode layers and connecting members.


Inventors:
Tsutsui, Osamu
Sawai, Mikio
Horiuchi, Hiroshi
Arita, Kinya
Application Number:
JP1989000210999
Publication Date:
March 29, 1991
Filing Date:
August 16, 1989
Export Citation:
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Assignee:
TOTO LTD
International Classes:
F15B7/08; (IPC1-7): F15B7/08