Piezoelectric actuator device

Details Piezoelectric actuator device Piezoelectric actuator device

Filed on

2006-03-21

Date issued

2006-03-21

Examiner

Dougherty, Thomas M. (Department: 2834)

Patent Class

Electrical generator or motor structure

SubClass

Non-dynamoelectric

SubSubClass

Piezoelectric elements and devices

Other Related Categories

C310S316010, C310S317000, C310S318000, C310S319000, C331S1160FE, C331S155000

Type

Reexamination Certificate

Status

active

Patent number

07015621

Description

ABSTRACT:
The present invention relates to a piezoelectric actuator device that enables hysteresis of the amount of displacement in the piezoelectric actuator to be reduced, enables the system configuration to be simplified, and for which a high voltage need not be applied. A first circuit1comprises a piezoelectric actuator element11and a first resistor circuit12,and the piezoelectric actuator element11and first resistor circuit12are connected in parallel. A second circuit2comprises a capacitor circuit21and a second resistor circuit22,and the capacitor circuit21and second resistor circuit22are connected in parallel. The first circuit1and second circuit2are connected in series to form a series circuit, and both ends of that series circuit are led to a pair of input terminals T1and T2.

REFERENCES:
patent: 2913580 (1959-11-01), Kosowsky
patent: 3054966 (1962-09-01), Etherington
patent: 3772605 (1973-11-01), Otajima et al.
patent: 5955819 (1999-09-01), Takano et al.
patent: 63-204672 (1988-08-01), None
patent: 1-202178 (1989-08-01), None
patent: 9-327181 (1997-12-01), None
patent: 2836328 (1998-10-01), None

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