Piezoelectric actuator

Details Piezoelectric actuator Piezoelectric actuator

2006-04-20

2009-08-25

SanMartin, Jaydi (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S355000, C310S354000, C310S353000

Reexamination Certificate

active

07579754

ABSTRACT:
A piezoelectric actuator that can be operated in the d31 mode and which controls the potential energy of a spring is disclosed. The d31 mode of operation provides large actuator displacement and the potential energy of the spring significantly increases the force and work produced by the actuator. In a first embodiment, a single piezoelectric element, operating in the d31 mode, controls the potential energy of the spring. In another embodiment, two piezoelectric elements, both operating in the d31 mode, control the potential energy of the spring.

REFERENCES:
patent: 4435666 (1984-03-01), Fukui et al.
patent: 4983876 (1991-01-01), Nakamura et al.
patent: 7119478 (2006-10-01), Mentesana

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