Variable cross-section piezoelectric actuator

Details Variable cross-section piezoelectric actuator Variable cross-section piezoelectric actuator

1988-01-11

1989-03-21

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310366, 310369, H01L 4108

Patent

active

048146595

ABSTRACT:
A piezoelectric actuator having an active module formed by laminating a plurality of piezoelectric elements, in which the cross-sectional area of the element proximate the fixed end of the module is larger than that of the element proximate the movable end thereof. When the active module expands or contracts, the elements proximate the fixed end receive an inertial load of the elements proximate the movable end. Due to the above structure, a decrease in the inertial load can be realized, thereby preventing the elements near the fixed end from being damaged.

REFERENCES:
patent: 3501099 (1970-03-01), Benson
patent: 4384230 (1983-05-01), Wisner
patent: 4457636 (1984-07-01), Nusser
patent: 4460842 (1984-07-01), Waanders et al.
patent: 4510412 (1985-04-01), Suda et al.
patent: 4570098 (1986-02-01), Tomita et al.
patent: 4633120 (1986-12-01), Sato et al.

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