Materials of the cylinders of active-piston actuators

Details Materials of the cylinders of active-piston actuators Materials of the cylinders of active-piston actuators

2006-05-31

2009-08-04

SanMartin, Jaydi (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S369000, C310S346000

Reexamination Certificate

active

07569974

ABSTRACT:
The invention concerns an actuator which includes a linear piston (2) in an active material, and an inner sliding cylinder (7, 7′) which includes an outer cylinder (5, 5′) in which the said sliding cylinder ((7, 7′) is pre-stressed, with one cylinder being in an anisotropic material with a negative or approximately zero expansion coefficient along at least one axis and a positive or approximately zero expansion coefficient on at least one other axis, and the other cylinder having a positive thermal or approximately zero expansion coefficient.

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