Patent ID: 6794800
Filing Date: 2004-09-21
Classification: F02M,H01L

Abstract:
A piezoelectric actuator, especially for actuating valves in motor vehicles, having an actuator body (1) in the form of a multilayer laminate of layered plies of piezoelectric material and intervening electrically conductive layers (2a, 2b), acting as electrodes, which are contacted in alternation by outer electrodes (3, 5), facing one another on the jacket side in the longitudinal direction of the actuator body (1), which outer electrodes (3, 5) are in the form of electrode strips (3), and additional electrodes (5), and the outer electrodes (3, 5) are in contact with electric terminal leads (7) for connecting the piezoelectric actuator to an electrical voltage, wherein the additional electrodes (5) are in contact at a plurality of points, via narrow elastic feet (6), with the electrode strips (3).