Patent ID: 6781289
Filing Date: 2004-08-24
Classification: F02M,H01L

Abstract:
A piezoelectric actuator, comprisingat least one piezoelectric element for subjecting an actuating element to a tensile or compressive stress, said piezoelectric element having a moving end and a fixed end opposite the moving end, a foot part (3) to which the fixed end of the piezoelectric element (2) is secured and by way of which the piezoelectric element (2) is kept centered in a housing (8) under a mechanical prestressing, a sleeve (4, 20) secured to the foot part (3) and surrounding the piezoelectric element (2) In such a way as to stabilize the sleeve (4, 20) mechanically, at least in regions that are electrically insulated from the piezoelectric element, the housing (8) having a retaining bore (5) for receiving the piezoelectric actuator and into which the sleeve (4, 20) together with the piezoelectric element (2) are firmly press-fitted optionally via an oblique shoulder (7) on the periphery of the retaining bore (5).