The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2004
Filed:
May. 21, 2001
Rudolf Heinz, Renningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a piezoelectric actuator, especially for actuating control valves or injection valves in motor vehicles, having an actuator body ( ) in the form of a multilayer laminate of layered plies of piezoelectric material and intervening metal or electrically conductive layers ( ), acting as electrodes, which are contacted in alternation by metal outer electrodes ( ), facing one another on the jacket side in the longitudinal direction of the actuator body ( ), that are at least in the form of laminar electrode strips ( ), and the outer electrodes ( ) are in contact with electric terminal leads ( ) for connecting the piezoelectric actuator to an electrical voltage. The piezoelectric actuator is characterized in that the outer electrodes ( ) also have additional electrodes ( ) that are in contact at a plurality of points, via narrow elastic feet ( ), with the laminar electrode strips ( ).