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:
Nov. 18, 2008
Filed:
Oct. 02, 2001
Marius Bebesel, Munich, DE;
Peter Jaenker, Garching, DE;
Marius Bebesel, Munich, DE;
Peter Jaenker, Garching, DE;
EADS Deutschland GmbH, Ottobrunn, DE;
Abstract
A piezoelectric expansion actuator for d33 piezoelements, which allows vibrations in structures to be suppressed. An expansion actuator () includes a piezoelectric stack (), which consists of d33 piezoelectric elements and is arranged between output elements (), which are attached to the surface of the structure (). The invention applies to a piezoelectric extension actuator, which is used to control vibrations in structures. Alternatively, in order to damp vibrations between the main gearbox of a helicopter rotor and the cellular structure of the cockpit, a power application point of the output element () is arranged at a distance from the corresponding end plate of the piezoelectric stack () in the axial direction (X).