US Patent 7477002 Piezo-actuator

Patent 7477002 was granted and assigned to Epcos Ag on January, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Epcos Ag

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7477002

Date of Patent

January 13, 2009

Patent Application Number

10416080

Date Filed

November 7, 2001

Patent Primary Examiner

‌

Thomas M. Dougherty

Patent abstract

An actuator includes a stack of piezoelectric layers, and electrode layers between the piezoelectric layers. A stabilization element is attached to a side surface of the stack. The stabilization element fixes a height of the stack so that the height does not change when an operating voltage is applied to at least one of the electrode layers.