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:
Apr. 07, 2009
Filed:
Jan. 11, 2005
Applicants:
Jürgen Dick, Laaber, DE;
Heinz Lixl, Regensburg, DE;
Martin Simmet, Bad Abbach, DE;
Inventors:
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L /83 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an actuator unit, the piezo actuator () is located inside a tubular spring () under pre-stress. To compensate the thermal length modifications of the piezo actuator () in relation to the actuator housing (), the compensation element is configured as an aluminium compensation cylinder () that is situated in an extension tube (). The piezo actuator () and the compensation cylinder () are mounted in series and conjointly pre-stressed by means of the tubular spring () that is extended in relation to the actuator housing by the extension tube ().