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:
May. 15, 2007
Filed:
Jul. 26, 2005
Michael Denzler, Regensburg, DE;
Stefan Kohn, Hohenburg, DE;
Martin Neumaier, Regensburg, DE;
Roland Niefanger, Regensburg, DE;
Klaus Plecher, Zeitlarn, DE;
Andreas Voigt, Burglengenfeld, DE;
Claus Zumstrull, Regenstauf, DE;
Michael Denzler, Regensburg, DE;
Stefan Kohn, Hohenburg, DE;
Martin Neumaier, Regensburg, DE;
Roland Niefanger, Regensburg, DE;
Klaus Plecher, Zeitlarn, DE;
Andreas Voigt, Burglengenfeld, DE;
Claus Zumstrull, Regenstauf, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A method is described for improving the long-term stability of a piezoelectric actuator encased in a potting compound containing or forming hydrogen atoms. Oxygen is contained in the piezoelectric actuator's piezoelectric ceramic. Appropriate means are employed so that unsaturated bonds of the hydrogen in the potting compound will release less oxygen from the piezoelectric ceramic. One means consists in reducing the concentration of hydrogen in the potting compound, with appropriate thermal processes as a result of which the concentration of hydrogen will be reduced to below a predefined threshold being applied after the piezoelectric actuator has been encased in the potting compound. Means that form bonds with the hydrogen in the potting compound or duct oxygen thereto are provided in further embodiments.