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. 06, 2008
Filed:
Oct. 22, 2004
Bjoern B. Magnussen, Iserlohn, DE;
Peter C. Varadi, El Cerrito, CA (US);
Kai Wolf, Wiesbaden, DE;
Benjamin Hagemann, Dortmund, DE;
Dieter A. Schuler, Stuttgart, DE;
Erick M. Davidson, El Cerrito, CA (US);
Bjoern B. Magnussen, Iserlohn, DE;
Peter C. Varadi, El Cerrito, CA (US);
Kai Wolf, Wiesbaden, DE;
Benjamin Hagemann, Dortmund, DE;
Dieter A. Schuler, Stuttgart, DE;
Erick M. Davidson, El Cerrito, CA (US);
Elliptec Resonant Actuator Aktiengesellschaft, Dortmund, DE;
Abstract
The invention relates to a piezoelectric motor comprising a piezoelectric component that is connected to a resonator and a two-dimensional resonator that interacts with a movable. element, the resonator having principal surfaces that are parallel to each other and that are also identical in shape and size. The invention further relates to methods for producing such piezoelectric motors, wherein the resonators are manufactured by cutting a profiled, extruded bar into lengths or by cutting, preferably by punching, from sheet metal having constant thickness. Finally, this invention relates to a method for exciting such a piezoelectric motor, wherein the excitation frequency or frequencies is/are generated by the control electronics as a function of time in response to the respective peak current and/or in response to the respective phase minimum between current and voltage and/or in response to the change in phase.