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:
Sep. 07, 2010
Filed:
Aug. 17, 2006
Jörg Grosser, Bad Abbach, DE;
Wilfried Klopfer, Regensburg, DE;
Bernward Reinker, Regenstauf, DE;
Hans-jürgen Romanowski, Bernhardswald, DE;
Jörg Grosser, Bad Abbach, DE;
Wilfried Klopfer, Regensburg, DE;
Bernward Reinker, Regenstauf, DE;
Hans-Jürgen Romanowski, Bernhardswald, DE;
BSH Bosch und Siemens Hausgeraete GmbH, Munich, DE;
Abstract
A capacitive proximity switch has an electrically conductive sensor surface, which is covered by an electrically non-conductive covering plate and which serves as a part of a capacitor with a capacitance that varies with proximity. The proximity switch includes a reference sensor surface for generating a reference signal for determining an actuation state of the proximity switch. Signal portions of the reference signal are proportional to the capacitance of a reference capacitor formed with the reference sensor surface, and the capacitance of the reference capacitor is determined by surrounding conditions of the sensor surface.