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:
Oct. 25, 2016
Filed:
Feb. 21, 2007
Thomas Kuehn, Mannheim, DE;
Thomas Kuehn, Mannheim, DE;
PEPPERL + FUCHS GmbH, Mannheim, DE;
Abstract
The invention relates to an inductive proximity switch having a current-fed resonant circuit comprising at least one resonant circuit transmitting coil and a capacitance. The resonant circuit transmitting coil generates an alternating magnetic field, which is able to induct a mutual induction voltage in at least one receiving coil, and the oscillation state of the resonant circuit can be influenced by a metallic release entering or moving away from the alternating field, having an evaluating circuit for obtaining a switching signal from the change in the oscillation state of the resonant circuit, the change in the complex coupling between the at least two coils, namely transmitting coil and receiving coil, being evaluatable with the aid of an auxiliary voltage signal as a switching signal in the presence or absence of the release.