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:
Jan. 24, 2012
Filed:
Sep. 04, 2007
Alfred Boehm, Viechtach, DE;
Wilhelm Binder, Tiefenbach, DE;
Valeri Keller, Deggendorf, DE;
Bartec Benke GmbH, Reinbek/Hamburg, DE;
Abstract
An apparatus relates to an approach warning system for detecting when a person approaches an object which has a metal outer structure at least in regions. The system is formed with at least a first near-field device which is associated with the object and a second near-field device which is associated with the person, wherein the first and the second near-field device form a transmission link for an electric near field, and with a warning device which outputs an approach warning signal when a person with the second near-field device enters a detection region in which a transmission of the near field via the transmission link takes place, wherein the first near-field device is connected, for the purpose of coupling to the near field, firstly to a stray field electrode and secondly to the metal outer structure of the object, so that the outer structure forms a counter-electrode for the stray field electrode, and wherein the near-field devices and the electrodes thereof are configured such that the detection region at least approximately encloses the entire outer structure of the object.