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:
Jul. 18, 2017
Filed:
Jan. 22, 2015
Siemens Aktiengesellschaft, Munich, DE;
Sebastian Martius, Forchheim, DE;
Benjamin Sewiolo, Obermichelbach ot Rothenberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
To make the charging of hearing aids more convenient, a charging device for wirelessly charging a hearing aid is provided. The charging device has a cylindrical container, an integrated antenna for generating an alternating magnetic field in the container in the event of electrical excitation, and a charging circuit which can be used to electrically excite the antenna. The antenna is a birdcage antenna in which rods are arranged parallel to a cylinder axis on a cylinder jacket and the ends of the rods at the edges of the cylinder jacket are each connected to an end ring. A switching element is arranged in each of the rods. The charging circuit is used to alternately generate a circular magnetic field, in which case the switching elements are operated in a closed mode, and a linear magnetic field, in which case the switching elements are operated in an open mode.