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. 30, 1997
Filed:
May. 02, 1995
Rudolf Wandl, Vienna, AT;
Kurt Schermann, Oberwart, AT;
Viennatone GmbH, Vienna, AT;
Abstract
A bone conducting hearing aid comprises a housing adapted to be pressed against a head of a user and a magnetic system held in the hearing aid housing, The magnetic system includes a permanent magnet, a coil, an armature of a soft magnetic material and a spring holding the armature. A conductor button is arranged to move with the armature, the conductor button being shaped to be brought into contact with the mastoid bone of the user's head, and a rubber bearing having a predetermined elastic constant holds a support spring for the conductor button on the hearing aid housing. To increase the difference between the useful signal and the spurious signal received by the hearing aid, the support spring has an elastic constant not exceeding 0.4 N/cm.