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:
Dec. 02, 2003
Filed:
Aug. 16, 1999
Applicant:
Inventors:
Paul Christiaan van Hal, Hoorn, NL;
Benno Hartog, Grootebroek, NL;
Assignee:
SonionMicrotronic Nederland B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 2/500 ;
U.S. Cl.
CPC ...
H04R 2/500 ;
Abstract
A transducer comprising a coil having a first air gap, a magnetic member having a second air gap and an armature. The armature includes an armature leg that extends through the first and second air gaps. The armature leg is capable of movement-within the air gaps. The magnetic member includes at least one nub extending into the second air gap. The nub limits the movement of the armature leg within the second air gap.