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:
May. 31, 1994
Filed:
Feb. 24, 1993
Applicant:
Inventors:
Thomas J Danley, Highland Park, IL (US);
Charles A Rey, Riverwoods, IL (US);
Assignee:
Intersonics Incorporated, Northbrook, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381182 ; 381186 ; 381192 ;
Abstract
A loudspeaker has a rigid sound radiator having a free edge and a electromagnetic drive mounted on an opposed hub edge and arranged to produce a torque on the radiator. Either a coil or a permanent magnet of the drive is mounted directly on the hub edge and has a radius which is substantially smaller than the radius of the radiator.