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. 29, 2002
Filed:
Feb. 17, 1999
C. Ronald Coffin, Topsfield, MA (US);
Other;
Abstract
A dual-cone loudspeaker includes a primary speaker cone and an axially displaced secondary speaker cone mounted to the back of a magnet structure. A rigid link causes both cones to move in unison. The rigid link includes an open support structure with equiangularly extending spokes that form a central hub. A ring circumscribes the spokes and ataches to the first speaker cone. A rigid element connects to the spokes and the secondary speaker cone so the primary and secondary speaker cones move in unison and improve the bass response for the loudspeaker. The rigid coupling device is also adapted to support a high frequency radiator to extend the overall loudspeaker frequency response into higher frequencies.