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:
Oct. 15, 2002
Filed:
Feb. 08, 2001
Applicant:
Inventor:
C. Ronald Coffin, Topsfield, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 2/500 ;
U.S. Cl.
CPC ...
H04R 2/500 ;
Abstract
A compound driver acoustic transducer. A frame supports a motion generator to one side of two diaphragms. An intermediate diaphragm is continuous and is driven by the motion generator. The intermediate diaphragm forms a closed volume with a solid portion of the frame that opens into a central opening through the other, open diaphragm. An axially rigid coupling connects the two diaphragms so they operate in unison.