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. 20, 2003
Filed:
Jun. 17, 2002
Applicant:
Inventors:
Christopher John A. Purcell, Dartmouth, CA;
Richard Alfred G. Fleming, Tignish, CA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/710 ; H04R 1/700 ;
U.S. Cl.
CPC ...
H04R 1/710 ; H04R 1/700 ;
Abstract
An underwater acoustic projector comprising a pair of spaced apart end walls with an acoustic driver positioned between the end walls, the driver having smaller cross-sectional dimensions than the end walls. Each end wall close one end of flared open ended pipe waveguides and is mechanically coupled to one end of a piezoelectric acoustic driver. The flared pipe waveguides extend outward from the driver and have a larger diameter at their open ends than at the end walls.