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:
Apr. 24, 1979
Filed:
Jul. 25, 1977
Applicant:
Inventor:
Bernard Tocquet, Sanary, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310337 ; 340 10 ; 340-9 ; 340 / ;
Abstract
Piezoelectric transducers and antennas comprising a plurality of identical transducers arranged coaxially, each transducer comprising a ring and a plurality of piezoelectric motor elements arranged radially against the inner wall of the ring. The rings form an envelope which is closed by two covers and the envelope encloses an axial cylindrical channel containing a piston. The inside of the envelope contains a solid material which is elastomeric or rigid and is separated from the inner walls of the envelope by a small clearance which communicates with the end of the cylinder. An application is the construction of acoustic antennas intended to be immersed to great depths.