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:
Jun. 21, 1977
Filed:
Apr. 07, 1976
Francois L Lefaudeux, Le Relecq-Kerhoun, FR;
Michel Georges Quivy, Six Fours Les Plages, FR;
Etat Francais, Paris, FR;
Abstract
A hydrophone comprising an acoustical reflector constituted by a sealed, flexible and deformable container containing two rigid parallel plates separated by lattice sheets of interlaced filaments and at least one piezoelectric transducer with a thin flexible blade fixed at its periphery to a rigid annular support. The reflector and the transducer are entirely embedded in a common synthetic resin layer having a thickness of several millimeters which secures them together and maintains the transducer in proximity to the front face of the acoustical reflector. The layer of resin has a reduced thickness of the order of 1 mm facing the transducer.