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:
Sep. 01, 1981
Filed:
May. 08, 1979
Applicant:
Inventor:
Bernard Tocquet, Sanary-sur-Mer, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
367163 ; 367155 ; 367160 ; 367174 ;
Abstract
A new piezoelectric transducer incorporated with a mechanical amplifier is described. The transducer comprises a rigid base plate; two lateral plates whose lower edge is connected to the plate by a thin portion; a stack of piezoelectric elements having alternate electrodes; a horn formed of a flexible elastic diaphragm which connects together the upper edges of the two plates; an enclosure and a sealing skin which is acoustically transparent. The tranducer is capable of emitting or receiving high power acoustic waves of very low frequencies including for instance, a few Hertz to 500 Hz.