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:
Dec. 03, 1985
Filed:
Oct. 10, 1984
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310334 ; 310326 ; 73644 ;
Abstract
An improved ultrasonic transducer including an oscillation housing composed of a cylindrical side plate and a wave transmitting and receiving top plate provided at one end of the side plate, a piezoelectric element integrally bonded to the inside of the top plate for oscillation therewith, and electrodes arranged on the piezoelectric element so that ultrasonic waves may be generated from the top plate when an electric field is applied to the electrodes and/or an electric output is delivered from the electrodes when the top plate receives ultrasonic waves. The improvement includes the oscillation housing which is formed, at least in its top plate, of a porous plastic material.