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:
Jul. 11, 2000
Filed:
Dec. 03, 1997
Applicant:
Inventors:
Takeshi Yamaguchi, Osaka, JP;
Masahiro Takada, Toyohashi, JP;
Noboru Nomura, Kyoto, JP;
Osamu Kawasaki, Kyotanabe, JP;
Hirotaka Ishihara, Kosai, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04R / ; H04R / ; H04R / ;
U.S. Cl.
CPC ...
310334 ; 310328 ;
Abstract
In an ultrasonic transmitter-receiver for an apparatus for measuring the position or distance of an object, a composite vibrating unit is constructed with a piezoelectric vibrator and a cone, wherein a substantial conical vertex of the cone is connected to a center of vibration of the piezoelectric vibrator, and a node of vibration is generated on the cone at positions symmetrical about its center axis when the piezoelectric vibrator vibrates with deflection.