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:
May. 05, 1987
Filed:
Jan. 04, 1985
Applicant:
Inventor:
Akio Kumada, Kokubunji, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310333 ; 310323 ; 310328 ;
Abstract
A torsional mode ultrasonic vibrator is formed by integrally combining a piezoelectric thickness vibrating element and a cylindrical torsional mode resonator. Furthermore, a torsional mode piezoelectric motor is provided in such a manner that a rotor and a stator are pressed to each other so that a rotational torque can be generated by the vibration at the contacting surfaces therebetween and a piezoelectric thickness vibrator and a torsional mode ultrasonic vibrator formed by an integral combination of a torsion coupler and a torsional mode ultrasonic resonator are used as the source of the ultrasonic vibration.