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:
Oct. 01, 1991
Filed:
Nov. 20, 1990
Applicant:
Inventor:
Masao Kosugi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310328 ; 310323 ; 310 83 ;
Abstract
A precision actuator includes a housing; an ultrasonic motor disposed in the housing and having a ring-like rotor and a stator; an output shaft; a rotation-restraint rectilinear motion guide for coupling the output shaft to the housing, slidably in an axial direction but unrotatably relative to it; and a screw mechanism for coupling the output shaft to the rotor.