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. 15, 1997
Filed:
Apr. 18, 1995
Applicant:
Inventor:
Seiji Takei, Kanagawa, JP;
Assignee:
Nippon Thompson Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; H01L / ;
U.S. Cl.
CPC ...
7442 / ; 310323 ;
Abstract
A drive apparatus equipped with a ball screw and a plurality of nuts achieves compact size while maintaining output. The above-mentioned effect is obtained by employing ultrasonic motors, concentric with the nuts and ballscrews, which are flat and able to maintain a high output, for driving the nuts.