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:
Mar. 25, 1997
Filed:
Jun. 05, 1995
Applicant:
Inventor:
Seiji Takei, Kanagawa, JP;
Assignee:
Nippon Thompson Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
7449009 ; 74 8915 ; 7442 / ; 74459 ; 108 20 ; 108143 ;
Abstract
A drive apparatus equipped with a ball screw which drastically improves the feeding accuracy of the driven members. The drive apparatus is equipped with detecting devices that have mutually different resolutions so as to detect the amount of rotation of each of a plurality of nuts possessed by the ball screw, thereby improving the overall resolution of the apparatus.