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:
Dec. 06, 1994
Filed:
Oct. 13, 1993
Masayuki Katahira, Gunma, JP;
NSK Ltd., Tokyo, JP;
Abstract
It is an object of the invention to provide a movable member feed device which is able to set or control the position of an intermediate support so that it can increase the natural vibration frequency of a feed screw shaft effectively to thereby reduce the vibration of the feed screw shaft. The movable member feed device according to the present invention includes an intermediate support frame supported by a linear movement bearing fitted with a guide rail and free to move in the axial direction thereof, an intermediate support nut threadedly engaged with a feed screw shaft through a ball and supported by the intermediate support frame in such a manner that it is prevented from moving in the axial direction thereof with respect to the intermediate support frame but is free to rotate, an auxiliary feed screw having an axis parallel to a feed screw shaft an intermediate support feed nut threadedly engaged with an auxiliary feed screw and fixed to the intermediate support frame, and auxiliary feed screw drive means which moves the intermediate support frame according to the rotation of the feed screw shaft.