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. 28, 2002
Filed:
Jul. 31, 2001
Toru Tsukada, Gunma, JP;
Shiroji Yabe, Gunma, JP;
Nobuyuki Osawa, Gunma, JP;
Kenjiro Shiki, Gunma, JP;
NSK Ltd., Tokyo, JP;
Abstract
Three rows of ball rolling grooves A to C are formed in each side of a guide rail while being vertically arrayed. Three rows of ball rolling grooves A to C are also formed on the inner surface of each of the legs of a slider The ball rolling grooves A to C are respectively disposed in opposition to the ball rolling grooves A to C to thereby form ball sliding passages A to C. In either of the upper or lower ball rolling passage A or C, each ball contacts, at four points, with the surfaces of the ball rolling groove A or C of the guide rail and the ball rolling groove A or C of the slider In the remaining ball rolling passages, each ball contacts at two points with the surfaces of the ball rolling grooves. One of lines L and L each of which connects two opposite contact points of those four ones in the upper or lower ball rolling passage is oriented in the same direction as of lines L and L connecting the contact points in the remaining ball rolling passages. With such a construction, the upper, medium and lower rows of ball trains receive all loads acting on the slider in share, whereby the linear guide assembly exhibits its maximum load capacity against the loads.