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:
Nov. 16, 1999
Filed:
Aug. 13, 1997
Hiroshi Sekine, Takasaki, JP;
Akira Aida, Takasaki, JP;
NSK Ltd., Tokyo, JP;
Abstract
A universal joint comprises a pair of yokes each formed by bending a metal plate, a single piece of cross shaft for connecting the pair of yokes to each other so as to be capable of oscillating and displacing, and a bolt for fixing each of the yokes to an end portion of a shaft. The yoke includes a joint cylindrical portion provided at a proximal end portion thereof and having a discontinuous portion at one place in a circumferential direction, first and second flange portions provided in parallel to each other at a part of the joint cylindrical portion with the discontinuous portion sandwiched in therebetween, a through-hole formed in the first flange portion thereof in such a direction as to bear a torsion positional relationship with the joint cylindrical portion, a screw hole formed in a fixing portion of the second flange portion and disposed concentrically to the through-hole. The bolt has a large-diameter head portion formed at one end of a bar portion and a male screw portion formed similarly at the other end thereof, and is fastened in such as state that the bar portion is inserted into the through-hole from a side opposite to the screw hole, the male screw portion is screwed into the screw hole, and a one-side surface of the head portion is brought into contact with a one-side surface of the first flange portion, thereby pressing an outer peripheral surface of the shaft inserted into the joint cylindrical portion without a large gap and fixing the yoke to the shaft. A length from the one-side surface to an opening edge of the screw hole is set more than 2.6 times as large as a nominal diameter of the bolt.