Patent ID: 9651088
Date: 2017-05-16
CPC Classifications: A47B,B29C,B29L,F16C

Claim:
1. A ball retainer comprising: a body section formed in a central portion in a longitudinal direction; and a pair of retaining sections formed on both ends of the body section, each of the retaining sections having a plurality of ball accommodation recesses in which balls are accommodated, the ball accommodation recesses being spaced apart in the longitudinal direction, wherein the body section and the pair of retaining sections are defined by a first extension and a second extension extending from a centerline in transverse directions to the centerline extending in the longitudinal direction, the first extension and the second extension forming a predetermined angle therebetween; and wherein each of the first extension and the second extension has expanded sections on both sides thereof in the longitudinal direction, a cross-sectional area of each of the expanded sections being greater than a cross-sectional area of a corresponding one of the first extension and the second extension, and a cross-sectional shape of each of the expanded sections is the same as a cross-sectional shape of the balls.