Patent ID: 6352371
Filing Date: 2002-03-05
Classification: F16C

Abstract:
A ball bearing having an inner race, an outer race, a plurality of balls, and a synthetic resin crown shaped retainer, the synthetic resin crown shaped retainer having an annulus, the annulus having a plurality of pockets made up of recesses that are formed at circumferentially spaced intervals on one of annular faces, respectively pairs of pawls provided at both ends of the pockets and axially projecting from one of the annular faces of the annulus so as to prevent the ball from dropping out a pocket, and a plurality of plane surfaces, which are greased between the respective pairs of pawls, said retainer including:said pairs of pawls which comprise first pairs of pawls and second pairs of pawls that are circumferentially provided on one of the annular faces of said annulus in alternate arrangement, and barriers for preventing grease from scattering out said retainer, the barriers each circumferentially extending from back faces of said respective first pairs of first pawls to back faces of said respective second pairs of pawls, and each having a cut away portion at a contact with said second pair of pawls, said pockets being alternately first pockets each having said first pairs of pawl and second pockets each having said second pairs of pawl.