Patent ID: 9556907
Date: 2017-01-31
CPC Classifications: B29C,B29L,F16C

Claim:
1. A retainer for a tapered roller bearing comprising a small annular section, a large annular section, and retainer bar sections, wherein the small annular section, the large annular section and all of the retainer bar sections are integrally injection molded; wherein gates are arranged at sites of the large annular section uniformly spaced apart from each other in a circumferential direction and positioned on extensions of circumferential center lines of respective pockets; wherein weld lines are generated only in the small annular section; wherein the small annular section includes projections with which an inside diameter dimension is circumferentially intermittently reduced from a maximum inside diameter portion of the small annular section; and wherein the weld lines traverse the small annular section through the respective projections.