Patent ID: 9556900
Date: 2017-01-31
CPC Classifications: B22D,B22F,F16C,Y10T

Claim:
1. A spherical plain bearing comprising: an inner ring being delineated by an inner ring exterior surface, the inner ring exterior surface comprising an outer spherical contact surface, and an outer ring being delineated by an outer ring exterior surface, the outer ring exterior surface comprising an inner spherical contact surface, wherein the outer spherical contact surface of the inner ring cooperates with the inner spherical contact surface of the outer ring, wherein at least one of the inner ring and the outer ring comprises an internal cavity running therein, the internal cavity being completely enclosed within the at least one of the inner ring and the outer ring such that there are no fluid passages extending between the internal cavity and the inner ring exterior surface or the outer ring exterior surface, and such that the internal cavity is not in fluid communication with a surroundings of the one of the inner ring and the outer ring.