Patent ID: 8376648
Filing Date: 2013-02-19
Classification: F16C,Y10T

Abstract:
1. A rotational bearing assembly comprising: a pivot pin having a threaded hole extending axially therethrough; a rotation member having an upper and lower surface, and an aperture extending from the upper surface to the lower surface within which the pivot pin is located such that the rotation member can rotate relative to the pivot pin; an annular bearing comprising an inner bearing surface slidably engaged with an outer surface of the pivot pin, and an outer bearing surface fixedly engaged with the aperture of the rotation member, the annular bearing having: an axial portion which extends axially within the aperture of the rotation member and at least partly over the outer surface of the pivot pin, and first and second flanges at opposite ends of the axial portion, wherein the first and second flanges each include opposed inner and outer annular surfaces, wherein the inner annular surface of the first flange extends at least partly over the upper surface of the rotation member, and the inner annular surface of the second flange extends at least partially over the lower surface of the rotation member; wherein the axial portion of the annular bearing is divided into two distinct bearing members spaced axially on the outer surface of the pivot pin; wherein a bolt having a head and a threaded shaft is threadably engaged with the threaded hole in the pivot pin, and the head of the bolt comprises a shoulder defining an inner surface and extending partially over the outer annular surface of one of the flanges; and wherein a washer is disposed between the inner surface of the shoulder of the bolt and the outer annular surface of the one of the flanges such that, when assembled, a gap between the outer annular surface of the one of the flanges and the shoulder of the bolt is filled by the washer.