Patent ID: 7775720

Claim:
A bearing assembly, comprising: a bearing member comprising an inner surface defining an axial central hole therein, the inner surface of the bearing member comprising a top portion at a top end of the bearing member, a bottom portion at a bottom end of the bearing member, and a middle portion larger than both the top portion and the bottom portion in diameter, a first chamfer angle being formed between the top portion and a top end of the middle portion, and a second chamfer angle being formed between the bottom portion and a bottom end of the middle portion, the diameter of the middle portion decreasing downwardly from the first chamfer angle to the second chamfer angle; and a rotatable member received in the central hole and rotatably supported by the top portion and the bottom portion of the inner surface of the bearing member, a wedge-shaped gap being formed between the rotatable member and the middle portion of the inner surface of the bearing member, whereby lubricant can be more easily retained between the rotatable member and the bearing member.