Patent ID: 8459423

Claim:
A one-way clutch of roller type comprising: an outer race having a plurality of pockets provided at their peripheries with cam surfaces and also having a stepped portion formed on one axial end face of an inner diameter side; an inner race spaced radially inwardly from said outer race and coaxially arranged therewith for relative rotational movement; rollers disposed in said pockets and adapted to transmit torque between the outer race and the inner race when engaged by said cam surfaces; a cage having a cylindrical portion with windows and a flange portion extending from said cylindrical portion in a radially outward direction and fitted in said stepped portion of said outer race and rotatable relative to said outer race, each window being adapted to hold a corresponding one of said rollers and having a circumferential window width smaller than a diameter of the corresponding roller; and springs disposed in said pockets and between said outer race and said rollers and adapted to bias said rollers toward engagement with said cam surfaces; wherein an inclined surface portion inclined along the axial direction is provided on at least a circumferential part of the inner peripheral surface of said outer race, said inclined surface portion inclining in such a manner that a radial width of a space bounded by said inclined surface portion is increased in a direction from the one axial end face of said outer race toward an opposite axial end face of said outer race, said radial width increasing over a major portion of a length of said space in the axial direction.