Patent ID: 8393453

Claim:
A one-way clutch comprising: an outer race having at least one pocket provided at its inner periphery with a cam surface and having a stepped portion formed on an inner diameter side of an axial one end face of said outer race; an inner race spaced apart from said outer race radially inside of said outer race and coaxially arranged for a relative rotational movement; a roller disposed in said pocket and adapted to transmit torque between said outer race and said inner race when engaged by said cam surface; a cage rotatable relative to said outer race and having a cylindrical portion, a flange portion fitted in said stepped portion and extending outwardly from said cylindrical portion in the outer diameter direction and a window formed in said cylindrical portion and having a circumferential width smaller than a diameter of said roller and adapted to hold said roller; and a spring disposed in said pocket and adapted to bias said roller toward an engagement direction with respect to said cam surface; wherein a cover portion covering at least a part of said pocket is provided on the other axial end face of said outer race, said cover portion being formed integrally with said outer race and extending along a spring mounting side of said pocket in a circumferential direction of said pocket.