Patent ID: 8037986

Claim:
A one-way clutch of roller type comprising: an outer race having pockets provided at their inner peripheries with cam surfaces; an inner race arranged in an inner diameter side of said outer race coaxially; a plurality of rollers disposed in said pockets and adapted to transmit torque between said outer race and said inner race when engaged by said cam surfaces; a holder having a cylindrical portion with windows for holding said rollers and a flange portion extending outwardly from said cylindrical portion in the radial direction and fitted into a stepped portion provided in the inner diameter side of said outer race and rotatable relative to said outer race; springs disposed in said pockets between said outer race and said rollers and having one ends secured to said outer race and adapted to bias said rollers toward engagement directions with respect to said cam surfaces; and a side plate provided at its inner diameter portion with spline grooves and secured to a side surface of said outer race near said stepped portion by means of rivets inserted into a plurality of axial through holes provided in said outer race; and wherein said side plate has through holes through which said rivets extends and foreign matter discharging holes for removing foreign matters out of said clutch.