Patent ID: 7484606
Filing Date: 2009-02-03
Classification: F16D

Abstract:
1. A one-way sprag clutch comprising an inner race having an outer peripheral surface and an outer race having an inner peripheral surface radially spaced apart from the outer peripheral surface, said surfaces being concentrically disposed for rotation relative to one another, and a sprag disposed to extend between said surfaces for transmitting torque therebetween, wherein a cam surface of said sprag which contacts with the outer peripheral surface of said inner race is formed with means comprising a plurality of axial grooves extending over the entire axial width of said sprag for eliminating an oil film between said sprag and said inner race, and wherein the depth of said grooves is between about 0.005 mm and about 0.05 mm, and said plurality of grooves are formed axially substantially in parallelism to each other, and the pitch between adjacent ones of said grooves is about 0.5 mm.