Patent ID: 9279457
Filing Date: 2016-03-08
CPC Classification: F16B,F16D,F24S,H02S,Y02E

Claim Text:
1. A torque transmission member comprising: a rotatable shaft extending along a longitudinal axis and having a first radius of curvature of an outer surface thereof; a mounting portion fixed to an end of the rotatable shaft and configured for transmission of rotational force around the longitudinal axis of the rotatable shaft; at least six lobes extending radially outwardly away from the mounting portion and away from a central axis of the torque transmission member, the plurality of lobes being distributed around the circumferentially extending portion, each of the lobes having a hole; and at least six concave portions disposed between respective adjacent pairs of lobes; wherein each of the at least six concave portions comprises a concave surface facing outwardly away from the central axis, the concave surface having a second radius of curvature, wherein the second radius of curvature is approximately the same as the first radius of curvature.