Patent ID: 8182187
Filing Date: 2012-05-22
Classification: B25B,F16B,Y10S

Abstract:
1. An article of manufacture for use in a torque transmitting system having a longitudinal axis, said article of manufacture comprising: a drive surface configuration having a side surface and an end surface, said end surface tapers upwardly and outwardly from a lowermost point provided along the longitudinal axis to said side surface, said end surface defining a plurality of identically configured lobes, each said lobe extending from a first point to a second point, said first point of one of said plurality of lobes being said second point of an adjacent one of said plurality of lobes, each of said first and second points of each said lobe being provided along an imaginary circle having its center along the longitudinal axis, said side surface extends upwardly from said end surface defining said plurality of lobes, each of said lobes extends from said first point to said second point by, in series, a first convex edge, a straight edge, first and second concave edges, and a second convex edge, said first and second convex edges each being tangential to said imaginary circle.