Patent ID: 6679141
Filing Date: 2004-01-20
Classification: F16D

Abstract:
A torque transfer component comprising a female living portion having a useful height and a transverse cross-section profile, the profile comprising:four inner wall segments disposed on a square which corresponds to a square drive having a dimension selected from the group consisting of 6.35 mm, 9.53 mm, 12.70 mm, 15.88 mm, 19.05 mm, 25.40 mm, 38.10 mm and 63.50 mm; four splines projecting radially outward from respective corner regions of said square, each of said splines being respectively delimited by two lateral edges and an outer edge; rounded portions which join respective said lateral edges to said inner wall segments; and wherein said profile is constant over the entire useful height of the female driving portion such that said lateral edges of said splines comprise driving surfaces in co-operation with substantially conjugated spline surfaces of a correspondingly shaped male torque transfer component when the male transfer component is inserted into said profile, and such that said inner wall segments comprise driving surfaces in co-operation with a square drive when the square drive is inserted into said profile.