Drive system with full surface drive contact
AssigneeAcument Intellectal Properties, LLC
InventorDavid C. Goss
Life of this patent
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Abstract
A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure.
Claims7
A bit or punch having a center and comprising a drive surface, said drive surface extending from an inner to an outer diameter formed of polygon involutes comprising a plurality of continuous tangent arcs, wherein each arc has a radius within the bit, wherein each arc is convex relative to the center of the bit, wherein each radius is constant but different, and wherein each radius has a center located on locus points of a radius at the center of the bit or punch.
Dependencies are inferred from the claim text.