US Patent 9062944 Broadhead arrowhead

A broadhead arrowhead has a cylindrical central body having a longitudinal axis and a plurality of wing blades that extend radially from the central body. Each wing blade includes a generally triangular surface including a leading edge, a trailing edge and a root edge along the central body. A foil portion is formed in each wing blade and defined by a line extending from a forward point where the wing blade meets the central body at the root edge to the trailing edge. The leading edge is sharpened and each wing blade is oriented in the same circumferential direction with respect to the central body.