US Patent 9239216 Arrowhead

An arrowhead having a tip end, a shaft end, and a longitudinal axis intersecting the tip end and the shaft end. The arrowhead has a first portion longitudinally positioned between the tip end and the shaft end and having a first maximum diameter. The first portion is divided into a plurality of sections spaced circumferentially apart to define longitudinal grooves. Each section comprises a first planar surface, a second planar surface not parallel to the first planar surface, a concave surface adjacent to the first planar surface, the second planar surface, the rear end portion, and the front intermediate section. A longitudinally-convex surface is adjacent to the concave surface.