Patent ID: 7905802

Claim:
An expanding, exposed-blade arrow head comprising: a ferrule comprising a plurality of blade holders on its outer surface, each of said blade holders having a longitudinal channel, each of said longitudinal channels having a camming surface, said ferrule having a longitudinal cavity therein, said longitudinal cavity having a bottom end and a top end; a spring that is mounted in the bottom end of said longitudinal cavity; a tip having a piston that is slidably mounted in the top end of said longitudinal cavity, said tip having a plurality of tip grooves; a plurality of blades, each of said blades comprising a blade forward end, a blade body having a blade slot and a blade cutting edge, each of said blade forward ends being pivotably mounted in one of said tip grooves, and each of said blade bodies being slidably mounted in one of said longitudinal channels; a plurality of first fasteners, each first fastener securing one of the blade forward ends in one of said tip grooves; and a plurality of second fasteners, each second fastener securing one of said blade bodies in one of said longitudinal channels; wherein said tip is operative to move downward in said longitudinal cavity when said arrow head hits a target, said downward movement causing each of said blade cutting edges to move outward.