US Patent 10337843 Broadhead with rotating blades

A broadhead assembly for use with an arrow shaft includes a main body, a blade assembly, and an attachment member. The main body has a central axis and a mating surface for coupling to the arrow shaft. The blade assembly rotatably couples to the main body, and is oriented so as to rotate radially to the central axis. The blade assembly has a blade axis of rotation. The attachment member is coupled to the main body and configured to secure the blade assembly in a closed orientation. Rotation of the blades within the blade assembly is such that they rotate about the blade axis and the blade axis is parallel to the central axis.