US Patent 9303962 Expanding broadhead

An expanding broadhead preferably includes a shank base, a razor tip, at least one expanding barb unit, a rear retention ring and a front retention ring. An arrow shaft shank extends from one end of the shank base and a tip slot formed in an opposing end to receive the razor tip. Each expanding barb unit preferably includes two barb elements that extend from a base ring. Each barb element preferably includes a lengthwise barb base, a first set of opposing barbs, a second set of opposing barbs and opposing bulges. The two lengthwise barb bases are bent to obtuse angles. The base ring of the expanding barb unit is bent into a substantially semi-circular shape. The rear retention ring is forced over the base ring to retain thereof on the base shank. The front retention ring is stretched and placed over the at least two barb elements.