Controlling the stiffness of a hollow metal bat by providing helical internal ribs
OwnerMatthew Fonteinventor
Life of this patent
Estimating the term…
Abstract
A hollow metal bat comprising an elongated tubular structure having a barrel portion, a handle portion and a tapered portion connecting the barrel portion to the handle portion, and further comprising at least one helical internal rib formed along at least a portion of the elongated tubular structure.
Claims17
A hollow metal bat comprising an elongated tubular structure having a barrel portion, a handle portion and a tapered portion connecting the barrel portion to the handle portion, and further comprising at least one helical internal rib formed along at least a portion of the elongated tubular structure.
A method for forming a hollow metal bat, the method comprising:
- positioning a preform on a mandrel, wherein the mandrel comprises at least one helical groove;
- and
- applying compression to the outside diameter of the preform so as to form an elongated tubular structure having a barrel portion, a handle portion and a tapered portion connecting the barrel portion to the handle portion, and further comprising at least one helical internal rib formed along at least a portion of the elongated tubular structure.
Dependencies are inferred from the claim text.