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US 6,139,451 AGranted
Reinforced wood bat
AssigneeHillerich & Bradsby Co.
InventorsJohn A. Hillerich, III, George W. Burger
Life of this patent
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AssigneeHillerich & Bradsby Co.
InventorsJohn A. Hillerich, III, George W. Burger
Estimating the term…
A reinforced wood bat has a solid wood core with the same as standard wood bats but with slightly smaller dimensions. The barrel may include a plurality of grooves in the hitting zone. One or more continuous, uninterrupted layers of a conformable fabric sleeve, constructed of high strength fibers, snugly fitting over substantially the entire outer surface of the core forms a preformed bat assembly. The fabric sleeve is dimensioned to expand slightly over the barrel of the core and compress over the handle of the core. A fiberglass braided sleeve, with strands initially aligned at about +45.degree./-45.degree. orientation, is preferred. When the braided sleeve strands are tensioned over the handle portion, they align more longitudinally, and tend to lock, which significantly increases the reinforcing strength in the handle portion of the bat. An epoxy resin, which self-cures at or near room temperature, laminates and bonds the sleeve layers to the wood core to the full size dimension specified for wood bats. The preferred braided sleeve can be applied to the wood core using a hollow application tube, which applies the sleeve to the wood core in double layers, while at the same time aligning the fabric strands in the desired orientations. A molding technique heat shrinks conventional high shrink plastic tubing into close fitting contact with the preformed bat assembly. The shrunk tubing then serves as the mold for laminating and bonding the fabric sleeve layers to the core with the curable resin.
A reinforced wood bat having external dimensions of a standard size wood bat which comprises a wood core including a handle portion and a barrel portion defining an elongated member having external dimensions slightly less than the external dimensions of a standard size wood bat and one or more continuous layers of a sleeve of reinforcing fibers impregnated with a curable resin laminated to and covering a substantial portion of an external surface of said wood core, said one or more layers having a thickness to increase the external dimensions of the wood core to final dimensions of the reinforced wood bat substantially identical to the external dimensions of said standard size wood bat, said handle portion of the wood core includes a plurality of longitudinally extending grooves symmetrically spaced about the handle portion of the bat.
A reinforced wood bat having external dimensions of a standard size wood bat which comprises a wood core including a handle portion and a barrel portion defining an elongated member having external dimensions slightly less than the external dimensions of a standard size wood bat and one or more continuous layers of a sleeve of reinforcing fibers, a major portion of said fibers being constructed of glass fibers impregnated with a curable resin laminated to and covering a substantial portion of a external surface of said wood core, said one or more layers having a thickness to increase the external dimensions of the wood core to final dimensions of the wood bat substantially identical to the external dimensions of said standard size wood bat, said sleeve being present in two continuous layers each covering substantially the entire external surface of the wood core, wherein said two continuous layers are also continuous with respect to each other with the outer layer doubled back over the inner layer.
A reinforced wood bat, having external dimensions of a standard size wood bat which comprises a wood core including a handle portion and a barrel portion defining an elongated member having external dimensions slightly less than the external dimensions of a standard size wood bat and one or more continuous layers of a sleeve of reinforcing fibers impregnated with a curable resin laminated to and covering a substantial portion of a external surface of said wood core, said one or more layers having a thickness to increase the external dimensions of the wood core to final dimensions of the reinforced wood bat substantially identical to the external dimensions of said standard size wood bat where said bat includes a plurality of circular grooves in said barrel end.
A reinforced wood bat having external dimensions of a standard size wood bat which comprises a solid wood core including a handle portion and a barrel portion defining an elongated solid wood member having external dimensions slightly less than the external dimensions of a standard size wood bat and one or more continuous layers of a sleeve of strands of reinforcing fibers impregnated with a curable resin laminated to and covering substantially an entire external surface of said wood core, said one or more layers having a thickness to increase the external dimensions of the wood core to final dimensions of the reinforced wood bat substantially identical to the external dimensions of said standard size wood bat, wherein said fiber strands are oriented in the barrel portion of said bat about +45.degree./-45.degree. and said fiber strands are oriented in the handle portion of said bat at substantially below +45.degree./-45.degree., and wherein the handle portion of the wood core includes a plurality of longitudinally extending grooves symmetrically spaced about the handle portion of the bat.
Dependencies are inferred from the claim text.