US2008287228A1PendingUtilityA1

Single wall ball bat including e-glass structural fiber

51
Individually held — no corporate assignee on recordPriority: May 16, 2007Filed: May 16, 2007Published: Nov 20, 2008
Est. expiryMay 16, 2027(~0.8 yrs left)· nominal 20-yr term from priority
Inventors:William B. Giannetti
A63B 2102/18A63B 2209/023A63B 59/50A63B 59/54A63B 2102/182
51
PatentIndex Score
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Claims

Abstract

A single-wall ball bat is made up of a series of layers or plies of unidirectional, two-dimensional, structural fibers. The plies are optionally layered upon each other in a lamina structure in which the fibers in one ply are oriented at opposing angles to the fibers in one or more neighboring plies. Low tensile modulus, two-dimensional E-glass fibers, oriented to provide desired durability, may be used to construct a substantial portion of the barrel or other regions of the ball bat.

Claims

exact text as granted — not AI-modified
1 . A ball bat, comprising:
 a handle;   a single-wall barrel comprising a plurality of layers of unidirectional, two-dimensional fibers, with the layers laid upon one another such that the fibers in a given layer are oriented at opposing angles to the fibers in at least one neighboring layer, and wherein the barrel does not include three-dimensional fibers;   wherein at least 50% of the fibers comprise E-glass fibers oriented +/−60° or greater relative to a longitudinal axis of the ball bat; and   a transition region joining the handle to the barrel.   
     
     
         2 . The ball bat of  claim 1  wherein 50-60% of the fibers comprise E-glass fibers oriented at +/−60° or greater relative to a longitudinal axis of the ball bat. 
     
     
         3 . The ball bat of  claim 1  wherein 60-70% of the fibers comprise E-glass fibers oriented at +/−60° or greater relative to a longitudinal axis of the ball bat. 
     
     
         4 . The ball bat of  claim 1  wherein 70-80% of the fibers comprise E-glass fibers oriented at +/−60° or greater relative to a longitudinal axis of the ball bat. 
     
     
         5 . The ball bat of  claim 1  wherein 80-90% of the fibers comprise E-glass fibers oriented at +/−60° or greater relative to a longitudinal axis of the ball bat. 
     
     
         6 . The ball bat of  claim 1  wherein 90-100% of the fibers comprise E-glass fibers oriented at +/−60° or greater relative to a longitudinal axis of the ball bat. 
     
     
         7 . The ball bat of  claim 1  wherein the fibers are embedded in a resin matrix comprising at least one of epoxy, vinyl ester, polyester, urethane, and nylon. 
     
     
         8 . The ball bat of  claim 1  wherein the plurality of layers are laid up in a plurality of corresponding lamina pairs, wherein each lamina pair includes a first layer of fibers oriented at a positive angle relative to a longitudinal axis of the ball bat, and a second layer of fibers oriented at a negative angle relative to a longitudinal axis of the ball bat. 
     
     
         9 . The ball bat of  claim 8  wherein, within each lamina pair, the positive angle is equal to or substantially equal to the absolute value of the negative angle. 
     
     
         10 . The ball bat of  claim 8  wherein the fibers in at least 50% of the lamina pairs have the same angular orientations as one another. 
     
     
         11 . The ball bat of  claim 1  wherein the fibers in the barrel comprise 50-90% E-glass fibers and 10-50% graphite fibers. 
     
     
         12 . A ball bat, comprising:
 a handle;   a single-wall barrel comprising a plurality of layers of unidirectional, two-dimensional fibers, wherein at least 50% of the fibers comprise E-glass fibers oriented +/−60° or greater relative to a longitudinal axis of the ball bat, and wherein the barrel does not include three-dimensional fibers; and   a transition region joining the handle to the barrel;   wherein the layers are arranged in a plurality of corresponding lamina pairs, with each lamina pair including a first layer including fibers oriented at a positive angle relative to a longitudinal axis of the ball bat, and a second layer including fibers oriented at a negative angle relative to a longitudinal axis of the ball bat.   
     
     
         13 . The ball bat of  claim 12  wherein, within each lamina pair, the positive angle is equal to or substantially equal to the absolute value of the negative angle. 
     
     
         14 . The ball bat of  claim 12  wherein the fibers in at least 50% of the lamina pairs have the same angular orientations as one another. 
     
     
         15 . The ball bat of  claim 12  wherein the fibers are embedded in a resin matrix comprising at least one of epoxy, vinyl ester, polyester, urethane, and nylon. 
     
     
         16 . The ball bat of  claim 11  wherein the fibers in the barrel comprise 50-90% E-glass fibers and 10-50% graphite fibers. 
     
     
         17 . A ball bat, comprising:
 a handle;   a single-wall barrel comprising a plurality of layers of unidirectional, two-dimensional fibers, with the layers laid upon one another such that the fibers in a given layer are oriented at opposing angles to the fibers in at least one neighboring layer, wherein the fibers comprise 50-90% E-glass fibers oriented +/−60° or greater relative to a longitudinal axis of the ball bat and 10-50% graphite fibers, and wherein the barrel does not include three-dimensional fibers; and   a transition region joining the handle to the barrel.   
     
     
         18 . The ball bat of  claim 17  wherein the layers are arranged in a plurality of corresponding lamina pairs, with each lamina pair including a first layer including fibers oriented at a positive angle relative to a longitudinal axis of the ball bat, and a second layer including fibers oriented at a negative angle relative to a longitudinal axis of the ball bat. 
     
     
         19 . The ball bat of  claim 18  wherein, within each lamina pair, the positive angle is equal to or substantially equal to the absolute value of the negative angle. 
     
     
         20 . The ball bat of  claim 18  wherein the fibers in at least 50% of the lamina pairs have the same angular orientations as one another

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