Asymmetrical Barrel Bat Design for Weight and Vibration Control
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Solution Overview
Problem
Current baseball and softball bats face challenges in achieving reduced drop weights and moment of inertia while maintaining compliance with performance limits, leading to increased vibration and potential tampering issues due to asymmetrical performance changes over their lifespan.
Innovation Solution
The design incorporates an asymmetrical barrel composition with a hitting face and a non-hitting face, featuring distinct fiber orientations and materials, along with inserts and characteristic-modifying sheets to manage weight, vibration, and prevent performance enhancements through tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If manufacturers stiffen the barrel by adding stiffeners or increasing wall thickness to comply with performance rules, then the barrel stiffness increases, but the bat weight and moment of inertia increase, negatively impacting player performance
Solution Approach 1:
The patent applies different material properties to different regions of the barrel. The hitting face area uses a composite material with higher stiffness to meet performance requirements, while the non-hitting face areas use lighter materials. This localized differentiation allows the barrel to be stiff where needed for compliance while minimizing overall weight and moment of inertia to improve player performance.
2Strength
If manufacturers orient fibers circumferentially to increase barrel stiffness for rule compliance, then the barrel stiffness increases, but the vibration felt by the player's hands increases, causing discomfort
Solution Approach 1:
The patent employs different fiber orientations in different barrel regions. In the hitting face area, fibers are oriented to provide necessary stiffness for performance compliance. In the non-hitting face areas, fibers are oriented to minimize vibration transmission to the player's hands. This spatial variation in material anisotropy allows simultaneous optimization of stiffness and vibration reduction.
Solution Approach 2:
The patent uses composite materials with tailored fiber orientations and material compositions in different barrel regions. By combining materials with different damping characteristics and fiber alignments, the design achieves both the required barrel stiffness for rule compliance and reduced vibration transmission to improve player comfort.
3Device complexity
If the barrel composition is made symmetrical about the longitudinal axis, then the construction is simpler, but the bat is vulnerable to tampering and performance can exceed allowable limits over time
Solution Approach 1:
The patent introduces asymmetry in the barrel composition by using different materials or material configurations on the hitting face versus the non-hitting faces. This asymmetric design creates an inherent anti-tampering mechanism because any attempt to modify the barrel (such as rolling or shaving) would create detectable imbalances in weight distribution or structural integrity, thereby preventing performance enhancement through tampering while maintaining construction feasibility.
Data Source
AI summary
Embodiments are directed toward a bat, such as a softball or baseball bat, that includes a handle and a barrel. The barrel is preferably coupled to the handle. The barrel preferably defines a longitudinal axis. The barrel preferably has asymmetrical composition or construction about the longitudinal axis of the barrel.