Multi-Damping Baseball Bat Vibration Isolation
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Solution Overview
Problem
Conventional baseball and softball bats fail to effectively absorb shock and limit vibration transmission to the user's hands without compromising energy transfer to the ball, as they often rely on single-mode vibration isolation methods that result in energy losses and discomfort, particularly for children and aged users.
Innovation Solution
A bat design featuring a handle and barrel configuration with multiple damping sections, including a first damping section with a Shore hardness of 70A to 100A and a second damping section with a Shore hardness of 20A to 40A, strategically positioned to absorb vibrations across different flexural bending modes, preventing direct contact between the handle and barrel to minimize vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single vibration isolator is used to dampen vibration, then vibration transmission is reduced for one bending mode, but vibration transmission remains high for other bending modes
Solution Approach 1:
The vibration isolation system is segmented into multiple independent damping sections positioned at different locations along the bat. Each damping section targets specific bending modes through its position and material properties, allowing simultaneous dampening of multiple vibration modes without compromising energy transfer.
Solution Approach 2:
Different damping sections use materials with different Shore hardness values (70A-100A for first damping section, 20A-40A for second damping section) positioned at specific locations to target different vibration modes. This local differentiation of material properties enables selective vibration dampening for each bending mode.
2Object-affected harmful factors
If high damping materials are used to absorb shock, then vibration transmission at frequencies below natural frequency is limited, but vibration above natural frequency increases
Solution Approach 1:
The patent changes the material parameter (Shore hardness) of the damping sections to optimize vibration dampening. By selecting specific hardness ranges (70A-100A and 20A-40A), the system achieves effective vibration absorption while minimizing energy loss, as each material hardness level is optimized for its specific damping function.
Solution Approach 2:
The bat employs composite damping sections with different material properties (different Shore hardness values) positioned at different locations. This composite approach allows the system to achieve both vibration absorption and energy retention by combining materials with complementary damping characteristics.
3Object-affected harmful factors
If damping sections are added to reduce vibration, then vibration transmission to user's hands is reduced, but device complexity increases
Solution Approach 1:
The damping sections are nested within the hollow portion of the bat barrel, with the handle inserted through the damping sections into the barrel. This nested configuration allows multiple damping sections to be integrated into the existing bat structure without adding external complexity, maintaining a clean and simple overall design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bat effectively reduces vibration transmission to the user's hands while maintaining energy transfer to the ball, providing improved comfort and performance by addressing both vibration reduction and energy retention across various impact zones.
Implementation Method 1
A bat design featuring a handle and barrel configuration with multiple damping sections, including a first damping section with a Shore hardness of 70A to 100A and a second damping section with a Shore hardness of 20A to 40A, strategically positioned to absorb vibrations across different flexural bending modes
Data Source
AI summary
A softball or baseball bat is provided. The bat can comprise a handle that has a proximate end and a distal end and a barrel that has a hollow portion. The bat can comprise first damping section that comprises a first material, and the first damping section can be at least partially interposed between a portion of the handle and a portion of an inner wall of the barrel. The bat can comprise a second damping section that can comprise a second material, and the second damping section can be at least partially interposed between a portion of the handle and a portion of the inner wall of the barrel. At least a portion of the first damping section or the second damping section can prevent the handle from directly contacting the barrel when the bat is at rest.