Double-Barrel Bat Insert Limits Radial Deflection
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Solution Overview
Problem
Existing double-barrel bats face challenges in achieving high compliance and durability while meeting league or association rules, such as BBCOR and BBS regulations, and often result in heavier weights that are undesirable for smaller or younger players due to unnecessary weight distribution.
Innovation Solution
A double-barrel ball bat design featuring an outer shell and an insert with a tube element and spacer elements forming a gap, where the insert extends only along the ball striking area to provide compliance and limit radial deflection, allowing for a trampoline effect and reduced weight by minimizing the length of the insert.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the outer barrel tube extends beyond the hitting area to provide a traditional look or feel, then the aesthetic appearance and traditional feel are improved, but the weight increases unnecessarily
Solution Approach 1:
The bat is divided into functional segments: the outer barrel tube is segmented to extend only through the hitting area, while separate handle components provide the traditional elongated appearance. This segmentation allows each component to be optimized independently for its specific function, eliminating unnecessary weight in non-hitting portions.
Solution Approach 2:
Different portions of the bat are given different properties: the hitting area features the extended outer barrel tube for traditional appearance and optimal performance, while the handle area uses a different construction that is lighter and better suited for its function. This local differentiation allows the bat to have traditional aesthetics where needed without the associated weight penalty throughout the entire structure.
2Stability of the object's composition
If the outer barrel tube extends beyond the hitting area to avoid discontinuity, then the structural continuity is improved, but the weight increases unnecessarily
Solution Approach 1:
The structural continuity function is segmented to apply only where necessary: the outer barrel tube provides continuous structure through the hitting area, while the handle uses a separate continuous construction. This segmented approach to continuity eliminates the need for extended tube length in the handle area, reducing weight while maintaining structural integrity in both regions.
Solution Approach 2:
The requirement for structural continuity is extracted from the entire bat length and applied only to the hitting area where it is functionally necessary. The handle area uses a different construction method that achieves continuity through its own design, allowing the outer barrel tube to be shortened and weight to be reduced.
3Reliability
If the insert extends beyond the ball striking area to maintain structural integrity, then the durability is improved, but the weight increases and compliance may be compromised
Solution Approach 1:
The insert is segmented to extend only through the ball striking area, with separate structural reinforcement elements in the handle and connection areas. This segmentation allows the insert to provide durability where ball impact occurs without adding unnecessary weight in non-hitting portions, while still meeting BBCOR and BBS compliance requirements.
Solution Approach 2:
The insert is given different lengths and properties in different portions of the bat: it extends through the ball striking area to provide durability and performance, while the handle and connection areas use different construction methods. This local differentiation optimizes durability where needed while minimizing weight and ensuring compliance in other areas.
4Productivity
If the outer shell is made more compliant to create trampoline effect, then the hitting performance is improved, but the radial deflection control becomes difficult and durability decreases
Solution Approach 1:
The bat structure is segmented into the outer shell that provides compliance for trampoline effect and the inner insert that provides structural support. This segmentation allows the outer shell to be highly compliant for improved hitting performance while the inner insert maintains structural integrity and durability, resolving the contradiction between compliance and durability.
Solution Approach 2:
The bat uses a composite construction with an outer shell made of compliant material for trampoline effect and an inner insert made of more rigid material for structural support. This composite approach allows both high compliance for performance and sufficient durability to be achieved simultaneously through the combination of different materials with complementary properties.
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 design enhances hitting feel and sound, reduces shock and vibration, and achieves weight savings of 0.5 to 4.0 ounces by limiting the insert's length, maintaining compliance with performance regulations and providing improved player comfort.
Implementation Method 1
The outer shell may provide some compliance during a hit to create a trampoline effect
Implementation Method 2
The outer shell may provide some compliance during a hit to create a trampoline effect
Implementation Method 3
the insert may provide a backstop to limit radial deflection of the outer shell
Implementation Method 4
The outer shell may provide some compliance during a hit
Implementation Method 5
reduces shock and vibration
Implementation Method 6
reduces shock and vibration
Data Source
AI summary
A ball bat includes an outer shell and an insert positioned in a ball striking area of the outer shell. The insert may include a tube element and one or more spacer elements positioned to form a gap between the tube element and the outer shell along at least a portion of a length of the tube element. In some embodiments, the insert or the gap may extend along only the length of the ball striking area. The outer shell may provide some compliance during a hit to create a trampoline effect, while the insert may provide a backstop to limit radial deflection of the outer shell.