Archery Bow Stabilizer with Alternating Stiffness Layers
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Solution Overview
Problem
Existing bow stabilizers are limited in their ability to dampen vibrations, as their core materials, such as laminated carbon prepreg or composite materials, do not effectively absorb and dissipate shock and movement when the bow is shot.
Innovation Solution
The stabilizer features an elongated tube constructed with alternating layers of materials, where natural fiber materials like flax with lower stiffness are combined with higher stiffness materials like carbon fiber, creating a multi-layer structure that enhances vibration reduction by alternating degrees of stiffness from the core to the exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional core materials (laminated carbon prepreg, fiberglass, aluminum tubing) are used in stabilizers, then the stabilizer provides structural support and shock resistance, but the vibration damping ability is limited
Solution Approach 1:
The patent applies composite materials by combining multiple materials with different damping characteristics (carbon fiber, fiberglass, flax fiber, aluminum) into a layered core structure. Each material layer contributes its unique vibration damping properties, and the combination creates a synergistic effect that exceeds the performance of individual materials. The composite structure allows optimization of both structural support and vibration damping through material selection and layer arrangement.
Solution Approach 2:
The core is segmented into multiple layers, each made of different materials with specific damping characteristics. The core comprises a first layer of carbon fiber, a second layer of fiberglass, a third layer of flax fiber, and a fourth layer of aluminum, arranged in sequence. This segmentation allows each layer to address specific vibration frequencies and modes, providing comprehensive vibration damping across a broad spectrum while maintaining structural integrity.
2Object-affected harmful factors
If a single-layer core structure is used, then manufacturing is simple, but vibration damping across different frequencies is insufficient
Solution Approach 1:
The patent employs composite materials with distinct damping characteristics arranged in layered fashion. Carbon fiber provides high stiffness and dampens high-frequency vibrations, fiberglass offers mid-range damping, flax fiber contributes to low-frequency vibration absorption, and aluminum adds structural strength and damping. This composite approach enables effective damping across multiple frequency ranges simultaneously.
Solution Approach 2:
Different layers of the core are assigned different material qualities tailored to specific damping needs. The carbon fiber layer addresses high-frequency vibrations, fiberglass handles mid-range frequencies, flax fiber targets low-frequency vibrations, and aluminum provides overall structural support. This local differentiation of material properties optimizes vibration damping performance across the entire frequency spectrum.
3Strength
If dense fabric cover material is used throughout, then structural stiffness is improved, but shock absorption in flexible sections is reduced
Solution Approach 1:
The cover material is differentiated by section: the first cover section uses a first fabric material optimized for shock absorption in the flexible first portion, while the second cover section uses a second fabric material with different properties suited for the stiffer second portion. This local quality variation ensures each section's cover material complements the core material and structural requirements of that specific region, optimizing both shock absorption and structural stiffness where needed.
Solution Approach 2:
The patent changes the fabric material parameter along the length of the stabilizer to match the varying structural requirements. The first portion, which needs flexibility and shock absorption, is covered with a fabric material that allows controlled flexing. The second portion, requiring higher stiffness, is covered with a different fabric material that provides enhanced structural support. This parameter variation optimizes performance across different sections.
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
This multi-layer structure significantly improves the damping ability of the stabilizer, providing enhanced vibration reduction and shock absorption, thereby improving the archer's accuracy and comfort during shooting.
Implementation Method 1
The stabilizer resists torque and absorbs vibrations in the bow when shot, thereby reducing the shock felt in the archer's hand on the bow grip
Implementation Method 2
The first portion is adapted to flex in order to absorb shock when the bow is shot
Data Source
AI summary
An archery bow stabilizer includes an elongated tube formed of at least two concentric layers of alternating stiffness or rigidity. The layers are formed of different materials, one have a low degree of stiffness and the other having a higher degree of stiffness relative to the material of low stiffness. The low stiffness material is a natural fiber material and the high stiffness material is a metal or composite material.