Titanium Cam String Stop Weight Reduction
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Solution Overview
Problem
Existing archery bow cam string stops are not lightweight or strong enough to efficiently transfer kinetic energy to arrows, limiting arrow speed and efficiency.
Innovation Solution
A titanium cam string stop with a female thread, counter bore, and parallel flats for tool access, combined with a resilient impact portion like o-rings, providing a strong and lightweight design that enhances arrow propulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional materials are used for the cam string stop, then the structure is sufficient for basic function, but the weight is excessive and strength is insufficient for efficient kinetic energy transfer
Solution Approach 1:
The patent changes the material parameter from traditional metals to titanium, which has a higher strength-to-weight ratio. This parameter change resolves the contradiction by providing both increased strength for kinetic energy transfer and reduced weight for easier bow handling.
Solution Approach 2:
The patent employs titanium as a composite material solution that combines the desirable properties of light weight and high strength. The titanium construction with strategic material distribution (solid sections where strength is needed, hollow/cOUNTERBORED sections where weight reduction is prioritized) resolves the contradiction between strength and weight.
2Ease of operation
If the cam string stop is made lighter, then ease of use improves, but kinetic energy transfer efficiency may deteriorate
Solution Approach 1:
By changing the material parameter to titanium with optimized wall thicknesses and strategic hollow sections, the patent achieves both reduced weight for ease of operation and sufficient mass in critical areas for effective kinetic energy transfer to the arrow.
Solution Approach 2:
The patent applies local quality by varying the material distribution within the cam string stop - solid sections at mounting interfaces for structural integrity, and hollow/COUNTERBORED sections in non-critical areas for weight reduction. This localized material optimization resolves the contradiction between overall weight reduction and localized energy transfer efficiency.
Data Source
AI summary
An archery bow cam string stop includes a titanium stop, a titanium fastener and an impact portion. The titanium stop includes an elongated body. A female thread is tapped in one end of the titanium stop and a counter bore is formed in an opposing end thereof. The counter bore reduces the weight of the titanium stop. Two parallel flats are formed on opposing sides of the elongated body, adjacent the female thread to receive an open-end wrench. A cross-sectional shape of the elongated body is preferably round. The impact portion is preferably a plurality of o-rings. The plurality of o-rings are slid over an outer perimeter of the elongated body. In use, a threaded end of the titanium fastener is inserted through a stop slot in the string cam. The threaded end is threaded into the female thread and tightened to retain the titanium in position.