Compound Bow Draw Stop with Multiple Radii
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Solution Overview
Problem
Existing draw stops for compound bows limit draw length adjustments to half-inch increments, requiring multiple stops, precise alignment, or costly machining, lacking simplicity and versatility for fine-tuning.
Innovation Solution
A draw stop with multiple radii sharing a common axis, allowing for adjustable draw length without orientation pins or lugs, ensuring consistent force application and easy installation, enabling precise control of draw length without complex alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cylindrical draw stop with mounting holes is used, then the draw length can be limited to half-inch increments, but this requires many different stops to cover the range of draw length adjustments
Solution Approach 1:
The draw stop is segmented into multiple radii (first radius, second radius, third radius) that share a common axis. Each radius provides a different draw length setting, allowing fine-tuning without requiring multiple separate stops. The stop body is divided into functional segments (radii) that can be independently selected.
Solution Approach 2:
A single draw stop body performs multiple functions by providing several radii with different lengths. This universal design allows one stop to replace what would traditionally require multiple different stops, covering the full range of draw length adjustments while maintaining precision.
2Measurement precision
If a stop with flats or eccentric is used to achieve different draw lengths, then precise alignment with the abutment surface is required, but this results in loosening or tightening of the stop and inconsistent length from one cam to another
Solution Approach 1:
The draw stop utilizes curved radii instead of flat surfaces or eccentrics. The circular geometry of the radii ensures that force is always applied radially to the common axis regardless of the stop's orientation, eliminating alignment requirements and preventing loosening or tightening under force.
Solution Approach 2:
The invention changes the geometric parameter from flat surfaces or eccentrics to multiple radii with different lengths. This parameter change allows the stop to function at any orientation while maintaining consistent force application and draw length, eliminating the need for precise alignment.
3Measurement precision
If the diameter of the cylindrical surface of the stop is increased or decreased to achieve different draw lengths, then fine-tuning is possible, but this requires many different stops to cover the range of draw length
Solution Approach 1:
Instead of manufacturing many different stops with varying diameters, the invention segments a single stop body into multiple radii. This segmentation allows one manufactured component to provide the fine-tuning capability that would otherwise require multiple different parts.
Solution Approach 2:
A single stop body with multiple radii serves as a universal component that can provide any draw length setting within its range. This eliminates the need to manufacture and inventory multiple different stops, simplifying production while maintaining fine-tuning capability.
4Manufacturing precision
If orientation pins or orientation lug and pocket combination are used on the stop and cam, then precise alignment is achieved, but this adds complexity and cost to the cam and stop
Solution Approach 1:
The invention extracts and eliminates the orientation pins or orientation lug and pocket combination from the system. By using radii that work at any orientation, the complex alignment features are removed entirely, simplifying both the stop and cam while maintaining precision.
Solution Approach 2:
The circular geometry of the radii inherently provides alignment independence, making additional orientation features unnecessary. The curved geometry ensures consistent force application regardless of orientation, eliminating the need for complex alignment mechanisms.
Data Source
AI summary
A draw stop for a compound bow having a plurality of radii on perimeter with one common axis, axis is also coincident with mounting axis. The draw stop can be orientated in multiple positions to vary the draw length of a bow. No orientation pins or lugs are needed to achieve this.