Archery Bow Limb Pocket Adjustment for Tiller and String Tension
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Solution Overview
Problem
Existing archery bow systems face limitations in adjusting bow limb tiller and draw weight, requiring multiple limb replacements that can disrupt shooting technique and muscle memory, and are costly and inconvenient.
Innovation Solution
An archery bow assembly with repositionable limb contact members within the limb pocket, allowing for adjustable string tension without significantly impacting draw weight, by positioning limb contact members at various locations along the limb pocket channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If limb bolts are adjusted to change tiller, then limb position relative to riser is adjusted, but draw weight adjustment is impeded because each limb bolt can only undergo a limited number of rotations
Solution Approach 1:
The limb pocket assembly is segmented into multiple independent adjustment components: limb bolts for tiller adjustment and separate limb contact members (with set screws) for draw weight adjustment. This segmentation allows each component to perform its specific function independently without interfering with the other, resolving the contradiction between tiller adjustment range and draw weight adjustment capability
Solution Approach 2:
Limb contact members act as intermediary elements between the limb and the riser. These contact members can be positioned at different locations along the limb pocket channel, providing an additional degree of freedom for adjustment. By introducing this intermediary mechanism, the system can adjust both tiller and draw weight without being constrained by the limited rotation range of the limb bolts
2Adaptability or versatility
If multiple pairs of limbs are purchased and transported to accommodate varied archer preferences, then shooting characteristics can be manipulated, but cost and convenience are reduced
Solution Approach 1:
The limb pocket assembly incorporates dynamic, repositionable limb contact members that can be moved along the limb pocket channel to different locations. This dynamic adjustment capability allows archers to change shooting characteristics by repositioning the contact members rather than replacing entire limb assemblies, providing versatility while maintaining cost-effectiveness and convenience
Solution Approach 2:
The system enables parameter changes in shooting characteristics by adjusting the position of limb contact members along the limb pocket channel. By changing the location parameter of the contact members, archers can modify limb flex and shooting characteristics without needing to purchase multiple pairs of limbs, thereby reducing cost and improving convenience
3Manufacturing precision
If limbs are replaced to adjust shooting characteristics, then accuracy can be optimized, but archer's shooting technique and muscle memory are disrupted
Solution Approach 1:
By segmenting the adjustment functionality into repositionable limb contact members separate from the limb bolts, the system allows for fine-tuning of shooting characteristics without requiring limb replacement. This maintains the familiar limb interface that archers have adapted to, preserving shooting technique and muscle memory while still achieving optimized accuracy
Solution Approach 2:
The limb contact members can be pre-positioned at optimal locations along the limb pocket channel to achieve desired shooting characteristics before the archer begins shooting. This preliminary adjustment allows archers to optimize accuracy while maintaining consistent shooting technique, as the adjustments are made in advance rather than requiring limb replacement that would disrupt muscle memory
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An adjustable limb pocket 110 of an archery bow 100 includes a pocket insert 124 having at least one channel 130, 132 that extends along a length of the pocket insert 124. The at least one channel 130,132 can include a plurality of attachment positions 154A-C,156A-C. A limb contact member 134,136 can be coupled to one of the plurality of attachment positions 154A-C,156A-C to support a bow limb 104 retained within the limb pocket 110. The one or more limb contact members 134,136 can be repositionable within the one or more channels 130,132 of the pocket insert 124 to vary a bowstring tension of the archery bow 100 and/or manipulate the movement a distal tip of the bow limb 104 as the bowstring is drawn and released.