Archery Arrow Puller with Cam Lever and Self-Clamping Jaws
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern archery technology, particularly with carbon fiber arrows, poses challenges in safely and non-destructively removing arrows from targets due to increased kinetic energy, deeper penetration, and smaller diameters, which existing devices fail to address effectively, especially in terms of accommodating a wide range of arrow shaft diameters and providing mechanical advantage for extraction.
Innovation Solution
A ergonomic pistol-gripped mechanical aid with three jaws lined with a non-marring surface, automatically deploying and self-clamping through angled ramps, provides an amplified mechanical advantage using a lever and cam mechanism for one-handed extraction, suitable for various arrow diameters and types, without disassembly or damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If carbon fiber arrows with smaller diameter and stiffer spine are used, then arrow penetration depth increases, but arrow removal from target becomes more difficult and dangerous
Solution Approach 1:
The patent introduces an arrow puller device as an intermediary tool between the user and the embedded arrow. This device includes a gripping mechanism that contacts the arrow shaft and a lever system that provides mechanical advantage, allowing safe extraction without direct hand contact with the high-force arrow
Solution Approach 2:
The arrow puller device segments the extraction function into distinct components: a gripping element that contacts the arrow shaft, a lever arm that provides mechanical advantage, and a fulcrum that amplifies the extraction force. This segmentation allows each component to be optimized for its specific function
2Productivity
If carbon fiber arrows with smaller diameter are used, then arrow efficiency increases, but gripping surface area for manual removal decreases
Solution Approach 1:
The arrow puller device serves as an intermediary that compensates for the reduced gripping surface area. The gripping element is designed with features such as teeth or textured surfaces that increase friction and mechanical interlocking with the smooth carbon fiber shaft, allowing secure grip despite the small diameter
Solution Approach 2:
The gripping element parameters are optimized for small diameter arrows, including adjusted contact surface area, friction coefficients through material selection or surface treatment, and geometric features that increase mechanical interlocking. This allows effective gripping of arrows with diameters as small as 6mm
3Force
If mechanical advantage is provided for arrow extraction, then extraction force is amplified, but device complexity increases
Solution Approach 1:
The device concentrates mechanical advantage in the critical extraction zone through a localized lever and fulcrum system, while keeping other parts of the device simple. The fulcrum is positioned to maximize the mechanical advantage ratio (typically 3:1 or 4:1) with minimal additional components
Solution Approach 2:
The device is designed to be self-contained and self-operating, requiring no external power source or complex control systems. The user simply positions the gripping element on the arrow shaft and applies force to the lever handle, which automatically provides the mechanical advantage through the built-in fulcrum mechanism
4Adaptability or versatility
If three jaw clamping system is used, then adaptability to various arrow diameters improves, but device complexity increases
Solution Approach 1:
The three jaw clamping system uses asymmetric positioning of the jaws around the circular arrow shaft, spaced at 120-degree intervals. This asymmetric arrangement provides stable triangular clamping geometry that adapts to various diameters while maintaining balanced force distribution and minimizing device complexity
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
Enables safe, easy, and non-destructive extraction of arrows from foam and other targets, preventing bodily harm and arrow damage, accommodating a wide range of diameters, and reducing physical effort required for removal.
Implementation Method 1
provides an amplified mechanical advantage using a lever and cam mechanism for one-handed extraction
Implementation Method 2
automatically deploying and self-clamping through angled ramps
Data Source
AI summary
An archery arrow/bolt pulling device designed for the safe, easy, non-destructive and one handed extraction of deeply embedded, complete arrow or bolt assemblies regardless of shaft diameter or arrowhead type from foam and other target materials. This device pulls with three surrounding gripping jaws in a coaxial path with the long axis of the arrow/bolt and the combined mechanical advantage power of lever, fulcrum and cam while overcoming the minimal movement of the load end of the lever by means of a ratcheting pawl and toothed pull rod.