Retractable Allen Wrench Crossbow Cocking Device
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Solution Overview
Problem
Cocking a crossbow is difficult due to the tension applied by the bow limbs, and users face challenges when adding, adjusting, or replacing crossbow components at remote locations without a set of Allen wrenches, leading to potential equipment failure and inability to participate in activities.
Innovation Solution
A multi-purpose crossbow cocking device integrating a draw-string mechanism with retractable Allen wrenches of varying sizes, allowing for easier cocking and component manipulation, combining the functionality of a cocking device with a set of Allen wrenches in a single, compact tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a separate set of Allen wrenches is carried for component adjustment at remote locations, then component maintenance capability is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines multiple Allen wrenches of different sizes into a single integrated cocking device. The handles of the cocking device serve as storage compartments that contain multiple Allen wrenches, merging what would traditionally be separate tools (cocking device and set of Allen wrenches) into one unified instrument. This eliminates the need to carry separate Allen wrenches while maintaining the ability to adjust various crossbow components.
Solution Approach 2:
The cocking device is designed with multi-functionality by incorporating multiple Allen wrenches within its structure. The device not only provides the primary function of cocking the crossbow but also serves as a maintenance tool for adjusting various components that require different sized Allen wrenches. This universal design allows a single device to perform multiple functions that would traditionally require separate tools.
2Ease of repair
If a separate set of Allen wrenches is carried for component adjustment, then component maintenance capability is improved, but weight increases
Solution Approach 1:
The patent combines multiple Allen wrenches of different sizes into a single integrated cocking device. The handles of the cocking device serve as storage compartments that contain multiple Allen wrenches, merging what would traditionally be separate tools (cocking device and set of Allen wrenches) into one unified instrument. This eliminates the need to carry separate Allen wrenches while maintaining the ability to adjust various crossbow components.
3Adaptability or versatility
If multiple Allen wrenches are carried for different component sizes, then adaptability for component adjustment is improved, but device complexity increases
Solution Approach 1:
The patent employs a nesting arrangement where multiple Allen wrenches are stored within the handles of the cocking device. The handles are designed with internal compartments or cavities that accommodate the Allen wrenches, allowing one object (the cocking device) to contain multiple smaller objects (Allen wrenches). This nesting structure provides adaptability for adjusting components of various sizes while keeping the overall device compact and organized.
4Ease of operation
If Allen wrenches are made retractable for compact storage, then ease of transport is improved, but device complexity increases
Solution Approach 1:
The patent incorporates retractable Allen wrenches that can be extended when needed for component adjustment and retracted when not in use. This dynamic design allows the wrenches to change their state between stored and operational positions, providing compact storage for easy transport while maintaining accessibility when required. The retractable mechanism adds movement capability to the otherwise static storage structure.
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
The device simplifies crossbow cocking by reducing the required pulling force and allows for on-site adjustment and maintenance of crossbow components without the need for a separate set of Allen wrenches, enhancing usability and reducing the risk of forgotten tools.
Implementation Method 1
The leverage provided by the draw string and its placement on the end of the stock make the process of drawing the bow string into cocking position much easier. The cocking device reduces the pulling force needed to cock the crossbow by about one-half.
Implementation Method 2
U.S. Pat. No. 5,243,956, incorporated by reference herein, describes one such cocking device comprising a draw string or cord with two handles and a pair of pulleys.
Data Source
AI summary
A multi-purpose crossbow cocking device having two handles attached by a draw cord or string. Slidably affixed to the cord are a pair of pulley members having hooks that engage a bow string of a crossbow. The handles may have an inner cavity. One or both of the handles may contain one or more Allen wrenches pivotally connected to the handle within the inner cavity. In its retracted position, the Allen wrench is housed within the inner cavity. In its extended position, the distal end of the Allen wrench is placed external of the handle's inner cavity and may be used to drive a bolt or screw with a hexagonal shaft head. The Allen wrenches may be different sizes.