Adjustable Chain Wrench With Pivoting Arm and Sprocket Grip
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Solution Overview
Problem
Existing chain wrenches are limited in length and often damage or crush the surface of objects due to their fixed gripping mechanism, lacking the ability to provide an adjustable and non-damaging grip for objects with circular cross sections.
Innovation Solution
An adjustable chain wrench utilizing ordinary high-speed drive chain with a sprocket for gripping, allowing the chain to wrap nearly completely around the object, eliminating the need for a damaging gripping portion and enabling unlimited length potential by using multiple chains and a pivoting arm system to secure the chain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed gripping mechanism is used to hold the object, then the chain wrench can secure the object, but the gripping mechanism tends to crush or mar the surface of the object
Solution Approach 1:
The patent removes the traditional fixed gripping mechanism (jaws or teeth) from the chain wrench design. Instead, the chain itself is configured to wrap around and grip the object directly, eliminating the component that causes surface damage while maintaining grip security through the distributed contact of the wrapped chain
Solution Approach 2:
The patent uses a flexible chain that can conform to and wrap around the object's surface. This flexible chain provides grip through friction and geometric interlocking without rigid contact points, thereby securing the object while avoiding surface crushing or marring
2Device complexity
If a traditional chain wrench design is used, then the structure is simple, but the length is limited and cannot be adjusted
Solution Approach 1:
The patent divides the chain into multiple replaceable segments or links that can be connected in different quantities. This segmentation allows the user to assemble the chain to the required length for different applications while maintaining the simple overall structure of a chain-based wrench
Solution Approach 2:
The patent introduces adjustable and replaceable components including the chain length, number of sprockets, and arm configuration. These dynamic elements allow the wrench to be adapted to various object sizes and applications without fundamentally changing the basic design structure
3Reliability
If the chain wraps completely around the object, then the grip is secure and slip-resistant, but the wrench structure becomes more complex
Solution Approach 1:
The patent employs a universal pivoting arm mechanism that can accommodate one or more chains and work with objects of various sizes and shapes. This multi-functional arm system provides the capability to achieve complete or partial wrapping as needed, delivering slip-resistant grip without requiring multiple specialized tools or complex configurations
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 solution provides a secure, slip-resistant grip for objects of various cross sections, preventing damage and allowing for effective turning or holding with minimal slippage, as the chain covers at least 90% of the object's perimeter.
Implementation Method 1
provides a secure, slip-resistant grip for objects of various cross sections
Implementation Method 2
the chain covers at least 90% of the object's perimeter
Data Source
AI summary
A chain wrench which utilizes ordinary high-speed drive chain to form an adjustable, replaceable chain wrench of unlimited length potential. A sprocket for gripping at the head of the wrench, and allows the chain to nearly completely wrap about the object to be turned or held, preventing the need for a gripping portion which tends to damage or crush the object being turned or held. Multiple such chains could be used simultaneously.