Rotatable Power Tool Hook Assembly with Friction Retention
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Solution Overview
Problem
Conventional hook assemblies for power tools are either fixed or limited to discrete adjustable positions, lacking the flexibility to be oriented at any desired angle, which restricts their usability and convenience.
Innovation Solution
A hook assembly with an end cap and a rotatably coupled hook, where an O-ring is positioned between the end cap and the hook, and protrusions on the end cap or hook engage the O-ring to secure the hook in selected rotational positions, allowing for continuous adjustment without being limited to pre-defined detent positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a detent arrangement is used to secure the hook in discrete positions, then the hook can be held securely in place, but the hook cannot be repositioned continuously to any desired angle
Solution Approach 1:
The patent changes the parameter of position from discrete (detent positions) to continuous (any angle), allowing the hook to be oriented at any desired angle relative to the power tool body by eliminating the detent mechanism and using a friction-based retention system instead
2Adaptability or versatility
If the hook is made rotatable for continuous adjustment, then the hook can be oriented at any desired angle, but the hook may not be secured firmly enough during use
Solution Approach 1:
The patent introduces an intermediary friction-based retention mechanism between the hook and the power tool body, using surface friction and normal force to secure the hook in its rotated position without requiring discrete detent positions, thus maintaining both adjustability and security
3Adaptability or versatility
If a fixed hook assembly is used, then the structure is simple and reliable, but the hook cannot be repositioned at all
Solution Approach 1:
The patent transitions from a static fixed hook to a dynamic rotatable hook that can be adjusted to any angle, adding rotational freedom while maintaining structural simplicity through the use of a straightforward friction-based retention mechanism rather than complex detent systems
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 the hook to be oriented at any desired angle relative to the end cap, providing a greater range of adjustment and improved usability compared to conventional hook assemblies, while maintaining the position securely during use.
Implementation Method 1
A protrusion on one of the outer periphery of the end cap and the hook frictionally engages the O-ring to secure the hook in at least one selected rotational position relative to the end cap
Data Source
AI summary
A hook assembly includes an end cap having an outer periphery. The end cap is configured to be connected to a power tool. A hook is rotatably coupled to the outer periphery of the end cap. An O-ring is positioned between the outer periphery of the end cap and the hook. A protrusion is included on one of the outer periphery of the end cap and the hook to frictionally engage the O-ring to secure the hook in at least one selected rotational position relative to the end cap.