Multi-directional Driver Bit Segmented Grip for Damaged Fasteners
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Solution Overview
Problem
Existing fastener tools often slip on worn, corroded, or damaged fasteners, leading to damage during tightening or loosening, and require unnecessary drilling for bolt extractors.
Innovation Solution
A multi-grip socket bit with segmented portions that engage the fastener head, providing efficient torque transfer and preventing slippage, compatible with various torque tools, and capable of bidirectional operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional driver bits are used on worn or corroded fasteners, then the tool can be simple in design, but slippage occurs leading to fastener damage
Solution Approach 1:
The driver bit is divided into multiple segmented portions (protrusions) that can independently engage with the fastener head. These segments are positioned around the perimeter and can bite into the fastener head surface, providing multiple contact points that prevent slippage even when the fastener is worn or corroded.
Solution Approach 2:
The segmented portions have varying geometries and orientations designed to engage with specific local features of the fastener head. Each segment is optimized to bite into the fastener surface at different locations, creating localized grip points that adapt to the fastener's condition.
2Adaptability or versatility
If bolt extractors are used to remove damaged fasteners, then fastener removal is possible, but drilling and additional tools are required
Solution Approach 1:
The driver bit is designed with dual functionality: it can both drive intact fasteners and extract damaged ones. The segmented portions can engage with intact fastener heads for driving, and also bite into damaged fastener heads for extraction, eliminating the need for separate extractor tools.
Solution Approach 2:
Instead of using extractors that require drilling holes into the fastener to grip it, this invention inverts the approach by having the bit segments bite into the fastener head surface directly, similar to how a driving bit engages with an intact fastener, thereby removing the need for preliminary drilling.
3Force
If standardized hex holder driver bits are used, then compatibility with power tools is ensured, but torque application is limited and slippage occurs on damaged fasteners
Solution Approach 1:
The segmented portions are pre-positioned and oriented to automatically bite into the fastener head surface upon engagement. This preliminary biting action creates secure grip points before full torque is applied, preventing slippage even on damaged fasteners where the grip surface may be compromised.
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 effectively prevents slippage and damage to fasteners, eliminating the need for bolt extractors and allowing for higher torque application without damaging the socket fastener or tool, while being adaptable to different fastener profiles and tools.
Implementation Method 1
The design uses a series of segmented portions that bite into the head of the fastener and allow for efficient torque transfer between the driving bit and the head portion of the fastener
Data Source
AI summary
A screw bit body allowing for torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a plurality of intermittent sidewalls, a first base, and a second base. The laterally-bracing sidewalls and plurality of intermittent sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates a gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the concave surface and the convex surface. The engagement cavity includes an angled driving portion and a concave portion. The angled driving portion is positioned adjacent to the first lateral edge with the concave portion being positioned opposite to the first lateral edge, across the angled driving portion.