Segmented Socket Bit Geometry for Damaged Fastener Grip
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Solution Overview
Problem
Existing fasteners often slip during tightening or loosening due to worn components, corrosion, or damage, leading to inefficiencies and the need for additional tools like bolt extractors.
Innovation Solution
A multi-grip socket bit with segmented portions that engage the fastener head, allowing efficient torque transfer and eliminating the need for bolt extractors, featuring a ball-like shape with laterally-bracing sidewalls and engagement cavities for secure grip in both clockwise and counterclockwise directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-grip socket bits are used, then the tool structure is simple, but slippage occurs on worn, corroded, or damaged fastener heads
Solution Approach 1:
The socket bit is divided into multiple gripping segments (first grip portion, second grip portion, third grip portion) instead of a single grip interface. Each segment can independently engage with the fastener head, ensuring that if one segment slips due to wear or damage, other segments maintain the grip. This segmentation directly resolves the contradiction by improving grip reliability through multiple engagement points while keeping each individual segment relatively simple in structure.
Solution Approach 2:
The gripping segments are designed with asymmetric geometries featuring multiple engagement surfaces (first engagement surface, second engagement surface, third engagement surface) that contact different portions of the fastener head. This asymmetric design allows the bit to engage with various fastener head configurations and orientations, improving reliability by ensuring at least one engagement surface maintains effective contact even when other surfaces slip or fail.
2Reliability
If bolt extractors are used to remove damaged fasteners, then slippage is prevented, but additional tools and drilling operations are required
Solution Approach 1:
The socket bit is designed with multiple gripping segments that can adapt to various fastener head conditions (worn, corroded, damaged) without requiring different tools. The bit can engage with standard fastener heads and also effectively grip damaged heads that would normally require specialized extractors. This multi-functionality eliminates the need for separate bolt extractor tools while maintaining high grip reliability across different fastener conditions.
Solution Approach 2:
The gripping segments are designed to dynamically adapt to the fastener head surface during engagement. The multiple engagement surfaces allow the bit to automatically adjust its grip points based on the actual condition of the fastener head, providing reliable torque transmission whether the fastener is new, worn, or damaged, thereby replacing the need for specialized extractors.
3Ease of manufacture
If conventional driver end bits are used, then the tool design is standardized, but slippage occurs and additional specialized tools are needed for extraction
Solution Approach 1:
The socket bit maintains a standardized attachment body for compatibility with conventional torque tools, while the working end is segmented into multiple gripping portions. This segmentation allows reliable torque transfer to damaged or worn fasteners without requiring specialized extractor tools, thus improving reliability while preserving manufacturing standardization at the attachment interface.
Solution Approach 2:
The invention merges the functions of standard driver bits and bolt extractors into a single tool. The attachment body maintains standardized dimensions for compatibility with conventional torque tools, while the integrated multiple-grip socket bit head combines the torque application capability of standard bits with the extraction capability of specialized tools, eliminating the need for separate extractor tools.
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 multi-grip socket bit effectively prevents slippage and damage to fasteners, enabling efficient tightening or loosening operations without requiring additional tools, and is compatible with various torque tools.
Implementation Method 1
The present invention 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
Implementation Method 2
The engagement cavity extending normal and into the bracing surface... the bracing surface of each of the plurality of laterally-bracing sidewalls being a concave surface
Data Source
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AI summary
A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing 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 an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance and positioned offset from the second lateral edge by a second distance.