Adjustable One-Way Screw Remover Collar
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Solution Overview
Problem
Conventional tools for removing one-way fasteners are ineffective when the fastener head is inaccessible or varies in size, as they are not adjustable to fit differently sized fasteners, limiting their applicability.
Innovation Solution
An adjustable device comprising a shaft and a collar with a threaded portion and adjustable diameter, allowing the device to fit variously sized fastener heads by using a member to change the collar's diameter or employing flexible splines for expansion, enabling the removal of one-way fasteners with different head diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size collar is used to remove one-way fasteners, then the device can effectively remove fasteners of a specific size, but it cannot accommodate fasteners with different head diameters
Solution Approach 1:
The collar is designed with adjustable diameter capability, allowing it to dynamically change size to accommodate different fastener head diameters. This dynamic adjustment feature enables a single device to handle multiple fastener sizes without requiring multiple fixed-size collars.
Solution Approach 2:
The collar's diameter parameter can be changed through adjustment mechanisms, allowing the same collar to fit various fastener sizes. This parameter variability resolves the contradiction between maintaining a simple device structure and achieving adaptability to different fastener dimensions.
2Ease of operation
If conventional extraction devices with fixed jaws are used, then they can grasp accessible fastener heads, but they are useless when fastener heads are inaccessible or have no accessible sides
Solution Approach 1:
The device is designed to handle multiple scenarios: it can extract both accessible and inaccessible one-way fasteners, and it can accommodate various fastener head sizes. This multi-functionality allows a single device to replace multiple specialized tools.
Solution Approach 2:
The adjustable collar acts as an intermediary component that adapts between the extraction device and the fastener head. By adjusting the collar diameter to match the fastener head size, it creates a universal interface that works with different fastener types and accessibility conditions.
3Reliability
If a collar is designed to fit specific fastener sizes, then it provides precise engagement, but it may not fit over fasteners with varying diameters due to manufacturing variations
Solution Approach 1:
The collar's diameter parameter is made adjustable within a range, allowing users to compensate for manufacturing variations in fastener sizes. This parameter flexibility ensures reliable engagement across different fastener batches and manufacturers while maintaining precise fit through adjustment.
Data Source
AI summary
A tool for removing conventional one way fasteners that includes, generally, a member, a collar, and, a shaft that can be removably received by the collar, wherein in the shaft is configured to engage regions of the fastener head. The collar is adjustable to fit fastener heads of different sizes. The member can be configured to correspond to a threaded portion of the outer surface of the collar. The collar may also have a bottom portion that includes multiple splines.