Chamfered Open End Wrench Jaw for Angled Access
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Solution Overview
Problem
Conventional open end wrenches struggle to effectively engage and apply torque to workpieces located in hard-to-reach areas due to reduced jaw thickness and engagement area when the wrench is angled, leading to increased turns and reduced torque application.
Innovation Solution
The design incorporates a chamfer on the jaws of the wrench head, maintaining constant thickness and increasing the engagement area when angled, with optimal chamfer angles between 20 to 30 degrees providing significant improvements in contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wrench is angled to access hard-to-reach workpieces, then access to hard-to-reach areas is improved, but the jaw thickness and engagement area are reduced
Solution Approach 1:
The patent applies a chamfer specifically to the engagement surface of the jaw where it contacts the workpiece, while maintaining the full thickness of the jaw body. This localized modification increases the engagement area at the contact point without compromising the overall structural strength and thickness of the jaw, thereby resolving the contradiction between improved access and maintained strength.
2Adaptability or versatility
If the wrench is angled to access hard-to-reach workpieces, then access to hard-to-reach areas is improved, but the engagement area is reduced
Solution Approach 1:
The chamfer is applied locally to the engagement surface of the jaw, creating an enlarged contact area specifically where the jaw meets the workpiece. This localized geometric modification increases the engagement area at the critical contact point while maintaining the compact overall dimensions of the wrench, enabling better access to hard-to-reach areas without sacrificing engagement area.
Data Source
AI summary
An open end wrench head including first and second jaws that are adapted to engage a workpiece located in a hard-to-reach area. The jaws can include a chamfered portion on the end of the jaws that allows the wrench to be presented at an angle to the workpiece and still maximize the engagement area between the wrench and the workpiece.