Textured Pry Bar Tip for Slip-Resistant Workpiece Engagement
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Solution Overview
Problem
Conventional pry bars experience slipping relative to workpieces, reducing their effectiveness and the force they can apply.
Innovation Solution
The pry bar design incorporates a textured surface section on the tip with protrusions and grooves that enhance engagement with the workpiece, increasing friction and preventing slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smooth tip surface is used on the pry bar, then the manufacturing process is simple, but the pry bar slips relative to the workpiece reducing effectiveness
Solution Approach 1:
The tip surface is modified locally with protrusions and grooves only at the engagement area, while the rest of the pry bar maintains its simple structure. This localized texturing increases friction and prevents slipping at the critical contact point without complicating the overall device or manufacturing process
2Reliability
If a textured surface with protrusions and grooves is added to the tip, then slipping is prevented and engagement is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The tip geometry is defined by specific parameters including protrusion height (0.02-0.08 inches), groove depth (0.01-0.05 inches), and spacing dimensions. By controlling these parameters within defined ranges, the textured surface provides reliable engagement while maintaining manufacturability through standardized fabrication processes
3Reliability
If the protrusions and grooves are made deeper to increase grip, then slipping resistance improves, but the tip strength and structural integrity are reduced
Solution Approach 1:
The protrusion and groove dimensions are optimized within specific ranges: protrusion height of 0.02-0.08 inches and groove depth of 0.01-0.05 inches. These parameter values provide sufficient slip resistance while maintaining adequate material cross-section to preserve tip strength and prevent structural failure during use
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 textured surface design improves pry bar grip on workpieces, allowing for greater force application without disengagement, while maintaining strength and manufacturability.
Implementation Method 1
The textured surface section includes a plurality of protrusions and a plurality of grooves. Each protrusion includes a plurality of edges that together define an upper surface of the protrusion. Each groove extends along at least one of the plurality of protrusions. When the textured surface section is engaged with a workpiece, one or more of the plurality of grooves receives a portion of the workpiece such that the grooves resist movement of the workpiece relative to the engagement end during use of the pry bar.
Data Source
AI summary
A tool, such as a pry bar including a textured tip is shown. In one embodiment, the textured tip includes a plurality of projections and a plurality of grooves. Various textured tip embodiments are configured to increase friction/gripping with a workpiece, thereby increasing a pry force applied to the workpiece before the pry bar slips and/or loses contact with the workpiece.