Prybar Foot Attachment Sliding Fulcrum Design
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Solution Overview
Problem
Prybars often slip against the grounding surface or damage it during use, and they typically require a specific bend to function as a fulcrum, limiting the ability to pivot at other desired locations along the prybar shaft.
Innovation Solution
A prybar attachment that includes a base portion with a bottom surface and an interface surface, side members forming a channel to receive the prybar, and a fastener to secure the attachment, allowing it to be slidably adjustable along the prybar shaft and providing a larger surface area for contact with the grounding surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a prybar pivots on its bend (standard fulcrum location), then the structure is simple and manufacturing is easy, but the ability to pivot at other desired locations is limited
Solution Approach 1:
The attachment device is divided into separate components: a base portion, side members, and a fastener. This segmentation allows the attachment to be assembled around the prybar at different locations, providing versatility without requiring complex integrated designs. The modular structure enables easy adjustment to different pivot points along the prybar shaft.
Solution Approach 2:
The attachment is designed to be slidable along the prybar shaft, allowing dynamic repositioning of the fulcrum location. The fastener can be removed and repositioned to secure the attachment at different locations, enabling the prybar to pivot at various desired points rather than being fixed at a single bend location.
2Reliability
If a prybar contacts the grounding surface with a small surface area, then the structure is simple, but slipping and damage to the grounding surface occur
Solution Approach 1:
The attachment extends the contact surface area by adding a base portion that contacts the grounding surface in addition to the prybar's contact point. This dimensional extension distributes the force over a larger area, preventing slipping and grounding surface damage without fundamentally changing the prybar's simple structure.
Solution Approach 2:
The attachment acts as an intermediary between the prybar and the grounding surface. It provides a larger contact area that mediates the interaction, distributing the mechanical force and preventing direct concentrated contact that would cause slipping or damage to the grounding surface.
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 attachment prevents slipping and damage to the grounding surface by providing a larger contact area and allows the prybar to pivot at any desired location along the shaft, enhancing usability and safety.
Implementation Method 1
The attachment may prevent slipping between a grounding surface and the prybar
Data Source
AI summary
An attachment for a prybar including a base portion having a bottom surface and an interface surface opposite the bottom surface, and opposing first and second sides that extend upwardly from the base portion and define a channel therebetween. The channel is adapted to receive a prybar, and a pin is disposed in first and second apertures in the respective first and second sides to retain the attachment on the prybar. The attachment provides a fulcrum surface for the prybar that may be positioned anywhere along a length of a prybar shaft of the prybar.