Segmented Threaded Fastener Shank for Higher Torsion Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Threaded fasteners often fail due to significant torsional stresses when driven into substrates like concrete, leading to shank breakage and removal issues.
Innovation Solution
A threaded fastener design with a shank configuration that includes multiple portions and helical thread formations, where the first helical thread formation defines grooves adjacent to the tip, allowing for a stronger shank with larger diameters by reallocating material from thread formations to the shank, reducing torsional forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single continuous thread formation is used along the shank, then the manufacturing process is simplified, but the shank must be smaller to accommodate the thread material, reducing overall strength
Solution Approach 1:
The thread formation is segmented into multiple discrete sections: no threads in the first portion, first helical threads in the second portion, and combined first and second helical threads in the third portion. This segmentation allows the shank to have a larger overall diameter while still providing adequate thread engagement through the distributed thread sections.
Solution Approach 2:
The patent introduces a second helical thread formation in addition to the first, creating a multi-layered thread structure in the third portion. This dimensional addition allows for enhanced thread engagement capability without requiring a larger shank diameter, as the second thread formation utilizes the same radial space more efficiently.
Data Source
AI summary
A threaded fastener including a head, a shank connected to the head at a first end of the shank, the shank includes a first portion, a second portion, a third portion, and a tip at an end of the shank opposite the head. The fastener includes a first helical thread formation extending outwardly from the second and third portions of the shank, and a second helical thread formation extending outwardly from a section of the third portion of the shank that is adjacent to the tip. The first helical thread formation defines grooves in the section of the third portion of the shank that is adjacent to the tip.