Sinusoidal Edge Support Washer Reduces Shear Damage
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Solution Overview
Problem
Conventional support washers cause shearing and damage when used with materials like wood, synthetic materials, or elastomers, especially under stress or with aggressive scrapers, due to their circular edges and lack of adaptation to material flexibility.
Innovation Solution
The support washers feature linear outer edges, sinusoidal designs with rounded bellies and hollows, and a conical upper surface that thins progressively from the center to the edge, reducing shearing impact and preventing scrapers from catching the washer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional circular-edged support washers are used, then the washer provides basic support function, but the circumferential edge exerts shear force on soft materials causing damage and shearing
Solution Approach 1:
The patent applies curvature by replacing the conventional straight circumferential edge with a rounded edge having a radius of curvature. This rounded edge geometry eliminates the sharp corner that concentrates stress and creates shear force, thereby preventing damage to soft materials while maintaining the washer's support function.
2Shape
If the washer outer edge is strictly circular, then the washer has simple geometry, but the edge length is insufficient to reduce shear impact on material
Solution Approach 1:
The patent modifies the edge geometry from a straight circular edge to a rounded edge with specific radius of curvature. This curvature increases the effective edge length in contact with the material, distributing the load more evenly and reducing shear impact while maintaining geometric simplicity.
Data Source
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AI summary
The washer according to the invention has a generally circular shape and is used for supporting a screw head, the shank of which penetrates the central hole (7') of the washer. When viewed from a planar perspective, the outer edges of the washer have a sinusoidal shape with depressions (9) and elevations (10).