Ring-Shank Fastener Structure for High Load and Withdrawal Strength
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Solution Overview
Problem
The construction industry faces challenges with fasteners due to the need for specific tools and numerous varieties, leading to incorrect usage, wood splitting, and high inventory costs, which can result in not meeting structural design loads and causing confusion among users.
Innovation Solution
A fastener with a ring structure at the bottom of its elongated shaft, featuring a specific ratio of smooth to deformed shank, designed for superior load and withdrawal strengths, tested to meet ASTM standards, and available in various diameters and materials to suit multiple applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple varieties of fasteners are used for different applications, then specific structural requirements can be met, but inventory complexity and user confusion increase
Solution Approach 1:
The patent applies universality by designing a single fastener type with a ring structure that can serve multiple applications. The ring structure provides enhanced grip and load-bearing capacity while the fastener can be used in various wood thicknesses and structural applications, replacing the need for multiple specialized fastener types.
Solution Approach 2:
The patent uses parameter changes by varying the ring structure dimensions, spacing, and fastener diameter to optimize performance for different applications. By adjusting parameters like ring diameter, ring spacing, and shank diameter, a single fastener design can meet different structural requirements without requiring completely different fastener types.
2Strength
If larger diameter fasteners are used, then higher lateral load capacity is achieved, but wood splitting risk increases
Solution Approach 1:
The patent applies local quality by concentrating the load-bearing function in the ring structure rather than requiring a uniformly large diameter throughout the fastener. The rings provide localized grip and strength at critical points while the smaller diameter shank reduces the risk of wood splitting during installation and under load.
Solution Approach 2:
The patent uses a composite structure combining a smooth shank with a ring-deformed section. This composite design allows the fastener to achieve high lateral strength through the ring structure while maintaining a smaller overall diameter that is less prone to causing wood splitting.
3Strength
If deformed shank is used throughout, then grip strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the shank into two distinct sections: a smooth shank portion and a ring-deformed portion. This segmentation allows the deformed section to provide enhanced grip strength only where needed, while the smooth section remains simple to manufacture and install, reducing overall manufacturing complexity.
Solution Approach 2:
The patent applies local quality by applying the deformed ring structure only to a specific portion of the shank rather than the entire length. This localized deformation provides grip strength at the critical engagement point while keeping the rest of the fastener simple and easy to manufacture.
Data Source
AI summary
A fastener includes a head, shank and a point of specific length, shape and parts. The shank has two parts, a smooth shank and deformed shank. There is a specific ratio for length between the smooth shank and deformed shank. The deformed shank is ringed. A specific thickness, specific material and specific dimension and design of head, shank and point is designed to have superior load and withdrawal strengths. The diameter of the fasteners are 0.115, 0.125, and 0.135. The fasteners are offered as single unit or multiple units for use.