Radial Protrusion Screw Head for Debris Relief and Board Grip

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Solution Overview

Problem

Existing screw designs do not effectively accommodate debris generated during fastening and lack improved grip performance after being fastened into a board.

Innovation Solution

A screw design featuring a head with radially arranged protrusions, a shank with varying thread and surface textures, and a conical tip with a flute, which enhances debris accommodation and grip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a flat head screw design is used, then the screw can sit flush on the board surface, but it cannot accommodate debris generated during fastening

Engineering Contradiction:

Improveflush mounting capabilityVSAvoiddebris accumulation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The head is segmented into multiple frustoconical portions arranged radially, creating distinct chambers that can accommodate debris while maintaining the flush mounting capability. Each frustoconical portion acts as an independent debris receptacle.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful debris generated during fastening is converted into a beneficial feature by designing the head with frustoconical portions that specifically accommodate and contain the debris, preventing it from interfering with the flush mounting or creating mess.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Device complexity

If a conventional screw head design is used, then the structure remains simple, but grip performance after fastening is insufficient

Engineering Contradiction:

Improvehead structure simplicityVSAvoidgrip performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Different regions of the head are given different geometries through the frustoconical portions, creating local variations in surface topology that enhance grip. The protrusions and frustoconical shapes provide localized mechanical interlocking with the board material.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The frustoconical portions introduce curved surfaces and rounded edges to the head design, replacing completely flat surfaces. These curved geometries better conform to the board surface and provide improved mechanical grip while maintaining manufacturing simplicity.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Data Source

PatentUS12369959B2Screw with an improved screw head

Publication Date: 2025.07.29 PRIMESOURCE BUILDING PRODUCTS INC

AI summary

A screw with an improved screw head is provided. The screw may include a shank in between a head and a tip. The head may include a plurality of protrusions provided radially along the head. Each of the plurality of protrusions may include a protrusion wall, a leading wall, a trailing wall, and a bottom wall; the trailing wall may include one single trailing surface, the leading wall may include a plurality of leading surfaces, and the bottom wall may include at least one bottom surface.