Spiral-Groove Thread Cleaning Tap for Misalignment Correction

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Solution Overview

Problem

Existing foreign matter removing taps struggle with accurate insertion into internal threads, leading to insufficient removal of foreign matter and potential damage to the thread surface, particularly when the position or angle of insertion is shifted.

Innovation Solution

A foreign matter removing tap with a tapered thread portion and internal thread engagement portion, featuring a spiral groove, allows for easy adjustment of insertion position and angle, minimizing damage by engaging with the internal thread groove to correct alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a foreign matter removing tap is used to remove foreign matter from internal threads, then foreign matter removal capability is improved, but insertion accuracy deteriorates requiring skilled manual operation

Engineering Contradiction:

Improveforeign matter removal capabilityVSAvoidinsertion accuracy

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The tap includes a guide portion at its tip end that performs preliminary alignment action before the threaded portion engages with the internal thread. The guide portion has a diameter smaller than the major diameter of the internal thread, allowing it to enter first and establish correct position and orientation, thereby compensating for insertion inaccuracies

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If the tap is inserted with shifted position or angle, then operation simplicity is improved, but foreign matter removal completeness deteriorates

Engineering Contradiction:

Improveoperation simplicityVSAvoidforeign matter removal completeness

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The tap features a tapered threaded portion where the pitch gradually increases from the small diameter end toward the large diameter end. This gradual parameter change allows the tap to self-align and correct insertion angle deviations, maintaining effective foreign matter removal even when initial insertion parameters are not precise

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the tap is inserted with shifted position or angle, then operation flexibility is improved, but internal thread damage risk increases

Engineering Contradiction:

Improveinsertion flexibilityVSAvoidinternal thread damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The guide portion at the tip of the tap serves as a cushioning element that absorbs and corrects insertion errors before the main threaded portion engages with the internal thread. This preliminary correction prevents misalignment from propagating to the functional threaded section, thereby protecting the internal thread from damage

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentEP4603219A1Foreign matter removal tap

Publication Date: 2025.08.20 RISE WORKS INC

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AI summary

A foreign matter removing tap is a foreign matter removing tap for removing foreign matter adhering to a surface of an internal thread and has a tapered thread portion and an internal thread engagement portion, and the tapered thread portion partially or entirely has a spiral groove portion.