Dust Extractor Collar With Pivotal Cover for Debris Clearance

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Solution Overview

Problem

Existing dust extractor systems for drills and hammer drills lack an efficient method for drilling and cleaning holes while maintaining effective debris removal and suction, often resulting in incomplete dust extraction and potential debris entry into the system.

Innovation Solution

A collar system with a frusto-conical hole design, a conical funnel, and a pivotal cover that allows for easy access and cleaning, combined with a suction mechanism using a venturi effect and multiple apertures for enhanced debris clearance and suction control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dust extractor is attached to a drill or hammer drill, then dust extraction is enabled, but debris may enter the system and suction efficiency decreases

Engineering Contradiction:

Improvedebris removal effectivenessVSAvoiddebris entry into system

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The collar is divided into an outer ring and an inner section that can rotate relative to each other. The inner section contains cleaning apertures that are initially blocked by the outer ring's protrusions, separating the drilling function from the cleaning function. This segmentation prevents debris from entering the suction passage while enabling effective cleaning when needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary cleaning action by rotating the inner section to align cleaning apertures with the hole, allowing compressed air to clear debris before it can enter the suction system. This preliminary action prevents the harmful effect of debris contamination.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If a collar with drill passage is used, then drilling is enabled, but debris accumulates and blocks the passage

Engineering Contradiction:

Improvedrilling capabilityVSAvoiddebris accumulation

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The collar enables continuous operation by integrating a rotation mechanism that periodically aligns cleaning apertures with the drill passage. This continuous cleaning action prevents debris accumulation and blockages, maintaining uninterrupted drilling capability.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The inner section rotates periodically to bring cleaning apertures into alignment with the drill passage at regular intervals. This periodic action clears debris before it can accumulate and block the passage, ensuring continuous drilling operation.

Inventive Principle:

Principle #19Periodic action

3Reliability

If multiple apertures are added for cleaning, then debris clearance is enhanced, but device complexity increases

Engineering Contradiction:

Improvedebris clearance efficiencyVSAvoidcollar structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The inner section serves multiple functions: it acts as a seal against the work surface, provides rotating cleaning apertures, and controls the timing of debris removal. This multi-functionality achieves enhanced debris clearance without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The cleaning function is merged with the collar structure itself rather than being a separate component. The inner section integrates sealing surfaces, cleaning apertures, and rotation mechanism into a single component, reducing overall system complexity while maintaining effective debris clearance.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively drills and cleans holes by ensuring complete debris removal and maintaining suction, reducing the risk of debris entry and improving overall cleaning efficiency.

Implementation Method 1

Methodology Applied

Scientific EffectVenturi effect: Venturi Effect

Data Source

PatentEP3760373B1Collar system for a dust extractor

Publication Date: 2023.06.28 BLACK & DECKER CORP

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AI summary

A collar system for a dust extractor comprising: a collar (12) which comprises a drill passage (18) which extends through the collar and an extension (700) which forms an internal passage (702) which connects at one end with the drill passage (18), the extension (700) being capable of attaching to the housing of a dust extractor to enable the internal passage (702 to connect to a suction passage of the dust extractor; characterized in that there is provided a moveable cover (724) mounted adjacent an entrance of the drill passage (18) which is capable of being moved between a first position where it covers the entrance and a second position where is remote from the entrance, wherein the cover comprises at least hole (730) which passes through the cover (724).