Power Tool Sensing Outlet With Vacuum Run-On Debris Cleanup

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Solution Overview

Problem

Conventional industrial shop vacuums lack a reliable mechanism to ensure simultaneous operation of the vacuum and power tool, leading to potential unplugging of the power tool from the onboard power outlet, which can result in incomplete cleanup of debris.

Innovation Solution

A vacuum electronic power tool sense system that includes a controller to detect the operation of a power tool plugged into a housing-mounted power outlet, activating the vacuum source for synchronized operation and extending vacuum operation after the power tool is turned off to allow for additional debris collection, along with a door mechanism to prevent accidental unplugging of the power tool.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the power tool is plugged into the onboard power outlet of the vacuum, then the user can operate both the vacuum and power tool with a single power cord, but the power tool may be inadvertently unplugged from the power outlet

Engineering Contradiction:
Improvesingle power cord operationVSAvoidpower tool connection stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The door is positioned to automatically cover the power outlet and receive the power cord before the plug can be inadvertently pulled out. This preliminary protective action prevents the harmful unplugging event from occurring in the first place

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The door acts as a protective barrier that cushions against accidental unplugging. By having the door in place before any unplugging attempt, it prevents the direct contact between the power cord and external forces that could cause inadvertent disconnection

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

2Loss of energy

If the vacuum operates only during power tool use, then energy is conserved, but debris cleanup is incomplete when the power tool is turned off suddenly

Engineering Contradiction:
Improvevacuum energy consumptionVSAvoiddebris cleanup completeness
Core Design Contradiction:
Loss of energyVSReliability

Solution Approach 1:

The controller is programmed to detect when the power tool is turned off and automatically extend the vacuum operation for a predetermined delay period. This preliminary extended operation ensures that any remaining debris is cleaned up before the vacuum shuts down, preventing incomplete cleanup

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The vacuum operation continues uninterrupted for a predetermined delay period after the power tool is turned off. This continuity ensures that the useful cleaning action is completed even after the power tool stops, preventing sudden termination of the cleanup process

Inventive Principle:
Principle #20Continuity of useful action

3Reliability

If the vacuum automatically operates when a power tool is detected, then simultaneous operation is ensured, but the system complexity increases with sensing and control mechanisms

Engineering Contradiction:
Improvesimultaneous operation assuranceVSAvoidsensing and control system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The controller continuously monitors the power outlet to detect when a power tool is plugged in or turned on. This feedback mechanism automatically triggers the vacuum operation, ensuring simultaneous operation without requiring complex manual coordination or sophisticated control algorithms

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS8015657B2Vacuum electronic power tool sense
Publication Date: 2011.09.13 BLACK & DECKER CORP
  • US8015657B2 patent drawing
  • US8015657B2 patent drawing
  • US8015657B2 patent drawing

AI summary

A vacuum electronic power tool sense system senses the operation of a power tool that is plugged into an onboard power outlet and the vacuum source is automatically operated to facilitate user clean-up of debris generated by use of the power tool. A delay period can be utilized to maintain the vacuum source is an on state for a predetermined period of time after the power tool is turned off.