Power Tool Activation Locking via RFID and NFC Purchase Verification

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Solution Overview

Problem

The theft of battery-powered power tools has increased due to their compact size and ease of use, posing a significant challenge for retailers.

Innovation Solution

A system is implemented to lock battery-powered power tools throughout the supply chain until legitimate purchase is verified, using out-of-band techniques such as RFID tags and NFC for communication, and generating unique locking and unlocking codes based on tool-specific information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If power tools are made compact and portable, then ease of operation and user convenience are improved, but susceptibility to theft increases

Engineering Contradiction:
Improveease of useVSAvoidtheft risk
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary locking of the power tool before purchase completion. The locking mechanism is activated in advance during the shopping experience, and the tool remains locked until the purchase is verified and completed at the point of sale, preventing theft while maintaining ease of operation for legitimate customers.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

An electronic locking mechanism serves as an intermediary between the power tool and the user. This mediator controls access to the tool based on purchase verification status, allowing easy operation for authorized users while preventing unauthorized access through theft.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If locking mechanisms are implemented to prevent theft, then loss prevention is improved, but device complexity increases

Engineering Contradiction:
Improvetheft preventionVSAvoidsystem complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The electronic locking mechanism integrates multiple functions into a single system: it provides theft prevention through locking, enables purchase verification through communication with the point of sale system, and offers user interface for code entry. This multi-functionality reduces the need for separate systems and minimizes overall complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The power tool's locking and unlocking system is self-contained, with the locking mechanism integrated into the tool itself and the unlocking capability provided through a user-accessible code entry interface. This self-service approach eliminates the need for external locking devices or complex external control systems.

Inventive Principle:
Principle #25Self-service

3Object-affected harmful factors

If purchase verification systems are implemented, then theft reduction is improved, but ease of operation deteriorates due to additional verification steps

Engineering Contradiction:
Improvetheft reductionVSAvoidoperational convenience
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The system replaces manual verification processes with electronic communication between the point of sale system and the power tool. The automatic electronic verification eliminates the need for manual checking procedures, reducing the burden on users while maintaining theft reduction effectiveness.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The purchase verification is automatically performed by the system without requiring active user participation beyond initial code entry. The verification process is initiated and completed in the background, minimizing the time and effort users must spend on verification steps.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP4078549B1Out-of-band point of sale activation for electronic power tool devices
Publication Date: 2026.02.04 MILWAUKEE ELECTRIC TOOL CORP
  • EP4078549B1 patent drawingFigure 1
  • EP4078549B1 patent drawingFigure 2
  • EP4078549B1 patent drawingFigure 3

AI summary

An electronic power tool device includes an electronic processor, a communication interface in communication with the electronic processor, and a wake-up sensor configured to generate a wake signal for activating the communication interface and the electronic processor responsive to a stimulus. The communication interface is configured to receive a first electronic message that includes an activation state and transmit the first received electronic message to the electronic processor. The electronic processor is configured to control the activation state of the electronic power tool device to allow or prevent operation of the electronic power tool device based on the first received electronic message.