Shopping Cart Handle Sterilization via Wheel-Generated Voltage

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Solution Overview

Problem

Retail store fixtures such as shelves, cold storage devices, and shopping carts are difficult to maintain as sterile and bacteria-free, requiring extensive employee time and resources for cleaning and sanitizing due to frequent human contact.

Innovation Solution

Integration of an electric charge circuit within retail store fixtures that generates a positive electric charge through movable parts, such as wheels or doors, to repel bacteria without the need for chemicals or external power, using voltage generators and capacitors to sterilize surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional cleaning and sanitizing methods are used on retail store fixtures, then fixtures can be sterilized, but extensive employee time and resources are required

Engineering Contradiction:
Improvesterilization effectivenessVSAvoidemployee cleaning time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical cleaning processes with an electrical field-based sterilization system. The fixture incorporates an electric charge circuit that generates positive ions to neutralize and repel bacteria, eliminating the need for employees to physically clean and sanitize surfaces.

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

Solution Approach 2:

The fixture performs sterilization automatically through its integrated electric charge circuit. When activated, the system self-sterilizes by generating positive charges that repel bacteria, reducing dependence on external human intervention for maintenance.

Inventive Principle:
Principle #25Self-service

2Reliability

If traditional cleaning methods are used on retail store fixtures, then fixtures can be sanitized, but high costs are incurred for chemicals and labor

Engineering Contradiction:
Improvesanitization effectivenessVSAvoidcleaning chemicals and resources
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The patent substitutes chemical-based sanitization with an electrical field approach. The electric charge circuit generates positive ions that naturally repel and neutralize bacteria without requiring chemical cleaners, thereby eliminating the need for cleaning substances and associated costs.

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

3Object-affected harmful factors

If retail store fixtures are frequently cleaned and sanitized, then bacterial contamination is prevented, but employee hours and operational costs increase

Engineering Contradiction:
Improvebacterial contaminationVSAvoidoperational efficiency
Core Design Contradiction:
Object-affected harmful factorsVSProductivity

Solution Approach 1:

The fixture autonomously maintains sterility through its electric charge circuit, which continuously or periodically generates positive charges to repel bacteria. This self-sterilizing capability eliminates the need for repeated manual cleaning interventions, allowing employees to focus on productive tasks rather than maintenance.

Inventive Principle:
Principle #25Self-service

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 electric charge circuit efficiently sterilizes retail store fixtures by repelling bacteria, reducing the time and cost associated with traditional cleaning methods, while maintaining a safe environment for users by preventing bacterial transmission.

Implementation Method 1

a voltage generator that generates a voltage in response to a motion of a moveable portion of the retail store fixture

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a capacitor that stores the voltage generated by the voltage generator

Methodology Applied
Scientific EffectCapacitance: Capacitance

Implementation Method 3

The positive electric charge repels bacteria, sterilizing the portion receiving the electric charge

Methodology Applied
Scientific EffectElectrostatic repulsion: Ion Repulsion/Attraction

Data Source

PatentUS10300157B2Retail store fixture and method of sterilizing a retail store fixture
Publication Date: 2019.05.28 WALMART APOLLO LLC
  • US10300157B2 patent drawing
  • US10300157B2 patent drawing
  • US10300157B2 patent drawing

AI summary

Described is a retail store fixture that includes an electric charge circuit. The electric charge circuit generates a positive electric charge, or voltage, in response to the motion of a moveable portion of the retail store fixture. The retail store fixture can be a shopping cart or other fixture with a moveable portion. The positive electric charge is deposited on a part of the retail store fixture that it is desired to sterilize. The positive electric charge repels bacteria, sterilizing the portion of the retail store fixture that receives the positive charge. A shopping cart, for example, equipped with the electric charge circuit can be sterilized without requiring chemicals or power to be supplied to the cart. Rotation of the shopping cart wheels can be used to generate the voltage. The voltage can be used to sterilize a shopping cart handle, and/or other parts of the shopping cart.