Ratcheting Cinch for Shopping Cart Train Maneuverability

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Solution Overview

Problem

Existing shopping cart management systems lack an efficient method to securely and maneuverably handle trains of nested carts, particularly in maintaining control and preventing carts from straying during movement, especially around corners.

Innovation Solution

A ratcheting cinch system with a non-abrasive cart-handle coupler and tensioning assembly that securely attaches to the handles of front and rear carts, using a ratcheting member to tighten the train of carts, elevating wheels and facilitating maneuverability while preventing separation, with a release mechanism for easy deployment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional rigid attachment device is used to secure shopping carts, then the carts can be firmly held together, but the attachment device may damage or wear the cart handles

Engineering Contradiction:

Improveattachment securityVSAvoidhandle damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a soft, flexible strap as an intermediary element between the attachment device and the cart handle. The strap is made of soft material that can conform to the handle shape without causing damage, while still providing secure attachment when combined with the ratcheting mechanism. This mediator resolves the contradiction by maintaining attachment security while preventing handle damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The attachment device uses a flexible soft strap instead of a rigid attachment mechanism. The flexible nature of the strap allows it to wrap around the cart handle smoothly without creating stress concentration points or damage, while the ratcheting system provides the necessary security. This flexible approach resolves the contradiction between secure attachment and handle protection.

Inventive Principle:

Principle #30Flexible shells and thin films

2Area of stationary object

If multiple shopping carts are nested together to form a train, then space efficiency is improved, but control and maneuverability become difficult

Engineering Contradiction:

Improvespace occupationVSAvoidmaneuverability

Core Design Contradiction:

Area of stationary objectVSEase of operation

Solution Approach 1:

The patent divides the control system into separate components: individual connecting ends attached to each cart, a tensioning assembly for securing, and a release mechanism for control. This segmentation allows the system to maintain compact nested configuration while providing distributed control points that improve maneuverability. Each segment can be independently managed while contributing to overall system control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent incorporates a dynamic release mechanism that allows the connection between carts to be easily adjusted or released. This dynamic control element enables the system to transition between a secured nested state for space efficiency and a released state for improved maneuverability, resolving the contradiction between compact configuration and ease of operation.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the cart train is tightly secured to prevent separation, then safety is improved, but the wheels remain in contact with the ground reducing mobility

Engineering Contradiction:

Improvetrain stabilityVSAvoidmobility

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent uses the upward bowing force generated by the tensioned cinch system as a counteracting force to the downward weight of the carts. When the cinch is tightened, it creates upward pressure that lifts the wheels off the ground, effectively counteracting gravity's pull on the cart wheels. This anti-weight effect resolves the contradiction by providing stability through controlled lifting rather than ground contact.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The patent employs a preliminary tightening action using the ratcheting cinch mechanism before the cart train is put into motion. The cinch is tightened in advance to elevate the wheels and secure the train configuration. This preliminary action ensures that the carts are stabilized in a suspended state before movement begins, resolving the contradiction between stability and mobility by establishing the stable configuration first.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUSRE48174E1Non-abrasive secure attachment device for a multi-cart control system

Publication Date: 2020.08.25 GRIMES JUSTIN

AI summary

Apparatus and associated methods relate to a cinch for securing a train of nested shopping carts, the cinch having a non-abrasive cart-handle coupler for securely attaching the cinch to a shopping-cart handle of a front and/or rear cart of the train. In an illustrative example, the non-abrasive cart-handle coupler may include a soft loop of braid configured to latchedly circumscribe the shopping-cart handle. In an exemplary embodiment, the non-abrasive cart-handle coupler may include a latching hook having a non-abrasive handle-engagement surface. In some embodiments, the cinch may secure both a front and a rear cart of the train of nested shopping carts. In some embodiments, a ratcheting member may be used to tighten the cinch that secures the train of nested carts. When tightened, the train of carts may bow upwardly, elevating wheels attached to carts at both the front and rear ends of the train.