Retention Strap Assembly for Equipment Bag Lifting Lug Grip

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Solution Overview

Problem

Conventional equipment transport bags for leaking or non-performing electrical equipment, such as transformers, face issues with slippage of lifting loops, leading to potential spillage and failure in containing contaminants due to lack of tension or stress, especially when the equipment is set down.

Innovation Solution

An equipment transport bag system with a retention assembly that includes a bag assembly and a lifting strap unit, where the retention assembly releasably retains the lifting strap unit in an engaged configuration, maintaining the relative positioning of the lifting elements and preventing slippage during transportation and storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If lifting loops are used to engage lifting elements, then equipment can be lifted and transported, but the lifting loops may slip off the lifting elements when tension is absent or low

Engineering Contradiction:

Improvelifting and transporting equipmentVSAvoidretention of lifting loops on lifting elements

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The lifting strap is configured to transition between a first configuration during lifting where it engages the lifting element, and a second configuration during storage where the retention mechanism maintains engagement. The system dynamically adapts to different operational states (lifting vs. storage) while maintaining secure engagement throughout.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

A retention mechanism acts as an intermediary component between the lifting strap and lifting element. This intermediary provides additional retention force through features such as cam arms, retention lips, or friction surfaces that prevent the lifting strap from slipping off the lifting element when lifting tension is absent or low.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If tension is absent or low in lifting loops, then equipment can be set down, but slippage occurs resulting in falling of the bag

Engineering Contradiction:

Improvesetting down equipmentVSAvoidprevention of bag slippage and falling

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The retention mechanism applies preliminary anti-action by providing continuous retention force on the lifting strap even when lifting tension is absent or low. Features such as cam arms positioned to engage retention lips, or friction surfaces designed to maintain grip, prevent the lifting strap from slipping off the lifting element during the vulnerable period when equipment is set down and lifting tension is removed.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system dynamically maintains engagement through the retention mechanism that adapts to different load conditions. During lifting, the primary engagement force comes from lifting tension; during storage or when set down, the retention mechanism provides the necessary holding force to prevent slippage, creating a dynamic system that maintains reliability across varying operational states.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If lifting strap tension is low, then equipment handling is easier, but the lifting strap may slip off causing contaminant spillage

Engineering Contradiction:

Improveequipment handling flexibilityVSAvoidcontaminant spillage from bag

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The retention mechanism serves as an intermediary that ensures continuous engagement of the lifting strap with the lifting element regardless of lifting tension levels. By providing additional retention through cam arms, retention lips, or friction surfaces, it prevents the lifting strap from slipping off the lifting element, thereby preventing bag displacement and contaminant spillage while maintaining ease of operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The retention mechanism converts the potentially harmful condition of low or absent lifting tension into a benign state by providing alternative retention forces. Instead of allowing slippage to occur when tension is low, the retention features (cam arms engaging retention lips, friction surfaces) actively prevent slippage, transforming a vulnerable condition into a secure state and preventing contaminant release.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20260042598A1Strap for retaining equipment transport bag on equipment lifting lugs

Publication Date: 2026.02.12 ANDAX IND LLC

AI summary

An equipment transport bag assembly is operable to handle equipment having a lifting element. The bag system includes a bag assembly and a retention assembly. The bag assembly includes a bag defining an interior configured to at least in part receive the equipment therein when the bag is in a receiving position. The bag assembly further includes a lifting strap unit secured relative to the bag and defining an element-receiving opening. The lifting element is at least in part received by the element-receiving opening when the bag is in the receiving position and the lifting strap unit is in an engaged configuration. The retention assembly releasably retains the lifting strap unit in the engaged configuration.