Cargo Corner Protector with Cable Retention Fingers

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Solution Overview

Problem

Existing corner protectors for cargo, such as lumber, on railroad freight cars are either difficult to install and remove without damaging the cargo or wear down the tie-down cables, leading to inefficiencies and potential damage.

Innovation Solution

A corner protector with cable retention fingers on a sidewall surface that captures and retains the tie-down cable, allowing for easy installation without disconnecting the cable and minimizing wear on both the cable and the cargo.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If steel protectors are used to protect cargo corners, then the cargo is protected from indentations and fraying, but the tie-down cables wear down due to friction with the steel protector

Engineering Contradiction:

Improvecargo corner protectionVSAvoidcable wear

Core Design Contradiction:

Object-affected harmful factorsVSLoss of substance

Solution Approach 1:

The protector combines a rigid outer shell made of protective material (steel or polymer) with a flexible inner liner made of non-abrasive material such as rubber, foam, or plastic. This composite structure provides corner protection while the soft inner surface prevents cable wear by reducing friction between the cable and protector.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional protectors with closed eyes are used to receive cables, then the cables are retained, but the installation process becomes complex requiring threading the cable through the eye

Engineering Contradiction:

Improvecable retentionVSAvoidinstallation ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The single closed eye structure is segmented into multiple cable retention features distributed around the protector perimeter. These features include open slots, gaps between protrusions, or multiple smaller openings that allow cables to be easily positioned and retained without threading through a closed loop, significantly simplifying installation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of requiring the cable to pass through a closed eye (cable inside out), the design allows the cable to remain outside while still being retained by the protector structure. The cable is positioned against the outer surface and held in place by retention features, eliminating the need to thread the cable through an opening.

Inventive Principle:

Principle #13The other way round (Inversion)

3Stability of the object's composition

If tie-down cables are tied down tightly to prevent cargo movement, then cargo stability is improved, but the cable causes indentations in the lumber corners

Engineering Contradiction:

Improvecargo stabilityVSAvoidcorner indentation

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The protector is installed on the cargo corner before the tie-down cable is applied. The protective material (especially the flexible inner liner) acts as a cushion that absorbs and distributes the concentrated cable pressure over a larger area, preventing indentations and fraying while still allowing the cable to apply sufficient force for cargo stability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Object-affected harmful factors

If tie-down cables are not tied down tightly to avoid cargo damage, then cargo corners are protected from indentations, but the cables and lumber become frayed due to movement

Engineering Contradiction:

Improvecorner protectionVSAvoidcargo security

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20250115406A1Corner protector for protecting the top corners of stacks of lumber and cargo

Publication Date: 2025.04.10 PENNSY CORP

AI summary

A corner protector for protecting the top corners of stacks of lumber or other cargo from being indented or frayed by tie-down cables in a railroad freight car, having a sidewall connected at its top to a top wall so that the sidewall is adapted to contact the side of a stack of lumber or other cargo and the top wall is adapted to contact the top of the stack of lumber, cable retention fingers mounted on the sidewall for capturing and detaining the tie-down cable, whereby when the protector is mounted on the corner of a stack of lumber it is protected against being contacted and indented by the tie-down cable, the corner protector may be installed without disconnecting the cable by loosening the cable and inserting the protector under the cable and mounting the protector on the top corner of the stack of lumber.