Breakaway Cable Attachment With Shear Release for Utility Poles

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Solution Overview

Problem

Existing cable attachment systems to utility poles are prone to damage when objects fall on the cables, leading to costly and time-consuming repairs or replacements.

Innovation Solution

A breakaway cable attachment system comprising a rail, bracket, and clamp that detaches from the utility pole when a predetermined load is applied, using shear bolts or a spring-loaded washer to prevent damage by releasing the cable.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If existing clamp systems are used to securely attach utility cables to utility poles, then the cable attachment strength is improved, but the damage risk to utility poles and cables increases when objects fall on the cables

Engineering Contradiction:

Improvecable attachment strengthVSAvoiddamage risk from falling objects

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The attachment system is divided into multiple components (clamp, bracket, rail, shear bolts) that can independently fail. The shear bolts are designed as weak links that break at predetermined loads, segmenting the failure mode so that only the bolts fail while the main cable and pole remain intact.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Shear bolts act as intermediary elements between the clamp/bracket assembly and the utility pole. These bolts are specifically designed to fail first under excessive load, serving as a protective mediator that sacrifices itself to prevent direct force transmission to the pole and cable.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If existing clamp systems are designed to securely support the weight of utility cables and messenger cables, then the support reliability is improved, but the repair cost and time increase when damage occurs

Engineering Contradiction:

Improvesupport reliabilityVSAvoidrepair cost and time

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The shear bolts are designed as disposable, low-cost components that are intended to fail and be replaced. By making the sacrificial element inexpensive and easy to replace, the system ensures that repair costs and time are minimized when falling objects cause excessive loads.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The system segments the attachment into replaceable components (shear bolts, brackets, rails). When damage occurs, only the failed shear bolts need replacement rather than the entire attachment system, significantly reducing repair complexity and cost.

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If a breakaway mechanism with shear bolts is implemented, then the protection against falling object damage is improved, but the device complexity increases

Engineering Contradiction:

Improveprotection against falling object damageVSAvoidattachment system complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The breakaway functionality is localized to specific components (shear bolts at critical connection points) rather than requiring a completely complex breakaway mechanism throughout the entire attachment system. This localized approach provides protection while minimizing overall system complexity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The breakaway function is extracted into separate, dedicated shear bolt components rather than being integrated into the main clamp or bracket structures. This separation simplifies the design by making the failure mechanism independent and modular.

Inventive Principle:

Principle #2Taking out (Extraction)

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

Reduces the likelihood of damage to the utility pole and cable by detaching the cable before significant force is applied, thereby minimizing repair and replacement costs.

Implementation Method 1

The rail can be attached to the utility pole by a shear bolt configured to break when the predetermined load is applied to the cable

Methodology Applied

Scientific EffectShear stress: Shear Stress

Implementation Method 2

The clamp can include a spring that can be configured to deform when the predetermined load is applied to the cable such that the clamp can be opened to release the cable

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS20260071697A1Breakaway cable attachment systems

Publication Date: 2026.03.12 OSMOSE UTILITIES SERVICES

AI summary

The disclosed technology includes a breakaway cable attachment system for attaching a cable to a utility pole. The breakaway cable attachment system can include a rail, a bracket, and a clamp. The rail can be attachable to a utility pole and have a base and two sidewalls extending outwardly from the base and forming a slot. The bracket can have an attachment portion and a mounting portion that extends at an angle away from the attachment portion. The mounting portion can be configured to extend at least partially into the slot of the rail for attachment to the rail. The clamp can be attachable to the attachment portion and receive and support a cable. The breakaway cable attachment system can be configured to prevent damage to the utility pole and/or the cable when a predetermined load is applied to the cable by detaching the cable from the utility pole.