T-Shaped Wire Pulling Device Using Venturi Effect

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Solution Overview

Problem

Existing methods for pulling electrical cords through conduits, particularly in in-ground swimming pools, spas, and fountains, are inefficient and require multiple workers and the use of wire lubricants, necessitating a faster and easier approach.

Innovation Solution

An electrical wire pulling device utilizing a T-shaped hollow body with a constrictor and a fluid source to create a pressure differential, combined with a pulling line and lubricant supply, facilitates efficient cord pulling through conduits by leveraging the venturi effect to draw the pulling line and lubricant into the conduit.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional fish tape and manual methods are used to pull cord through conduit, then the process can be completed, but it requires multiple workers and takes significant time

Engineering Contradiction:

Improvecord pulling speedVSAvoidinstallation time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies pneumatic principles by using compressed air to create pressure differential that draws the pulling line through the conduit. The air pressure system replaces manual pulling methods, enabling single-operator deployment and significantly reducing installation time while maintaining effective cord pulling capability through long conduit runs

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The patent replaces the traditional mechanical manual pulling system (fish tape, multiple workers physically pulling) with a pneumatic system that uses compressed air pressure differential. This substitution eliminates the need for multiple workers and reduces installation time while achieving the same functional result of drawing cord through conduit

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If manual cord pulling methods are used, then the process can be completed, but it requires multiple workers and complex coordination

Engineering Contradiction:

Improveoperational simplicityVSAvoidnumber of workers required

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The pneumatic cord pulling system is designed to be self-service in nature, where the compressed air automatically creates the pressure differential needed to draw the pulling line through the conduit. The system eliminates the need for multiple workers to coordinate manual pulling, reducing operational complexity to a single operator controlling the air pressure

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

By introducing a pneumatic system using compressed air, the patent simplifies the operational process from requiring multiple coordinated workers to a single operator controlling air pressure. The pneumatic mechanism automatically handles the complex coordination previously required among multiple workers

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 device significantly reduces the effort required to pull electrical wires through long conduits, ensuring faster and more efficient installation by creating a vacuum effect that draws the pulling line and lubricant, thereby simplifying the process and reducing the need for multiple workers.

Implementation Method 1

create a pressure differential that draws the pulling line from the pulling line source towards the bottom outlet and into the conduit

Methodology Applied

Scientific EffectPressure differential: Pressure Gradient

Implementation Method 2

The constrictor has a tapered section, adjacent the side inlet, and tapering in a direction towards the bottom inlet

Methodology Applied

Scientific EffectVenturi effect: Venturi Effect

Data Source

PatentUS11552461B2Device, system and related methods for pulling electrical cords through conduit

Publication Date: 2023.01.10 LUKE GELL POOLS LLC

AI summary

An electrical wire pulling device is for pulling wire through a conduit and includes a T-shaped hollow body including a side inlet transversely intersecting a path between a top inlet and a bottom outlet, and a constrictor adjacent the side inlet. A pulling line source, including a supply of pulling line, is positioned adjacent the top inlet and configured to supply the pulling line into the top inlet and out the bottom outlet. A constrictor has a tapered section tapering towards the bottom inlet. The bottom outlet is positioned adjacent the first end of the conduit. The side inlet is coupled to a fluid source to supply a fluid into the hollow body to be pushed downward towards the bottom outlet and create a pressure differential that draws the pulling line towards the bottom outlet and into the conduit.