Portable Load Lifting System with Segmented Base and Pulley

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Solution Overview

Problem

Heavy equipment used for lifting heavy or bulky loads is often expensive and difficult to transport to and between job sites, making it impractical for many applications.

Innovation Solution

A load lifting system comprising a base assembly with a winding device, pulley assembly, and ladder handle that allows for the secure lifting and lowering of loads using a flexible line, with optional electric or manual operation, including a level-wind mechanism and directional brake for controlled movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If heavy equipment is used to lift heavy or bulky loads, then lifting capability is improved, but portability and cost are worsened

Engineering Contradiction:

Improvelifting capabilityVSAvoidportability

Core Design Contradiction:

ForceVSEase of operation

Solution Approach 1:

The system divides the lifting function into separate components: a portable base assembly with winding device, a flexible line, and a pulley assembly. This segmentation allows the lifting system to be transported in manageable parts and assembled at the job site, solving the portability problem while maintaining lifting capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a flexible line as an intermediary element between the winding device and the load. This flexible line transfers the lifting force from the portable base assembly to the load, enabling heavy lifting without requiring the entire system to be transported as a single heavy unit.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Force

If heavy equipment is used to lift heavy or bulky loads, then lifting capability is improved, but transport difficulty is worsened

Engineering Contradiction:

Improvelifting capabilityVSAvoidtransport difficulty

Core Design Contradiction:

ForceVSDevice complexity

Solution Approach 1:

The lifting system is segmented into a base assembly that can be transported separately from the pulley assembly. The base assembly containing the winding device and power source can be moved to the job site independently, then the pulley assembly is attached to create the complete lifting system, significantly reducing transport complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from a static heavy equipment configuration to a dynamic, modular configuration. The base assembly and pulley assembly can be separated for transport and reconfigured at the job site, making the system adaptable to different transport constraints while maintaining lifting capability.

Inventive Principle:

Principle #15Dynamics

3Force

If heavy equipment is used to lift heavy or bulky loads, then lifting capability is improved, but cost is worsened

Engineering Contradiction:

Improvelifting capabilityVSAvoidcost

Core Design Contradiction:

ForceVSEase of manufacture

Solution Approach 1:

The patent employs simpler, less expensive components such as a flexible line, basic pulley assembly, and portable base assembly instead of expensive heavy equipment. These components can be manufactured at lower cost while still providing the necessary lifting capability for the application.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The system replaces complex heavy mechanical equipment with a simpler mechanical system using a winding device, flexible line, and pulley. This substitution reduces manufacturing complexity and cost while maintaining the essential lifting function.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enables efficient and safe lifting and lowering of loads of various sizes and weights, reducing the need for expensive and cumbersome heavy equipment by providing a portable and versatile solution for job sites.

Implementation Method 1

The drum may have a ratchet and pawl mechanism that allows the drum to rotate in a first direction, but prevents the drum from rotating in a second, opposite direction

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

A pulley assembly may be attached to the ladder. From the drum, the flexible line may extend upward and over the pulley assembly

Methodology Applied

Scientific EffectPulley: Pulley

Implementation Method 3

The drum may have a ratchet and pawl mechanism that allows the drum to rotate in a first direction, but prevents the drum from rotating in a second, opposite direction

Methodology Applied

Scientific EffectRatchet: Ratchet