Integrated Grab and Sling Hook for Safer Heavy Lifting

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Solution Overview

Problem

Existing hooks for lifting and securing heavy objects, such as grab and sling hooks, require multiple types due to differences in design and functionality, leading to inefficiencies and ergonomic issues.

Innovation Solution

A dual hook device combining a grab hook and a sling hook aligned linearly, allowing for a single device to serve both functions and providing ergonomic handling by using the inactive hook as a handle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple types of hooks (grab hooks and sling hooks) are used to cover all lifting situations, then versatility is improved, but device complexity and inventory requirements worsen

Engineering Contradiction:

ImproveversatilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines a grab hook and a sling hook into a single integrated device. The grab hook portion provides the narrow throat opening for choking onto chains and ropes, while the sling hook portion provides the open bowl design with a retainer latch. This merging eliminates the need to carry multiple separate hooks, reducing inventory complexity while maintaining full versatility for all lifting situations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The dual hook device is designed to perform multiple functions within a single structure. The first hook (grab hook type) is optimized for choking onto chains and ropes, while the second hook (sling hook type) is optimized for overhead lifting with retainer latch security. This multi-functionality allows a single device to replace what previously required two separate tools.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a retainer latch is added to a grab hook to improve safety, then reliability is improved, but the grab hook loses its ability to serve as an ergonomic handle

Engineering Contradiction:

ImprovesafetyVSAvoidergonomic handle functionality

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The device is segmented into two distinct functional portions: a grab hook portion without a retainer latch that can serve as an ergonomic handle, and a sling hook portion with a retainer latch that provides enhanced safety for overhead lifting. This segmentation allows each portion to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If the throat opening of a grab hook is made narrow to improve its grabbing capability, then the grabbing function is improved, but the risk of finger entanglement increases

Engineering Contradiction:

Improvegrabbing capabilityVSAvoidfinger entanglement risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The dual hook device segments the grabbing function into two portions: the grab hook with its narrow throat opening optimized for choking onto chains and ropes, and the sling hook with its wider open bowl design that reduces finger entanglement risk while still providing effective grabbing capability. Users can select the appropriate portion based on the specific task.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12618431B2Dual hook

Publication Date: 2026.05.05 ATTEBERRY WADE

AI summary

A dual hook device having both a grab hook and a sling hook connected to form one device for hooking chains, ropes, and cables and is capable of lifting heavy objects.