Internal-Frame Backpack Load Sling for Extra Carry Capacity

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Solution Overview

Problem

Existing backpack designs, particularly those with internal frames, struggle to efficiently carry additional loads such as harvested game meat or other bulky items alongside the main bag.

Innovation Solution

A backpack assembly with an internal frame and a load sling configured to support additional loads, featuring a flexible fabric panel and adjustable strap assemblies for securing and carrying items like game bags.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an external frame is used to carry additional loads, then the carrying capacity is improved, but the backpack becomes bulky and less portable

Engineering Contradiction:

Improvecarrying capacityVSAvoidbackpack size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The backpack is divided into two functional segments: the main bag for personal items and a separate load sling system for additional loads. This segmentation allows the backpack to maintain a compact form when the load sling is not in use, while providing extended carrying capacity when needed. The load sling can be attached to or detached from the main bag, enabling versatile configuration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The load sling is designed to nest within or alongside the main bag when not in use, rather than adding external bulk. The sling can be stored within the backpack structure itself, allowing the additional carrying capacity to be integrated into the existing volume without significantly increasing the overall backpack size.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Volume of moving object

If an internal frame is used, then the backpack is more compact, but the ability to carry additional loads is reduced

Engineering Contradiction:

Improvebackpack sizeVSAvoidcarrying capacity

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

The backpack system is designed to perform multiple functions: the main bag handles personal items, while the load sling system provides additional carrying capacity for external loads. This multi-functionality allows an internally-framed backpack to achieve both compactness and extended carrying capacity, as the load sling can be configured to accommodate various load types and weights without requiring a bulky external frame.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The load sling incorporates adjustable straps and flexible positioning mechanisms that allow it to adapt to different load configurations. This dynamic design enables the sling to optimize its carrying capacity for various scenarios while maintaining a compact form when idle, bridging the gap between compactness and versatility.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If a load sling is added to the backpack, then the versatility is improved, but the device complexity increases

Engineering Contradiction:

Improvecarrying capacityVSAvoidbackpack structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The load sling is merged with the main bag through integrated attachment points and streamlined design elements. Rather than being a completely separate system, the load sling utilizes existing backpack components such as straps, buckles, and structural elements, thereby reducing overall complexity while still providing enhanced versatility and carrying capacity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12495885B2Backpack assembly with load sling

Publication Date: 2025.12.16 EBERLESTOCK USA LLC

AI summary

A backpack assembly includes: a main bag; and a load sling coupled with the main bag and configured for supporting a load.