Hammock Shell System with Adjustable Dead Air Insulation
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Solution Overview
Problem
Current hammock insulation solutions are bulky, heavy, and ineffective due to compression by user weight, and existing systems for rain protection and insulation are cumbersome and inefficient.
Innovation Solution
A Hammock Shell System comprising a tubular shell supported by a tension line that drapes over the hammock, creating an adjustable insulating dead air layer, which can be filled with insulating material and made waterproof for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If insulating material is added to the hammock to provide warmth, then insulation effectiveness is improved, but weight and bulk increase significantly
Solution Approach 1:
The patent introduces an underquilt as an intermediary component between the hammock and the ground. This underquilt creates an insulating air layer that prevents heat transfer from the hammock to the cold ground, thereby improving warmth without requiring heavy insulation material in the hammock itself.
Solution Approach 2:
The underquilt combines lightweight insulating materials with a structured design that incorporates air pockets and reflective surfaces. This composite approach maximizes insulation effectiveness while minimizing weight and bulk compared to traditional heavy quilts.
2Temperature
If sufficient insulation material is added to counteract compression, then insulation effectiveness is improved, but the hammock becomes heavy and clunky
Solution Approach 1:
The underquilt uses flexible, thin-walled structures that maintain their insulating air pockets while remaining lightweight and packable. The thin film construction allows the insulation to conform to the user's body without adding significant weight or bulk.
Solution Approach 2:
The patent employs materials and structures that change their physical parameters - the insulating air pockets expand when in use to provide warmth, but compress into a small package when not in use. This parameter change allows effective insulation during use while maintaining portability.
3Temperature
If a pad is used for insulation under the user, then some insulation benefit is provided, but the pad becomes heavy and difficult to pack
Solution Approach 1:
The underquilt is designed with dynamic characteristics - it expands and provides insulation when in use, but compresses easily into a small pack when not in use. The flexible construction allows it to adapt to different packing conditions while maintaining insulation effectiveness during use.
4Temperature
If structural components are added to prevent compression, then insulation effectiveness is improved, but weight and bulk increase
Solution Approach 1:
Instead of rigid structural components, the underquilt uses flexible thin-walled structures that maintain their insulating air pockets through intelligent design rather than heavy reinforcement. The flexible construction prevents compression while remaining lightweight.
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 system provides lightweight, adjustable, and effective insulation that maintains warmth by creating a dead air layer, reducing weight and bulk while allowing for easy use and adjustment, while also offering rain protection.
Implementation Method 1
creating an insulating dead air layer between the shell and the bottom of the hammock
Implementation Method 2
The shell may be reflective to improve insulating properties
Data Source
AI summary
A hammock shell system may comprise a hammock, a tension line, and a shell. The tension line may be secured to run above the hammock, and along the length of the hammock. The shell may be a tubular piece of fabric with openings at either end, and shaped to generally hang over the tension line, and fit around and envelop the hammock. The shell may drape over the edges of the two sides of the hammock and hang under the bottom of the hammock. When the two openings at the ends of the shell are closed, a layer of dead air is created between the shell and the bottom of the hammock. This dead air space insulates the bottom of the hammock. A shape adjustment system, comprising cinch cords on the inside of the shell, allows for tightening or loosening to adjust the shape and volume of the dead air space trapped between the bottom of the hammock and the shell. Such shape adjustment allows for customizing insulation properties and the temperature of the hammock. The shell may also include insulating materials.