Folding Stretcher Using Nested Rods for Compact Storage
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Solution Overview
Problem
Current rescue devices, such as stretchers, are bulky, difficult to transport, and require significant storage space, making them impractical for use in small spaces and emergency situations, particularly for military patrols and Fire and Rescue services, where time and mobility are critical.
Innovation Solution
A lightweight, folding rescue device composed of rigid rods encased in tubular sleeving, with connecting elements that allow for easy assembly and disassembly, enabling compact storage and transport, and providing adequate support for spinal injuries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional rigid stretchers are used, then casualty support and stability are improved, but transportability and storage efficiency deteriorate
Solution Approach 1:
The stretcher is divided into multiple detachable rod segments that can be connected together to form the complete structure. Each rod can be independently stored, and they are assembled by connecting them in sequence, allowing the stretcher to be compact for storage yet stable when deployed
Solution Approach 2:
The rods are designed to nest within each other when not in use, with smaller rods stored inside larger ones. This nested configuration minimizes storage volume while maintaining the capability to form a stable stretcher structure when needed
2Strength
If traditional bulky stretchers are used, then structural strength is improved, but ease of transport and handling deteriorate
Solution Approach 1:
The stretcher transitions from a static bulky structure to a dynamic collapsible structure. The rods can be quickly assembled and disassembled, allowing the stretcher to adapt between a strong supportive configuration during use and a compact portable configuration during transport
Solution Approach 2:
The rods are constructed using composite materials that provide high strength-to-weight ratio, enabling the stretcher to maintain structural strength while reducing overall weight and bulk for easier transport
3Reliability
If rigid plastic cradles are used, then casualty recovery capability is improved, but cost and storage space requirements worsen
Solution Approach 1:
The cradle is segmented into multiple rod sections that can be stored in a compact, organized manner. Each segment is designed to fit within the others, reducing the overall storage footprint while maintaining the capability to form a complete recovery cradle when needed
Solution Approach 2:
The rod segments are designed to serve multiple functions - they can be configured as a cradle for sea rescue, as a scramble net, or as a land stretcher, eliminating the need for multiple specialized devices and reducing total storage requirements
Data Source
AI summary
A rescue device includes at least two parallel columns defining a core section. The columns are located in a substantially flat plane with each column lying adjacent at least one other column. Each column includes rods, a connection device, and at least one sleeve. Each rod is located within a sleeve and the rods are connectable in series by the connection devices to form a column. The rescue device further includes at least one linking element. Each sleeve is connected to at least one linking element.