Inflatable Liferaft Seating Arrangements for Stability and Capacity

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Solution Overview

Problem

Conventional inflatable liferafts face challenges in accommodating a large number of passengers due to space constraints on ships, and they lack structured seating arrangements, leading to uneven load distribution and reduced stability.

Innovation Solution

The implementation of multiple seating arrangements within the ring-shaped area of the liferaft, which are inflatable and designed to guide passengers into optimal seating positions, providing support and stability, and allowing for increased capacity while minimizing exposure to movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple seating arrangements are arranged in the ring-shaped area, then the capacity of the liferaft is increased and persons can be seated more efficiently, but the device complexity increases due to additional structural components

Engineering Contradiction:

ImprovecapacityVSAvoiddevice complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The seating arrangements are merged with the inflatable tube structure, where the outer inflatable floatation tube serves dual purposes as both flotation device and backrest for the seating arrangements. This integration reduces the number of separate components needed while maintaining increased seating capacity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The inflatable tube is designed to perform multiple functions: providing flotation, forming the structural boundary of the ring-shaped area, and serving as a backrest for the seating arrangements. This multi-functionality allows the liferaft to accommodate more persons without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If seating arrangements are added to guide persons to correct seating positions, then the stability and load distribution are improved, but the ease of operation decreases due to more complex seating structure

Engineering Contradiction:

ImprovestabilityVSAvoidease of operation

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The seating arrangements with backrests provide self-guiding functionality where the structure itself indicates the correct seating position and orientation. Persons are naturally guided to sit in the intended positions without requiring external instructions, thereby improving stability while maintaining ease of operation.

Inventive Principle:

Principle #25Self-service

3Ease of operation

If the seating arrangements are inflatable with predetermined pressure, then comfort and isolation are improved, but the device complexity increases due to additional inflation systems

Engineering Contradiction:

ImprovecomfortVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The seating arrangements utilize the same inflation system as the flotation tube, merging the inflation functions. The outer inflatable floatation tube and the seating arrangements share the inflation mechanism, reducing the number of separate inflation systems needed while providing comfortable, isolated seating.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The inflation system serves dual purposes by inflating both the flotation tube for buoyancy and the seating arrangements for comfort and isolation. This universal inflation system reduces device complexity while achieving the comfort benefits of inflatable seating.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Quantity of substance

If the seating arrangements extend across the ring-shaped area, then the area utilization is optimized and capacity increases, but the ease of manufacture decreases due to more complex arrangement configuration

Engineering Contradiction:

ImprovecapacityVSAvoidease of manufacture

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The seating arrangements are divided into multiple segments or sections that can be manufactured separately and then assembled within the ring-shaped area. This segmentation allows for simpler manufacturing of individual components while achieving optimized area utilization when assembled together.

Inventive Principle:

Principle #1Segmentation

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

This solution enhances the capacity of liferafts, reduces the number of liferafts needed on ships, improves passenger safety and comfort, and provides thermal insulation against hypothermia, while maintaining structural integrity and efficient use of space.

Implementation Method 1

at least one inflatable flotation tube (2), said inflatable tube extending circumferentially for providing a substantially ring-shaped area (3)

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

provides thermal insulation against hypothermia

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentEP2271549B1Inflatable liferaft with seats

Publication Date: 2014.03.05 VIKING LIFE SAVING EQUIP

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AI summary

The present invention relates to an inflatable liferaft comprising at least one inflatable flotation tube, said inflatable tube extending circumferentially for providing a substantially ring-shaped area, and a bottom element which is adapted to provide a bottom to the substantially ring-shaped area. Furthermore, at least two seating arrangements are arranged in the ring-shaped area.