Inflatable Thermal Blanket with Collapsible Retainer

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Solution Overview

Problem

Conventional thermal blankets require preparation for use, such as careful placement relative to a fluid collection tray, and their design prevents them from being folded flat for storage, leading to increased packaging and shipping space requirements.

Innovation Solution

A low-profile thermal blanket design with a retainer mechanism at the input port that allows for collapsibility and fluid absorbent pads integrated into the blanket to minimize evaporative cooling effects, featuring a top and bottom layer joined at sections with fluid absorbent means on the underside to absorb fluids without interfering with air circulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the blanket uses point joined locations for drainage, then fluids can be drained from the blanket, but the blanket requires careful placement and additional preparation before use

Engineering Contradiction:
Improveease of useVSAvoidpreparation requirements
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The blanket is pre-assembled with fluid absorbent pads attached to the bottom layer at the joined sections during manufacturing. This preliminary preparation eliminates the need for users to separately position fluid collection trays or prepare the blanket for fluid drainage, allowing the blanket to be used directly upon placement on the bed or table.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If the input port is configured to prevent impeding air flow, then air circulation is maintained, but the blanket cannot be folded flat for storage and shipping

Engineering Contradiction:
Improveair circulationVSAvoidstorage space
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The retainer mechanism at the input port is designed to be collapsible, allowing it to transition between an extended position during use (which maintains air circulation when open) and a collapsed position during storage (which allows the blanket to be folded flat). This dynamic design resolves the contradiction between maintaining air flow during operation and achieving compact storage.

Inventive Principle:
Principle #15Dynamics

3Object-affected harmful factors

If fluid absorbent pads are placed on the top surface, then fluids are absorbed, but the pads interfere with air circulation and patient contact

Engineering Contradiction:
Improveevaporative coolingVSAvoidair circulation
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

Instead of placing fluid absorbent pads on the top surface of the blanket where they would interfere with air circulation and patient contact, the pads are attached to the bottom layer (underside) of the blanket. This inverted placement allows fluids to drain onto the pads from above while maintaining unobstructed air circulation through the top layer and comfortable patient contact with the blanket surface.

Inventive Principle:
Principle #13The other way round (Inversion)

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

Enables the thermal blanket to be used directly without preparation, reduces storage and shipping space, and maintains patient temperature by minimizing evaporative cooling effects through efficient fluid absorption.

Implementation Method 1

a fluid absorbent pad may be secured to it for absorbing fluids that flow into that section

Methodology Applied
Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

the area through which fluids may pass into, and be absorbed by, the pad is increased

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Implementation Method 3

Due to the forming of multiple channels by the corrugated lower surface of such pad, the area through which fluids may pass into, and be absorbed by, the pad is increased

Methodology Applied
Scientific EffectCapillary flow: Capillary Action

Implementation Method 4

the top layer of the pad may be made of a hydrophobic material while the bottom surface of the pad... may be made of a hydrophillic material

Methodology Applied
Scientific EffectHydrophobicity: Hydrophobe

Implementation Method 5

the bottom surface of the pad... may be made of a hydrophillic material, so that the upper surface of the pad will remain dry

Methodology Applied
Scientific EffectHydrophilicity: Hydrophile

Implementation Method 6

the inventive blanket is designed to minimize the evaporative and cooling effects that occur when fluids are collected onto the blanket

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 7

An inflatable thermal blanket that is used to support a patient

Methodology Applied
Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS7666214B2Underbody thermal blanket
Publication Date: 2010.02.23 SMITHS MEDICAL ASD INC
  • US7666214B2 patent drawing
  • US7666214B2 patent drawing
  • US7666214B2 patent drawing

AI summary

An inflatable convective thermal blanket is designed to have at least one section on its top surface that has securely mounted thereon at least one fluid absorbent mechanism for absorbing fluids from a subject that is placed onto the blanket, or from fluids fallen onto the blanket from other sources. The one section is configured onto the blanket in such a way that it forms a well for collecting the fluids. The fluid absorbent mechanism, which may be in the form of a pad, would absorb the collected fluid to thereby minimize evaporative and cooling effects on the subject. Instead of mounting it on top of the blanket, the fluid absorbent pad may be mounted to the underside of the blanket, with appropriate holes and/or openings provided at the fluid collecting section, so that the collected fluids are drained onto the fluid absorbent pad. To enhance the input flow of air to the blanket, as well as to enable the blanket to be flatly folded for storage or shipping, a collapsible retainer mechanism is provided at the input port(s) of the blanket. The retainer mechanism opens up to a shape that facilitates the mating of an air hose to the input port. When folded to its collapsed position, the retainer mechanism, and the input port, would lie substantially coplanarly with the blanket. When configured to the position for accepting the air hose, the retainer mechanism is positioned substantially orthogonal to the blanket.