Gravity-Driven Ventilator Piston Mechanism

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Solution Overview

Problem

Conventional ventilators are complex, require significant technical expertise, and rely on electronic components, making them vulnerable to failure and difficult to produce quickly, especially in situations like pandemics or natural disasters where simple, durable, and easily manufacturable breathing assistance devices are needed.

Innovation Solution

A gravity-dependent ventilator design using a simple motor as the sole electrical component, with passive components and mechanisms that regulate air pressure and volume, preventing over-insufflation and allowing for rapid production with accessible materials and local labor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional ventilators use multiple electrical components and complex control systems, then ventilation precision and control capability are improved, but device complexity and vulnerability to failure increase

Engineering Contradiction:

Improveventilation control precisionVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent removes all electronic control components from the ventilator system, extracting the control function entirely from the electrical domain. The device uses purely mechanical means - a hand-cranked piston system - to deliver ventilation, eliminating circuits, sensors, and microprocessors while maintaining core ventilation functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the electrical control system with a mechanical system. Instead of using motors and electronic controllers to move the piston, the invention uses direct manual cranking by a healthcare provider, substituting electrical actuation with mechanical hand-cranking while preserving the ventilation delivery capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If conventional ventilators use electronic components for control, then ventilation regulation capability is improved, but ease of manufacture and rapid production are worsened

Engineering Contradiction:

Improveventilation regulation capabilityVSAvoidease of manufacture

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent employs a simple, easily manufacturable design that can be rapidly produced using basic machining and assembly techniques. The device uses common materials and straightforward construction methods, making it suitable for mass production in various settings without requiring specialized manufacturing capabilities or supply chains for electronic components.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The ventilator is designed as a segmented system with distinct functional components - a cylindrical chamber, piston, outlet tube, and hand-crank mechanism - that can be manufactured separately and assembled quickly. This modular approach allows for parallel production and simplifies the manufacturing process, enabling rapid deployment during emergencies.

Inventive Principle:

Principle #1Segmentation

3Reliability

If BVM ventilators are designed to be simple and durable, then ease of manufacture and robustness are improved, but lifespan and delivery precision are worsened

Engineering Contradiction:

Improverobustness and durabilityVSAvoidventilator lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The ventilator incorporates a one-way valve system that automatically prevents exhaled carbon dioxide from re-entering the patient during the compression phase. This self-regulating mechanism ensures proper ventilation function without requiring external control systems, maintaining reliability while extending usable lifespan through automatic protection against malfunction.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The device includes a one-way valve positioned to prevent contamination before it can affect the system. By placing the valve at the strategic location where exhaled air could re-enter, the design preemptively blocks the pathway for CO2 recirculation, preventing potential failure modes before they occur and extending the device's reliable operational life.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 ventilator is robust, durable, and fail-safe, delivering a repeatable volume of breathable air with adjustable pressure, suitable for rapid production and use in emergency situations without requiring extensive technical expertise.

Implementation Method 1

The piston has a mass that is large enough such that the piston, when not being moved upwards or inhibited from moving downwards by the driving element, overcomes friction with the sidewall of the chamber and pressure from the breathable air in the lower portion of the chamber to move downwards towards the bottom of the chamber due to gravity.

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentUS10926046B1Gravity dependent ventilator

Publication Date: 2021.02.23 FLORIDA INTERNATIONAL UNIVERSITY

AI summary

A ventilator that utilizes a cam lever to raise a piston within a cylinder is provided. The weight of the piston can push breathable air out of the cylinder to a patient. A motor assembly provides the only electronic component necessary to operate the ventilator. Adjustments to volume, speed, and pressure can be made by adjusting mechanical components of the ventilator.