Ventilator mouthpiece valve

thingiverse

This is a mouthpiece valve designed for use with an emergency COVID-19 ventilator developed by http://ventilatorcrowd.org . It is necessary to have this valve if a Bag-Valve-Mask style ventilator is to be remotely mounted from the patient's face through a pipe. It is intended to be attached to the mouth tube. The purpose of this valve is to act as a non-return valve, allowing air from the bag to enter the lungs while directing exhaled air to the side port - it should likely have a filter on it. A thin silicone rubber diaphragm is used in this design, held by the ring, which uses pressure from the bag to keep the exhaust valve shut. This then opens when the pressure from the bag is released. A small disc valve prevents back-flow into the bag. Please take this design and adapt it to fit your needs. This is an initial prototype, untested and not approved. If you use it, you are responsible for verifying that it works properly and does not cause any issues. (The photos show an earlier version) I have yet to explore what materials will meet approval requirements and which adhesives should be used to join the parts together. This design is intended to be printed without support - there are a couple of overhangs, but with the right settings they should still print correctly. It was created using the academic version of Autocad Inventor - I have included the model files, note that they will have an academic watermark if used commercially.