PAPR adapter: hose to 40mm threaded insert for mask filter

thingiverse

Human: Full Fusion 360 design can be found here: https://a360.co/2QHDYmR This adapter makes it possible for 3M PAPR hoses to connect directly to full face respirators that accept 40mm threaded cartridges, including AVON and Scott masks. To ensure proper airflow, the second cartridge hole of the respirator should be sealed off to prevent air from flowing in the opposite direction through a filter. This adapter was designed using the 3M Adflo Powered Air Purifying Respirator (PAPR) System into the filter connection of the Scott Safety ProMask 25 Full Facepiece General Use Respirator. The goal behind this adapter is to provide a steady supply of purified air into full face respirators that can be sanitized. This could significantly help first responders and medical staff breathe easily while seeing patients, particularly during COVID-19 situations. However, this adapter was not designed as a ventilator for patients; its purpose is to support hospital staff in their working conditions. The adapter will screw directly into the 40mm threading that fits any 742 Twin Cartridges, NIOSH 42 CFR Part 84 approved filters (AVON and SCOTT masks). This design prints well without supports. I used a 0.2mm layer height PLA when printing with good results on an Ender 3. https://www.3m.com/3M/en_US/speedglas-welding-helmets-us/adflo/ https://www.fishersci.com/shop/products/scott-safety-promask-25-full-facepiece-general-use-respirator-3/p-3163726 The PAPR system providing the air is designed to help keep welders fresh, cleaner and more comfortable by delivering filtered air around the face and head. DISCLAIMER: This adapter has not been approved as a medical device and requires further testing. Use this at your own risk and discretion in accordance with FDA policy. See this document for COVID-19 guidance: "Enforcement Policy for Face Masks and Respirators During the Coronavirus Disease (COVID-19) Public Health Emergency Guidance for Industry and Food and Drug Administration Staff": https://www.fda.gov/media/136449/download