Respirator COVID19 Concept R2

thingiverse

Open source design concept for low-cost mechanical respirator based on manual resuscitator or self-inflating bag, which is a handheld device (130 mm diameter) commonly used to provide positive pressure ventilation to patients who are not breathing adequately, as defined by Wikipedia. Three 608 bearings are required. It relies on the use of a simple "car window" motor coupled in the eccentric gear. Alternative shapes and eccentricity of the disc can result in different air pressure and release rates. Design available at https://www.tinkercad.com/things/d3R13CpPf5m, along with three separate printable parts (base, arm, and gear). A copy of the gear with additional holes to adjust excursion has been added (March 28th, 2020). While the simple gear has a 50mm excursion, the adjustable one can be set for 30, 40, or 50mm excursion. It is a concept intended to stimulate further development. It may require further mechanical development and testing to work properly. ADDITIONS: Adjustable Gear_R2_Respirator_COVID19_Concept.stl added: Added three sets of holes to adjust the excursion of the eccentric disc (original 50mm, 40, and 30mm). Alternative Gear_R3_Respirator_COVID19_Concept.stl added: Alternative shape adapted from the OxyGEN project https://github.com/ProtofyTeam/OxyGEN to replace the eccentric disc. Gear_R3_Respirator_COVID19_Concept.stl added: Print all gear pieces and the "disc" with alternative shape.