Ventilator

thingiverse

**Disclaimer**: This machine is still a work in progress and should not be used as-is in an actual hospital setting. The design intent focuses on the mechanical aspects of the device and its 3D printed structure. This Ventilator is an experimental creation by Mitch Bahneman, a student at Chippewa Valley Technical College studying Mechanical Design. The goal is to develop a simple, mostly 3D printed machine that functions as an emergency bag-valve-mask (BVM) compression device. The design uses a standard adult-sized BVM, which are widely available and easily compresses the mask using human-like hand movements. Basic off-the-shelf electronics achieve this task, with parts readily obtainable for under $50. Future upgrades include integration of a microprocessor, flow-rate sensor, limit switch, and coding. **Electronics List:** As testing continues, this list will be updated to reflect necessary components: * Motor: 2002-2005 Volkswagen Jetta windshield wiper motor * 12-volt DC speed controller: rated for 6Amp * 6Amp Power Supply The Ventilator is printed in eight distinct parts and requires approximately 3-4 days to produce, using about 1.5KG of filament. PETG was chosen for its strength, but printing with PLA or ABS may also be possible. To ensure maximum structural integrity, printing is recommended with the following settings: * **Ventilator Base**: Layer height: .3mm, line count: 5 at top and bottom walls; cubic infill: 20-30% * **Arm Split1 and Arm Split2**: Layer height: .3mm, line count: 4 at top and bottom walls; cubic infill: 30-40% * **Pump Base and Bag End**: Less demanding requirements; layer height: .3mm, line count: 3; cubic infill: 20% * **Plunger**: Layer height: .3mm, line count: 4 at top and bottom walls; cubic infill: 30-40% * **Short Arm V2 and Lng Arm V2**: Require added strength; layer height: .3mm; 100% infill