3M mask - ventilator filter connector (incl. endcap)

thingiverse

[update] The project has been modified to insert the connector into the filter from the side without a leer-lock, which might easily get loose. ------ This is a connector for a 3M multi-use mask (non medical by standard) to a standard inlet of a filter of a breathing ventilator. As far as I know, all 3M masks have the same type of plug, so this connector should fit to various types of masks by 3M company. If a paramedic works in the field, they need 2x filters. However, for static work inside a hospital, only 1 filter is needed. Therefore, I include an endcap to close the other outlet of the 3M mask If you don't have the 3M mask, here is a project to print the mask yourself: https://www.thingiverse.com/thing:4241187 The size is quite thick to ensure the rigidity and to be sure that the sealing works well. The tollerances are high narrow to make sure that the tube gets tightly into a filter. If it's too tight or too loose, play with the settings HORIZONTAL X/Y COMPENSATION (Slic3r, Simplify3D) or HORIZONTAL EXPANSION (Cura) to adjust the exact thickness of the tube. ***IMPORTANT*** This connector is only an alternative to the original and certified elements. The seal has not been clinically tested. It has only been accepted by some individual doctors, based on their own assessment. Nevertheless, from the logical point of view, it should be fully sealed, due to tight fit.