Silvana Decathlon face mask adapter variants (leak free / feeding)

Hello

Thanks a lot for the work provided by Vincent Groenhuis and his team for the awesome Silvana face mask adapter (https://www.prusaprinters.org/prints/27214-decathlon-face-mask-adapters)

Here are some improvements/variants of the original design to fulfill Arras (France) IHU needs.

1. A "leak free" variant (small-d_v087_leak_free_22int) that can welcome a silicone seal on the middle air input so that it can be completely separated from the air output. The join can be printed with flexible filament (or manually crafted from a silicon sheet). I tested this idea and I obtained a 100% leak free adapter. This design was tested in Arras IHU.

2. A "feeding" variant (Silvana_D_v1.2_Food_22ext): the central hose is repurposed to welcome a food canal. The diameter is 5mm. The side hose is still reserved for the ventilation (the air input and output uses the same hose). This air canal has an internal diameter of 22mm (conical for a better insertion). This model is based on the silvana v1.2 so a seal can be added to avoid any air leakage. But it is not necessary as feeding hoses generally comes with a silicone cap that provides sealing with the exterior. This design is used in Arras IHU since 09/04/20

3. A feeding "reversed" variant (Silvana_D_v1.2_Reversed_Food_22ext) : the adapter is installed the other way. The system "mask + pipes" is better balanced. It is more confortable and the etancheity is improved. This design is tested in Arras IHU since 11/04/20

I will provide various files with several diameters (19,4mm, 22mm external, 22mm internal) ASAP

Have a nice day, and keep safe !

Print instructions

The instructions are the same as the original model (https://www.prusaprinters.org/prints/27214-decathlon-face-mask-adapters)

The models does not need any support :)