Tesla one-way valve
grabcad
It was invented in 1916. (U.S. patent 1,329,559; patented 1920. by Nikola Tesla) Tesla valve offers resistance 10-200 times greater in one direction compared to the another, in which the flow is turbulent. (wiki) Model created in PartSolutions v9 https://b2b.partcommunity.com/community/partcloud/#!part?name=Tesla+one-way+valve&model_id=13291
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