Nikola Tesla invention from 100 years ago suddenly makes more sense today – CNET
Tesla’s macrofluidic valve — often just called the Tesla valve — is a sort of odd-shaped conduit for fluids in which a main channel is interspersed with a series of diverting teardrop-shaped loops. The loops are oriented in such a way that fluids easily flow through in one direction, but when reversed, the flow is almost totally blocked. In other words, it can be thought of as a sort of one-way or check valve, which anyone who has done a fair amount of plumbing or work with pumps will be familiar with. The advantage of Tesla’s design is it has no moving parts that can wear out like the springs and other mechanisms on conventional check valves.