An engineering team at Humphrey Products has engineered a one-piece pneumatic diaphragm valve for use in a medical anesthesia machine. The brass-body valve includes an integral pilot actuator and reportedly operates with zero leakage at 50 psig. Its design represents a departure from traditional anesthesia machine valves, which typically use a two-piece configuration that incorporates sliding seals. In contrast, Humphrey's valve employs a diaphragm that incorporates no sliding seals, and therefore can operate precisely for millions of cycles. For more information, visit http://rbi.ims.ca/4388-539.
Two different shape-shifting polymers have been announced from two different universities: Wyss Institute at Harvard University and Zhejiang University in eastern China. Both of them change their shapes when immersed in water, and the one from Wyss Institute was made with 3D-printing techniques.
When you think of the DARPA Robotics Challenge, you may imagine complex humanoid contraptions made of metal and wires that move like a Terminator Series T-90. But what actually happened at the much-vaunted event was something just a bit different.
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