Alfmeler Prazision Ag Baugruppen Und Systemlosungen

Alfmeier PrÄzision Se

Alfmeier Prazision Ag Baugruppen Und Systemlosungen

Sandheep K Surendran

Peter Emery Von Behrens

Andrei Szilagyi

Jean-Pierre Maeder

Ali Ghorbal

A valve system including a number of shape memory alloy ('SMA')-actuated valves for controlling the flow of fluids is disclosed as is a variety of types of SMA-actuated valves and methods of operation. In one embodiment, a valve system includes a housing having a substantially closed cavity as well as a second port for communicating a fluid. Further, the valve system includes a first SMA actuator configured to control the position of the first seal to vary fluid flow through the firs port, and a first temperature compensator for adjusting the position of the seal by an amount proportional to temperature. A second SMA-actuated valve, driven by either a unidirectional or a bidirectional SMA actuator, controls the position of the second seal to vary fluid flow through the second port, and a second temperature compensator for adjusting the position of the second seal by another amount proportional to temperature.

System, method and apparatus for reducing frictional forces and for compensating shape memory alloy-actuated valves and valve systems at high temperatures

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San Francisco, CA, United States of America

Sandheep K Surendran