B - Operations – Transporting – 81 – B
Patent
B - Operations, Transporting
81
B
B81B 3/00 (2006.01) A61M 1/00 (2006.01) A61M 5/142 (2006.01) A61M 5/145 (2006.01) A61M 5/168 (2006.01) G01N 1/14 (2006.01)
Patent
CA 2418642
A multiple piston magnetostrictive micropump (1) is disclosed for pumping fluid from multiple intake ports (2,8,14,20) to multiple delivery ports (7,13,19,25) at low volumes and controlled flow rates. The pumping action is achieved by the coordinated sequential strain of magnetostrictive actuators (3,4,5,6) into cavities (29,30,31,32). The coordinated sequential strain of the magnetostrictive actuators (3,4,5,6) creates unidirectional flow of the fluid from one cavity to the next cavity until the fluid is delivered at delivery ports (7,13,19,25). The magnetostrictive actuators (3,4,5,6) preferably are of the FeDyTb elements composition type known as Terfenol-D magnetostrictive materials providing greater magnetostriction and are isolated from the cavities (29,30,31,32) by thin seal layer (33). It is a further intent of this invention to provide accurate fluid volume mixtures at controlled flow rates by means of micromachined passage ways (27) embedded into micropump header (26).
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