Patent ID: 7311503
Filing Date: 2007-12-25
Classification: A61M,F04B

Abstract:
1. A micropump comprising: a Silicon On Insulator stack covered in a closure wafer, said stack comprising: said support wafer comprising at least a first duct passing right through it and situated in register with said cavity; said layer of insulating material having at least one first zone that is entirely free of material placed at least in line with said first duct so as to co-operate with said cavity to define a first moving member in said silicon layer, the first moving member being suitable, due to its elasticity and under pressure of liquid in said pump chamber, for moving reversibly towards said support wafer, said first moving member forming part of the flap of a liquid inlet control member; and said micropump further comprising a pumping portion comprising control means fitted with a pump diaphragm to cause the volume of the pump chamber to vary periodically, and liquid outlet control means.