Patent ID: 6213735
Filing Date: 2001-04-10
Classification: B01L,G01N

Abstract:
A micromechanical ejection pump for separation of small fluid volumes from a flowing sample fluid, the pump comprising:a substrate;a sample fluid duct for a sample fluid formed in the substrate;a working fluid duct for pressurizable working fluid formed in the substrate; anda supply duct via which working fluid can be supplied to the working fluid duct and an ejection duct to eject a fluid volume from the sample fluid, wherein:the working fluid duct extends transversely to the sample fluid duct and joins the sample fluid duct,the ejection duct is connected with the sample fluid duct and branches off the sample fluid duct opposite the working fluid duct,the sample fluid duct, the working fluid duct and the ejection duct are in fluid connection with each other, andthe working fluid duct, the ejection duct and the sample fluid duct have, at least in the area of the fluid connection, dimensions determining their respective cross-sections which are less than or equal to approximately one millimeter.