Gesim Gesellschaft Fur Silizium-mikrosysteme Mbh

Evotec Biosystem Ag

Thomas Wegener

Steffen Howitz

Karsten Henco

Rolf Guenther

Mario Burger

Thomas Gehring

Daniel Seifert

Toni Bohatzsch

A micromechanical ejection pump for extracting small fluid volumes from a flowing sample fluid is provided with a substrate, and a canal for pressurized working fluid. The micromechanical ejection pump also has a canal for ejecting a fluid volume from the sample fluid. The working fluid canal runs into the extension of the sample fluid canal discharging crosswise thereto. The ejection canal connected to the sample fluid canal branches off from the working fluid canal opposite to the sample fluid canal. The working fluid canal and the ejection canal have in particular a substantially similar cross-section of 0.01-0.12 mm,, wherein the ratio of the cross-section of the sample fluid canal to the cross-section of the working fluid canal or the ejection canal is preferably between 0.2 and 0.5, more particularly between 0.3 and 0.4 and most preferably 0.35.

Micromechanical ejection pump for separating small fluid volumes from a flowing sample fluid

A microejector pump for generating microdrops includes at least one pump chamber configured in a silicon chip and a piezoelectrically actuable silicon membrane arranged over the pump chamber. The pump chamber is connected to at least one supply line as well as a discharge line provided with an ejection orifice. A glass chip closes off at least the pump chamber from the silicon membrane. The microejector pump can also include an integral heater and controller.

Microejector pump

Growing community of inventors

Neuruppin, Germany

Thomas Wegener