Patent ID: 7452508
Filing Date: 2008-11-18
Classification: B01F,B01L,G01N,H05K,Y10T

Abstract:
1. A combination aspirating probe, probe tip, and pump, comprising: a probe tip for mixing liquids within the tip after aspiration of the liquids therein, said tip comprising: an end portion adapted to engage an aspirating probe, a wall defining three connected cavities of unequal inside diameters, a compartment being formed by a middlemost cavity sandwiched as a middle compartment between the other two cavities which form end compartments, each two adjacent cavities being connected by a relatively sharp transition zone wall having a radius of curvature of less than 25 microns and said inside diameters being sufficiently unequal in said adjacent two cavities as to cause rotational mixing of liquids as they move past said transition zone wall, wherein said transition zones of the middlemost cavity is formed by a variance of said inside diameter that increases in value as the middlemost cavity is transited outward into said other two end cavities; an aspirating probe, wherein the probe tip is adapted to fit onto the end of the aspirating probe; and a pump for creating a partial pressure or vacuum.