Patent ID: 6455006
Filing Date: 2002-09-24
Classification: B01L,G01N,Y10T

Abstract:
A sample sucking-discharging device comprising an injector provided with a cylinder and a piston installed in the cylinder so as to move up and down; a main body for holding the cylinder of the injector; a gear or a pair of gears held in the main body, wherein each gear comprises a hub, so as to rotate on an axis right-angled to the moving direction of the piston; a first rack, of which one end is connected with the piston, for meshing with the gear or the pair of gears; and a second rack held in the main body so as to move in the direction opposite to or crossing with the moving direction of the first rack wherein the one gear is composed of a dual gear provided with plural teeth formed into two lines on the surrounding of the hub, and the first and the second racks mesh respectively with the lined teeth different from the other.