Patent ID: 6164145
Filing Date: 2000-12-26
Classification: G01N

Abstract:
A sampling apparatus, comprising:a liquid sampler operable to obtain discrete samples of liquid from a body of liquid, said liquid sampler including a sampler body having a bore with a forward opening;plunger means in said sampler body bore, said plunger means having a liquid sample receiving aperture therein, andmotor means for reciprocating said plunger means in said bore to each of a sample receiving position where said aperture is extended out of said forward bore opening, a sample delivering position where said aperture is retracted to a position within said bore for collecting the sample, and a parked position within said bore and intermediate said sample receiving and delivering positions, said motor means including first and second motor means and said second motor means comprising a piston in a cylinder and a piston rod having a rearward end attached to a forward end of said piston, said piston rod having a forward end that abuts and pushes said first motor means to move said first motor means in a direction to reciprocate said plunger means forward to said parked position.