Patent ID: 6627160
Filing Date: 2003-09-30
Classification: B01L,G01N

Abstract:
Multiple channel pipetting device, comprising:a housing with a transversely arranged shaft carrier and a moveable plunger carrier arranged transversely above the shaft carrier; a number of plunger receptacles in the shaft carrier and a corresponding number of pipette plungers positioned on the plunger carrier and inserted in the plunger receptacles; a number of shaft receptacles corresponding to the number of plunger receptacles, said shaft receptacles being inserted in the shaft carrier on an opposite side from the plunger carrier and extending from the plunger receptacles; and a number of pipette shafts corresponding to the number of shaft receptacles and removably inserted in the shaft receptacles; wherein each pipette shaft has a cylinder adapted for the pipette plunger and a tip holder on a lower end with an ejection channel arranged therein; wherein an outer side of an upper end of each cylinder is adapted for attachment in a respective shaft receptacle; wherein a pipette tip is received on each tip holder; and wherein each pipette plunger has a circumferential plunger seal which is positioned in a respective circumferential seal receptacle of an inner upper end of each pipette shaft; and wherein the circumferential plunger seal is mounted so as to remain in the seal receptacle, at least in the case of a pulled back pipette plunger, when the pipette shaft is removed from the shaft carrier.