Patent ID: 8685342
Filing Date: 2014-04-01
Classification: B01L,B67D,G01N

Abstract:
1. A device for receiving and dispensing liquids to and from liquid receptacles or pipette tips, the device comprising: a piston plate having a plurality of pistons; a cylinder plate defining a plurality of cylinders, wherein each piston engages one cylinder; a drive mechanism connected to at least one of said piston plate and said cylinder plate, said drive mechanism disposed, structured and dimensioned to change a separation between said piston plate and said cylinder plate, thereby displacing said pistons in said cylinders to receive and dispense the liquids; a plate guidance to direct relative motion between said piston plate and said cylinder plate; at least three upper stops, said upper stops disposed in and defining an upper stop plane; and at least three lower stops, said lower stops disposed in and defining a lower stop plane, said lower stop plane being parallel to said upper stop plane, with equal dosed liquid volumes for all pistons and cylinders being defined by displacement of said piston plate relative to said cylinder plate from said upper stop plane to said lower stop plane, wherein said plate guidance directs said relative motion between said piston plate and said cylinder plate in a direction substantially perpendicular to said upper and said lower stop planes.