Patent ID: 8570029

Claim:
A metering apparatus for liquids, with a base body ( 2 ), a pipette holder disposed on the base body ( 2 ) for holding at least one pipette point ( 6 ) in sealing connection with its upper opening to a passage opening ( 15 ) on the base body ( 2 ), and a displacement device ( 12 ) disposed in the base body ( 2 ) having a displacement chamber ( 13 ), a displacement member ( 14 ) movably disposed therein, and a communicating connection to the passage opening ( 15 ), or syringe holder disposed on the base body ( 2 ) for holding at least one syringe with a syringe cylinder in stationary relation to the base body, and with a syringe piston shiftable in the syringe cylinder and a coupler configured to be mechanically coupled to the syringe piston in the base body, a detachment device disposed on the base body ( 2 ) for detaching the pipette point ( 6 ) or syringe from the pipette holder, with a manually actuable actuation member ( 7 . 4 ) for actuating the detaching device without that the displacement member ( 14 ) or the coupler are moved, a sensor ( 16 ) disposed on the base body ( 2 ) for detecting an actuation of the detaching device or an occurred detachment of the pipette point or syringe, a controllable drive ( 20 ), which is operably connected to the displacement member ( 14 ) or the coupler, an input device for controlling the controllable drive ( 20 ), an electric control device, electrically connected to the controllable drive ( 20 ), the input device and the sensor ( 16 ) and the electric control means automatically configure the controllable drive ( 20 ) to dislocate the displacement member ( 14 ) or the coupler into a base position when the sensor ( 16 ) detects an actuation of the detachment device or the occurred detachment of the pipette point ( 16 ) or syringe.