Patent ID: 7753238

Claim:
Volume measurement and/or metering device with a cylinder/piston and cock system for sucking in and/or discharging liquids in a defined way, a piston being movable in relation to a cylinder for sucking in or discharging liquid, the cylinder being mounted, together with a cylinder bottom, rotatably with respect to the cock system about an axis of rotation parallel to a cylinder longitudinal axis, the cylinder bottom bearing with a sealing seat against a cock element of the cock system having at least one duct orifice, and these orifices being arranged in such a way that the at least one orifice in the cylinder bottom can be brought into congruence alternately with the orifice or orifices of the cock element when the cylinder and cylinder bottom are rotated, wherein means for the simultaneous closing of all the orifices of the cylinder bottom are provided, and whereby all the orifices of the cylinder bottom are closed by the cock element.