Patent ID: 8684232

Claim:
Colorant fluid dispensing device for dispensing multiple colorant fluids, said colorant fluid dispensing device comprising more than one fluid container for containing a colorant fluid, at least one dispenser outlet for dispensing the colorant fluids of the fluid containers, wherein the fluid containers are in fluid connection with the at least one dispenser outlet via pumping means for pumping said colorant fluids of the fluid containers out of the at least one dispenser outlet, the pumping means comprises more than one piston pump, each piston pump comprises a central pump tube in which a piston is provided, the piston being connected to a piston rod for moving the piston inside the central pump tube, the colorant fluid dispensing device further comprises driving means for moving the piston rods of said piston pumps, control means for controlling the driving means, and input means for providing a first input to the control means, which first input indicates a selection of multiple piston rods, the driving means comprises a movable selector configured to engage the piston rods of the selection such that the piston rods of the selection are simultaneously movable along with the selector without moving the piston rods not part of the selection, the selector comprises engage means configured to engage or disengage at least one of the piston rods such that engaged piston rods are simultaneously movable by the selector without moving disengaged piston rods, and the control means is configured to control the engage means such that the engage means engage the piston rods of the selection and disengage the piston rods not part of the selection.