Patent ID: 7556480

Claim:
A fluid pump comprising a plurality of piston cylinders, wherein each individual cylinder has a piston rod with a piston arranged in the cylinder and a valve housing mounted at the end of the cylinder opposite the piston rod, and a drive arrangement for the piston rods, said drive arrangement comprising two main gearwheels which mesh and rotate in opposite directions, wherein the reciprocating motion of the piston rods, which extend in pairs in opposite directions, is effected with the aid of two beams that are fixed to the end of the respective pair of piston rods opposite the pistons and which extend at right angles relative to the piston rods, and that the beams are connected to the main gearwheels by shaft pins which move in pairs in a pin guide provided in the longitudinal direction of the respective beam and extending in the form of a sine curve to move the pistons at a constant speed to provide constant flow from the fluid pump.