Patent ID: 6866484

Claim:
A multi-cylinder high-pressure plunger pump comprising: a plurality of plungers arranged equidistantly on a circle; a drive unit for said plungers, the drive unit being arranged in a housing and comprising a drive part which is rotatably mounted about an axis of rotation in the housing and carries along a wobble plate with wobbling action about the axis of rotation of the drive part, the wobble plate being tiltable via a joint arranged in the housing; and axially moveable plunger actuators each coupled to a plunger, the plunger actuators being pressed against the wobble plate; wherein the drive part is a roller being provided with a first opening extending in a direction perpendicular to the axis of rotation, the first opening taking up a piston such that it is displaceable perpendicularly to the axis of rotation, the piston being displaceable by a hydraulic load, the piston being provided with a cut-out extending in the direction of the axis of rotation accommodating a mount in the form of a ball-and-socket joint connected with the wobble plate through a second opening in the roller and rotating together with the roller, the ball portion of the mount being axially displaceable within the cut-out as the piston is displaced during operation of the pump.