Patent ID: 7909059

Claim:
Mobile concrete pump having a chassis, an articulated mast disposed on a substructure affixed to the chassis, serving as the carrier for a feed line, and having at least four mast arms comprising first, second, third, and fourth mast arms, the first mast arm being articulated onto a rotating head that can be rotated about a vertical axis of the chassis, with its one end, by controlling a rotary drive, whereby the mast arms can be pivoted relative to the rotating head and relative to an adjacent mast arm, in each instance, about horizontal articulation axes, by controlling related articulation drives, having two front and two rear support booms, disposed on the substructure affixed to the chassis, which booms can be moved from a travel position into a support position, if necessary partially, each have a telescoping support leg, and can be supported on a substratum, raising the chassis, whereby each support boom has a support position close to the chassis and at least one support position away from the chassis, which positions can be freely selected for the four support booms, forming defined support configurations, and having a control device for the mast arm movement that has a software routine or restriction circuit that responds to the support configuration selected, wherein a selection switch having multiple switching positions corresponding to different support configurations is provided, wherein the control device for the mast arm movement responds to the switching position of the selection switch and restricts the pivot angle range of the first mast arm about its articulation axis, and restricts a related rotation angle range of the rotating head about its vertical axis, in accordance with the selected support configuration.