Patent ID: 7552828

Claim:
A support construction for mobile concrete pumps, comprising at least two support booms, each support boom having a chassis, a push-out box disposed on the chassis, said push-out box having a telescopic part engaging into the push-out box, said telescopic part comprising at least first and second telescopic segments movable in relation to the chassis, one of said at least first and second telescopic segments being guided inside another of said first and second telescopic segments, a foot part disposed on a front end of the first telescopic segment, a plurality of coupling pins, and a coupling member, wherein the push-out box and at least part of the telescopic segments have coupling points on which the first telescopic segment can be coupled with the second telescopic segment so as to produce a fixed connection when the segments are retracted in relation to each other, wherein the coupling pins are disposed at the coupling points, the coupling points having a defined distance from each other in a retracted state of the telescopic segments, and wherein the coupling member has first and second recesses disposed at a distance from each other corresponding to the distance of the coupling pins from each other to permit the coupling member to be set onto selected coupling pins.