Patent ID: 7204269

Claim:
A mobile concrete pump comprising a mast block rotatable about a vertical axis ( 20 ), at least five mast arms ( 1 to 7 ) which are pivotable relative to each other about horizontal pivot axes (B to G), and including a first mast arm and a last mast arm, wherein the first mast arm ( 1 ) is hinged to the mast block ( 22 ) so as to be pivotable about a horizontal pivot axis (A), while the end of the last mast arm has no articulated joint, and wherein the mast arms can be folded in groups relative to each other in the manner of a Z-fold or a coil-type fold for transport purposes, including a first Z-type folding group comprising the last three mast arms, a first coil-type folding group comprising the penultimate, third to last and fourth to last mast arms, and a second Z-type folding group comprising the third to last, fourth to last, and fifth to last mast arms.