"Portable and mobile construction crane under load" Portable and mobile construction crane under load (1), referred to as crane (1), comprising a
chassis (2, 3) on which are mounted four wheels (230, 240, 330, 340), of which at least two are swiveling, a mast (4) the base of which is mounted swiveling on said
chassis, said mast being swiveling, in a median
longitudinal plane of the crane, around a
transverse axis, a jib (6) fixed on the head of said mast, said jib being swiveling, relative to said head of said mast, around a
transverse axis, and sliding, on the head of said mast, along a sliding axis, included in the median
longitudinal plane of the crane, adjustable by swiveling said jib. The boom is suitable for receiving a gripping means (7) for a load to be moved (16), or one or more force transmission means (8) intended to support, at least in part, a load to be moved and / or a lifting means (9) for said load to be moved.The crane includes a jack (10), arranged to pivot said mast so as to carry a distal end of said boom cantilevered from said
chassis, the base of which is mounted pivotally about a
transverse axis distinct from the transverse axis about which the mast pivots, on the chassis; a head is mounted pivotally about a transverse axis on an upper quarter of the mast located on the side of said head of said mast, said jack being pivotable, relative to the mast and the chassis, in the median
longitudinal plane of the crane. Figure for the abbreviation: Figure 1.