B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
Grue mobile equipee de supports deployables telescopiques et mecanisme commande a organes filetes assurant le deploiement telescopique desdits supports
Grue autotractee equipee de supports deployables de stabilisation et de jambes de force mobiles verticalement associees a ces derniers, et support deployable ainsi realise