IMPROVEMENT FOR A HOISTING BOOM ASSEMBLY

专利名称：IMPROVEMENT FOR A HOISTING BOOM

ASSEMBLY

发明人：SAKARI PINOMAKI申请号：AU1892492申请日：19920622公开号：AU1892492A公开日：19930125

摘要：PCT No. PCT/FI92/00194 Sec. 371 Date Dec. 23, 1993 Sec. 102(e) Date Dec. 23,1993 PCT Filed Jun. 22, 1992 PCT Pub. No. WO93/00286 PCT Pub. Date Jan. 7, 1993.Ahoisting boom assembly comprises an upright column being piviotable by a rotaryactuator and a first and second boom, the first boom pivotally mounted by its first endon upright column and by its second end on second boom; the second boom having itsfirst section and its second section journalled to be pivotable in a vertical plane; ahorizontal shift mechanism as well as a horizontal shift actuator for carrying the free endof the second boom in a horizontal direction; and an actuator fitted between uprightcolumn and the first boom for pivoting the first boom. In order to improve itsperformance, the hoisting boom assembly further includes compensating means forequalizing the forces caused by the operation of a hoisting boom assembly, particularlyin situations following and preceding a first and/or a second extreme position assumedby a second boom.

申请人：SAKARI PINOMAKI

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