PRESSURIZED FLUID DRIVEN TOOL Russian patent published in 2001 - IPC

FIELD: hydraulic tool for unclamping constructions and expanding joints between construction members. SUBSTANCE: pressurized fluid driven tool is made of box- like housing provided with connecting head and slider mounted inside the housing for forward motion and connected to the piston sliding inside the cylindrical housing. The slider is made of a wedge with the rectangular base. The box-like housing contains two pairs of stopper plates of various length. One pair is bearing rigid stopper plates. The second is thrust flexible spring-loaded detachable stopper plates. The bearing stopper plates are shorter than thrust plates and their one ends are rigidly fixed with the connecting head by bolted connections. The thrust stopper plates are connected to cross-shaped bolt heads with bearing straps and bolted connections for screwing and unscrewing connections without manual tool. The second ends of the bearing stopper-plates are free and that of the thrust stopper-plates are pressed to each other forming a wedge. EFFECT: improved design. 7 cl, 8 dwg