HYDRAULIC HAMMER Russian patent published in 2004 - IPC

FIELD: machine engineering, namely manual powdered percussion-action tools that may be used in mining, building and other industry branches.

SUBSTANCE: hammer includes housing in which piston-striker, stepped plunger, stepped spool having outer annular turning are mounted along the same axis; forward-stroke sleeve arranged concentrically, axial and radial ducts, forward stroke chamber and reverse-stroke chamber. Hydraulic hammer also has sleeve for controlling stepped spool, spacer with collar and reverse stroke sleeve. Forward-stroke chamber is restricted with stepped plunger, forward-stroke sleeve and piston of accumulator mounted in end portion of housing. Additional chamber is restricted with piston-striker end, stepped plunger and inner surface of spacer. Housing includes stem-tool portion with spring-loaded inlet, dynamic and control portions that are kinematically joined one with another. Hammer is also provided with spring-loaded handle secured to housing with possibility of axial motion and trigger mechanism.

EFFECT: enhanced technological effectiveness design.

3 cl, 5 dwg