PERCUSSIVE DEVICE Russian patent published in 1997 - IPC

FIELD: mining and construction equipment. SUBSTANCE: percussive device has body with inlet and outlet openings, striker positioned within body for axial displacement and dividing body cavity into forward and return stroke chambers, flexible member positioned in return stroke chamber in axial alignment with outlet opening and locking valve positioned in outlet opening. Flexible member is fixed with its one end to locking valve and with its other end to striker. Device may be provided with guiding stem positioned within flexible member and attached to locking valve and locking valve stroke limiter fixed on end of guiding stem. EFFECT: increased efficiency, wider operational capabilities and enhanced reliability in operation. 2 cl, 6 dwg