FIELD: mining industry.
SUBSTANCE: device has hollow body, striker for controlling exhaust, chambers of straight and reciprocal drive. At least one of these chambers is provided with means of dosed transferring of compressed air into it, exhaust channel and outlet valve, providing for free displacement of air from this chamber by moving striker. Outlet valve is made in form of resilient compacting ring placed on striker with capability for interaction with portion of inner surface of body limiting this chamber. Portion is made in form of stepped cylinder with smooth connection of steps. Diameter of lesser step matches outer diameter of outlet valve on striker. Before changing direction of movement striker displaces valve into lesser step of cylinder, providing for preliminary sealing of chamber and precise closing of outlet valve.
EFFECT: better launch and higher specific energetic indexes of pneumatic striking machines.
4 cl, 4 dwg
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