FIELD: percussion action building and mining machines, possibly development of manual pneumatic hammers in machine engineering, heady-duty pneumatic percussion action machines for breaking rocks and frozen grounds.
SUBSTANCE: in pneumatic hammer with throttle type air distribution surfaces engaging one to other are provided with annular turnings. The last are arranged in portions of mounting surfaces of striker and tube in such a way that length values of turning portions along generatrix are less than length values of generatrix portions of mounting surfaces of striker at side of cylinder and at side of tube.
EFFECT: increased percussion power of hammer, increased energy of single shock.
9 cl, 16 dwg
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