IMPACT DEVICE Russian patent published in 2010 - IPC B25D9/04 

FIELD: construction.

SUBSTANCE: invention relates to mining and construction equipment - to pneumatic impact devices, is used to break rocks, to drive rod elements into soil, etc. Device comprises vessel with holes, striker with longitudinal channels, chambers of forward and backward motion, exhaust system, inertial valve installed with the possibility of axial motion in specified channel until ledge in it, seat of inertial valve arranged in this channel at the side of forward motion chamber, elastic bush installed in the same valve, and support bushing installed between inertial valve and elastic bush.

EFFECT: invention provides for increased reliability of operation due to limitation of elastic bush deformation.

11 cl, 9 dwg