| 摘要 |
FIELD: earth-moving machinery; ripping of hard and frozen grounds. ^ SUBSTANCE: two-radial step holes are made in housing of screw head coaxially, axis of holes is located at a distance from lower end face of screw head housing equal to travel of piston with striker in space of screw head housing plus smaller diameter o plunger installed and loaded by spring relative to lockring in radial step hole. Ring groove is made on striker at a distance from its sharp conical part equal to travel of piston with striker in space of housing of screw head. Bypass flange is installed in under piston space and is provided with central hole for mounting striker for limited axial displacement and with concentrical step holes into larger diameters of which normally closed needle valves are installed and springs are provided for pressing normally closed needle valves to concentric calibrated throttling holes made in housing of screw head from side of piston space for communicating with radial step holes which communicate also with smaller diameters of concentric step holes made from side of lower end face of step bore in upper part of inner space in screw has housing. ^ EFFECT: increased capacity of gas dynamic ripper. ^ 4 cl, 5 dwg
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