Apparatus for excavating soil and the like using supersonic jets

摘要: A "soft excavator" utilizes supersonic jets of air to loosen and remove soil the like without damage utility lines other "hard" buried objects. pair digger nozzles, each mounted at an angle axis tubular support shaft which in turn is for planetary motion on a drivehead rotating about member, trace epitrochoidal path around inlet member advances with rotation uniformly across cutting face gather lossened toward member. Injector nozzles direct into direction discharge end generate secondary flow sucks aerated by The entrained decelerated diffuser flexible bag deposited pile. Compressed delivered through annular passage stationary chamber formed passes radial passageways upper ends nozzle shafts. can be driven motors are supplied compressed from feeding nozzles. These engage idler gears common sun gear fixed also engaged planet Alternatively, air, hydraulic or electric motor driving separate drivehead.