DEVICE FOR MAKING HOLES IN GROUND Russian patent published in 1994 - IPC

FIELD: hole making in ground. SUBSTANCE: device has hollow body, source for supply of working agent, hose, hollow working member, explosive charge igniter and appliance for supply of explosive. Hose is located in inner hollow of body. Working member has combustion chamber nozzles for escape of combustion products and piston with hollow rod. Explosive supplying appliance is made in form of hose for supply of fuel gas mixture and hollow to receive hose. Igniter is made in form of electrode. One end of rod is rigidly connected with piston. Free end of rod is pointed and has channels for discharge of combustion products. Inner space of combustion chamber is communicated through rod inner hollow with channels for discharge of combustion products. EFFECT: higher efficiency. 1 dwg