PNEUMATIC IMPACT DEVICE FOR DRIVING ROD-LIKE MEMBERS, PARTICULARLY PIPES, INTO SOIL (VARIANTS) Russian patent published in 2004 - IPC

FIELD: mining, building and other industries, particularly pneumatic devices for rod-like members driving into soil. SUBSTANCE: device has impact weight, guiding means for impact weight movement including pendant member on hinge connected to bracket above rod-like member and lifting means for impact weight lifting. Lifting means has body with chamber into which distribution member is arranged and working chamber for compressed air formed into lifting means body by membrane. Membrane has orifice for compressed air discharge. Lifting means body includes channel for compressed air movement from pipeline and orifice for compressed air supply from chamber into which distribution member is located into working chamber. Impact weight interacts with membrane and also with distribution means through above orifices for compressed air discharge into membrane and for compressed air supply to lifting means. Membrane is formed as truncated cone. Distribution means is formed as spring-loaded shut-off valve. According to the second variant guiding means for impact weight movement is formed as vertical tube with cap, which are connected to lifting means body. EFFECT: increased operational efficiency due to increasing compressed air pressure on impact weight, increased reliability due to simplified structure. 3 cl, 5 dwg