DEVICE FOR RAMMING LOOSE MIXTURE WHEN INSTALLING PILE Russian patent published in 1995 - IPC

FIELD: construction; erection of piles foundation. SUBSTANCE: device for ramming loose mixture has percussive part consisting of main section 7 fastened to body and having through hole 8, and movable section 10 located in recess 9 of main section for vertical motion and secured to rod passing through hole 8. Rod has shutoff valve 12 on its free end. Body water reservoir 14 located above percussive part and furnished with level gage 15 and communicated through shutoff valve 12 with hole 8 of main section 7. Body is additionally provided with chamber for accumulation of water portion for moistening rammed portion of loose concrete mix. Chamber is communicated through shutoff valve 12 of movable section 10 with hole 8 of main section of percussive part and piston with packing ring having holes communicated with water reservoir and through check shutoff valves with chamber for accumulation of water portion. Volume of this chamber is preset by varying length of rod 11. EFFECT: higher efficiency. 2 cl, 7 dwg