KELLY FOR THE REALIZATION OF BORED PILES
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United States of America Patent
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N/A
Issued Date -
Dec 1, 2011
app pub date -
May 24, 2011
filing date -
May 25, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A kelly for the realization of bored piles, has a battery of rods (7, 19) displaceably inserted the one into the other and wherein the most inner one (9) supports an excavation tool (5); a rotary table (1), vertically sliding along the drilling mast (2) of the operating machine (3) which bears the kelly, is provided with a rotator (8a) adapted for putting into rotation the battery of rods (7, 19) around its longitudinal axis; a device (10) adapted for displacing and recompacting the rods of the battery and a motor(6) adapted for exerting a traction and a thrust on the rods during the excavation are also provided At least part of the rods (19) of the battery is entirely positioned under the rotary table (1) by which it is put in rotation.
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