Helical drill bit for an auger of a ground excavation assembly, in particular for building excavated piles, and drilling method that uses such a bit
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United States of America Patent
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Oct 13, 2015
Grant Date -
Nov 7, 2013
app pub date -
May 2, 2013
filing date -
May 7, 2012
priority date (Note) -
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Abstract
The helical drill bit defines a helical end section of a helical structure formed at its periphery by an auger of an excavation assembly, and it is associated or associable with a support portion of the auger. Such a support portion defines a proximal section of the helical structure, which has an extension substantially centered around a longitudinal axis (X-X). The helical drill bit is adapted to rotate about the longitudinal axis (X-X) together with the support portion so as to drill a hole in the ground. The helical end section extends around an extremity axis (Y-Y; Ψ-Ψ) that is not aligned relative to the longitudinal axis (X-X).
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