GROUND EXCAVATOR

PROBLEM TO BE SOLVED: To reliably form an enlarged-diameter part in part of a drilling hole while reducing resistance from a ground when drilling a hole in the ground to be larger than the diameter of an excavation rod.SOLUTION: A ground excavator has an enlargement excavation member 4 which is a me...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	MOCHIMATSU TOSHIO, MAKITA KOSUKE, TSUKADA YOSHIAKI, MAEJIMA TADASHI, MAKIEDA TAKEFUMI, YAMADA MASATO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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