CYCLE HAMMER FOR DRILLING HARD ROCK GROUND

PROBLEM TO BE SOLVED: To provide a cycle hammer housing a plurality of air hammers, in which a drilling bit of each of the air hammers can be uniformly abraded on its entire peripheral surface, while occurrence of action deficiencies caused by flow of small pieces such as a packing material, a small...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	HOSHI YOSHIYUKI, HOSHI TADAO, HOSHI HIROYUKI, HOSHI RIKIO, HOSHI FUMIO
Format:	Patent
Sprache:	eng
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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