HAMMER GRAB

PROBLEM TO BE SOLVED: To provide a hammer grab capable of decreasing frictional resistance of a swivel mechanism. SOLUTION: A hanging shaft body 2 comprising upper-side large-diameter shaft portion 3 and a lower-side small-diameter shaft portion 4 is provided: a cylindrical base frame 5 rotatably co...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	TOKIMUNE AKIRA
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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