CRANE BOOM TIP DIRECT-COUPLED EARTH AUGER DEVICE

PROBLEM TO BE SOLVED: To provide a crane boom tip direct-coupled earth auger device employing the tare weight of an earth auger and the tare weight of a crane boom as the pressing force for an excavation. SOLUTION: An earth auger device is directly connected to the tip of the crane boom of a hydraul...

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Bibliographische Detailangaben
1. Verfasser:	OHORI MASATO
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a crane boom tip direct-coupled earth auger device employing the tare weight of an earth auger and the tare weight of a crane boom as the pressing force for an excavation. SOLUTION: An earth auger device is directly connected to the tip of the crane boom of a hydraulic truck crane. A by-pass pipe line 2 directly communicated with an oil tank D from an oil in/outlet 1a is provided on an erect side main pipe line 1 connected to the oil in/outlet 1a of the erecting double acting cylinder A of a boom erecting hydraulic circuit C erecting/lowering and expanding/shrinking the crane boom. An opening/closing valve 3 and a variable throttle valve 4 are provided in series in the by-pass pipe line 2.