Hydraulic device for driving piles

PCT No. PCT/RU92/00161 Sec. 371 Date Feb. 17, 1995 Sec. 102(e) Date Feb. 17, 1995 PCT Filed Aug. 19, 1992 PCT Pub. No. WO94/04762 PCT Pub. Date Mar. 3, 1994.A hydraulic device for driving piles including a casing accommodating a striker with an anvil block, a hydraulic power cylinder, having a rod c...

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Hauptverfasser:	KUVSHINOV, VIKTOR A, ERMOLAEV, VLADIMIR M, GOLDOBIN, VYACHESLAV A, RUSIN, SERGEI V
Format:	Patent
Sprache:	eng
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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Zusammenfassung:	PCT No. PCT/RU92/00161 Sec. 371 Date Feb. 17, 1995 Sec. 102(e) Date Feb. 17, 1995 PCT Filed Aug. 19, 1992 PCT Pub. No. WO94/04762 PCT Pub. Date Mar. 3, 1994.A hydraulic device for driving piles including a casing accommodating a striker with an anvil block, a hydraulic power cylinder, having a rod connected to the striker and a hydraulic directional control selector. A control unit is separated from the directional control selector and is secured on a housing of the power cylinder coaxially with the striker. The hydraulic directional control selector comprises two valves, each of which is provided with two pilot chambers, communication pairwise with each other. The first valve puts the head end of the power cylinder in communication with the rod end, and the second valve establishes communication between the head end and the return flow line.