Tool driving or impacting – Advance causing or controlling means – Motor causes or controls advance
Patent
1979-11-08
1981-11-24
Feldbaum, Ronald
Tool driving or impacting
Advance causing or controlling means
Motor causes or controls advance
E02D 710
Patent
active
043018742
ABSTRACT:
Pile or sheet-pile driver comprising a vertically movable member to be vertically driven by a hydraulic cylinder supporting a vertically movable chucking device having a pair of chucking fingers to be brought close to or away from each other by the hydraulic cylinder; an elastic member and longitudinal vibrators installed between the vertically movable member and the chucking fingers. The chucking device is designed such that a pile or a sheet-pile held upright can be placed sidewise into position between the chucking fingers.
REFERENCES:
patent: 3502160 (1970-03-01), Herz
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