Expansible mandrel with an external, cable actuating winch

Details Expansible mandrel with an external, cable actuating winch Expansible mandrel with an external, cable actuating winch

1976-09-23

1978-02-21

Shapiro, Jacob

E02D 730

Patent

active

040745392

ABSTRACT:
An expansible mandrel, for use in driving a tubular pile, has the pile-entering relationship of its lengthwise arcuate sections established by cable actuated means with separate cable actuated means operable to effect the pile-gripping relationship of the mandrel sections. One of the cables, in the disclosed embodiment, the retraction cable, is operated by a winch mounted on the outside of the mandrel at its upper end and driven in a winding direction by a motor, in the disclosed embodiment, an hydraulically operated motor.

REFERENCES:
patent: 3625013 (1971-12-01), Guild et al.

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