Expansible mandrel

Details Expansible mandrel Expansible mandrel

E - Fixed Constructions

02

D

61/88

E02D 7/30 (2006.01)

Patent

CA 1063369

EXPANSIBLE MANDREL Abstract of the Disclosure An expansible mandrel for use in driving or withdrawing tubular piles has fluid pressure operated means both to effect the pile-gripping relationship of its sections and their retracted, pile-entering relationship, each including a plurality of sets of sheaves spaced lengthwise of the mandrel and from the sets of the other with a cable in such trained engagement there- with that a pull thereon by fluid pressure operated means effects the appropriate relationship of the mandrel sections.

271724

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