Hydraulic puller apparatus

Details Hydraulic puller apparatus Hydraulic puller apparatus

2005-12-20

2005-12-20

Wilson, Lee D. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Pipe or rod jack

Lifter

C254S13300A

Reexamination Certificate

active

06976670

ABSTRACT:
A hydraulic puller apparatus for extracting objects from the ground, including objects anchored in a concrete slug, includes a pair of hydraulic jacks, each having a ram with an elongate lift arm pivotally connected at an upper end thereto; and a puller head having a pair of jaw support platforms disposed on opposite sides of a generally U-shaped opening. A pair of jaws each mounted on a respective jaw support platform are moved by respective drive screws to grip opposite sides of the object. The puller head is positioned with its opening straddling a lower end of the object, the jaws are engaged on opposite sides of the object, the jacks are placed on opposite sides of the object, and the lift arms are engaged in opposed ends of the puller head. Then the jacking mechanisms of the jacks are actuated, preferably simultaneously, to extend the rams and extract the object.

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patent: 6712147 (2004-03-01), Dallas
patent: 2002/0063245 (2002-05-01), Salman

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