Implements or apparatus for applying pushing or pulling force – Pipe or rod jack – Lifter
Reexamination Certificate
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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Starr, II Stephen Garrett
Woolley Brent Alan
Roddy Kenneth A.
Wilson Lee D.
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