Vertical power pulling device

Claim 1

A pulling device for use in withdrawing well points and the like comprising: a boom; a column fixedly mounted at an outer end of said boom; means for adjustable positioning of said column adjacent a well point to be withdrawn from the ground; means for disposing said column vertically during a well point pulling operation; a gripping carriage mounted for vertical movement along said column; said carriage comprising: a base plate having a face surface; mounted upon the face surface of said base plate in alignment with the center plane of said column, and spaced from the plane of the base plate surface, a first, fixed jaw comprising first and second vertically spaced apart first jaw elements, each said first jaw element defining an arcuate, well point-engaging surface; a second jaw mounted upon the face surface of said base plate, said second jaw comprising first and second vertically spaced apart second jaw elements, each said second jaw element defining an arcuate well point-engaging surface; and means mounted upon the face surface of said base plate for horizontal movement of said second jaw relative to said first jaw along the face surface of said base plate for disposing the arcuate surfaces of said first and second jaw elements in gripping engagement about a well point to be removed, said means for horizontal movement of said second jaw comprising a sleeve fixedly mounted upon the face surface of the base plate, a beam disposed for axial movement within said sleeve, said second jaw being fixedly joined to said beam, and power means connected to said second jaw for axially moving said beam and attached second jaw horizontally relative to said first fixed jaw; and powered means for moving said carriage vertically along said column.