Ralph Perry Miller

US Patent:

51730111, Dec 22, 1992

Filed:

Oct 25, 1991

Appl. No.:

7/782495

Inventors:

Frank J. Daniel - Arlington TX
Rickey A. Hofmann - Midlothian TX
Ralph M. Miller - Poynor TX

International Classification:

E02D 500

US Classification:

405230

Abstract:

A portable apparatus adapted to be moved to the edge of a concrete pad that needs to be restored to a horizontal condition. The apparatus includes a generally upright frame and a lifting platform that is attachable to the bottom of the frame (with bolts or the like). The platform has a forwardly projecting shelf that is placed under an exposed edge of the pad. A pair of hydraulic cylinders are mounted on the frame for selectively pushing downward on a yoke. Reaction loads from the downward push on the yoke are accommodated by the concrete pad. A chuck is mounted on the yoke for the purpose of engaging a generally linear member that is pushed into the ground to create a deep "foundation" for lifting the concrete pad with respect to the surface. A preferred linear member for this purpose is one or more sections of heavy reinforcing rod of the type that is commonly used to reinforce large concrete structures. A preferred rod is a Number 10 rod having transverse blisters on its surface and a nominal diameter of 1. 25 inches.