The Charles Machine Works, Inc.

Fred H Kohman

Kenneth W Schuermann

Bradley W Hise

R Brian Holdeman

Greg T Harrison

A wrench (10) is disclosed for breaking a threaded connection between first and second pipe sections (14, 16) having wrench flats (18). A first jaw (20) is pivotally secured to a first torque arm (22) and slid over the wrench flats of the first pipe section. A second jaw (54) is pivotally secured to a second torque arm (56) and slid over the wrench flats of the second pipe section (16). A threaded rod (70), with a handle (72) thereon, is threaded between the distal ends of the torque arms so that the distal ends of the torque arms can be brought together by rotating the threaded rod with the handle to break the connection. The jaws (20, 54) are interchangeable and jaws of different size can be used to fit pipe sections of different diameter. Further, the jaws have a plurality of pivot pin apertures (26-38) around their circumference to permit the jaws to be adjusted on the torque arms to position the jaw on the wrench flats of the pipe sections. A fine adjustment is provided by using a pair of pivot pin apertures (46, 48) on the torque arms.

Screw drive tool joint wrench

A foot for the stabilizer arm of a backhoe or like construction equipment having a plurality of ground-engaging faces suitable for use in stabilizing with different ground surfaces. The foot comprises a detachable pad which may be pivotally attached to the stabilizer arm and retained in selected different orientations, with each orientation providing a different ground-engaging face.

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Perry, OK, United States of America

Fred H Kohman