Abstract: A grip coupling (18) for tubular conduit has a coupling body (20) formed by two halves (22, 24) which are joined along weld lines (26). The two halves (22, 24) each include a tapered entrance section (28) and an interior seal (30). The interior seals (30) are disposed inboard of the tapered entrance sections (28). Two annular-shaped shoulders (32) are formed in the interior surfaces of each of the two halves (22, 24), and are spaced apart to face inboard relative to the respective two halves (22, 24) when the two halves (22, 24) are joined together. Two grip rings (36) are disposed within respective ones of the two halves (22, 24), fitting against respective ones of the two annular-shaped shoulders (32). The grip rings (36) have grip teeth (40) and are tapered to extend radially inward in an inboard direction relative to the body (20).

Abstract: A rugged maneuverable articulate mine service vehicle includes a power unit and a utility formed from welded steel plate, which units are interconnected by an articulated joint having a pivot axis and an axis of rotation. Each of the units has a pair of drive wheels with each drive wheel being powered by its own hydraulic motor. The power wheels are directly secured to the respective units. A hydraulic crane is pviotally mounted on the utility unit with the mast of the crane in close proximity to the articulated joint connecting the utility unit to the power unit. Hydraulic steering cylinders are connected between one of the units and the articulated joint and cause relative rotation of one unit of the vehicle about the pivot axis of the joint with respect to the other to steer the vehicle. Hydraulic outriggers are located at opposite corners of the front of the utility unit.