Abstract: A borehole operating tool such as an underreamer or milling tool for performing borehole expanding or cutting operations in an oil well borehole, the tool including an elongated cylindrical housing having a main bore and side openings in which expandable arms are mounted for pivotal movement between closed and opened positions by a pivot pin; a piston element is mounted within the main bore of the housing for moving to an actuated position holding the expandable arms in an outer, expanded position; and a rotary fluid housing is mounted within each expandable arm about the hinge pin and includes a body nozzle for receiving fluid from the body and an expandable arm nozzle for directing fluid into a bore which extends through the expandable arm to thereby provide circulating fluid outwardly of the expandable arm in order to keep the operating outer end area of the expandable arm from becoming clogged.

Abstract: A load carrying fork for use with an industrial truck is disclosed. The fork is of generally L-shaped configuration and has a thickened tapered outside heel section. The inside intersect of the vertical and horizontal shank of the fork defines an undercut of relatively large radius. The longitudinal axis of the undercut, which is transverse to the longitudinal axis of the vertical and horizontal shanks, is slightly concave.