Abstract: In general, hand trucks are heavy metal devices which are somewhat expensive and difficult to manipulate. A simple, readily portable, collapsible hand truck includes a tubular rectangular frame, the corners of which are interconnected by similar pairs of upper and lower, inverted L-shaped brackets, the upper brackets pivotally supporting a tubular, generally C-shaped handle and the lower brackets pivotally supporting a tubular, generally C-shaped load supporting platform; a pair of bifurcated yokes rotatably mounted on the frame sides above the lower brackets for supporting a pair of wheels; and a crossbar pivotally mounted on the inner end of the axle of one wheel for rotation from a vertical storage position to a horizontal use position engaging the yoke carrying the other wheel, whereby the yokes and wheels can be releasably latched in the parallel use position perpendicular to the frame.

Abstract: A compact power swivel for well drilling rigs and the like, comprising a frame; a mounting bracket secured to the frame; a quill rotatable on an axis mounted to the bracket; a bull gear coaxially disposed on the quill for rotating the quill; a motor mounted to the bracket and including a shaft rotatable on an axis parallel to the quill axis; a spur gear coaxially disposed on the shaft and rotatable, therewith engaging the bull gear for rotating the bull gear and the quill thereby; a disc brake mounted to the bracket and co-operating with the shaft for controlling rotation of the shaft and the quill thereby; and a thrust bearing coaxially disposed on the quill and associated with the bracket, for permitting free rotation of the quill and for distributing to the bracket forces associated with displacement of the swivel.

Abstract: A cylindrical goods lifting and placement apparatus comprises a platform, an angularly disposable frame pivotably connected to the platform and having a drill pipe holding system for holding a length of drill pipe. An angularly displaceable member is pivotably connected to the platform and has a cylinder and piston assembly for angularly displacing the member from a first position substantially adjacent the holding system. Drill pipe grippers are connected to the member and the grippers are rotatable on an axis from a first position to a second position substantially aligned with the holding system. A drive system for rotating the pipe grippers is provided. Similarly, a drive system for operating the grippers is provided.