Abstract: A power torque wrench tool for applying tension to trusses of the type used in coal mines, consisting of a pair of parallel rods with their adjacent end portions passing through parallel apertures in a truss rod attaching block and threaded at their ends to permit nuts to be attached to their respective ends at opposite ends of the attaching block for holding the truss rods in tensile relationship with each other at a predetermined tension, comprises an elongated body having a notch at one end to receive the rod adjacent to that on which a nut is to be tightened, a nut receiving socket rotatably journaled in the housing, a rotary hydraulic motor with its rotor rotatably journaled in the housing and operatively connected to the wrench to rotate the same, a pair of handles projecting downwardly from the bottom of the housing and an upwardly inclined extension on the side of the housing remote from the alignment notch for reacting engagement with the roof of the mine during operation of the device, the socket ex

Abstract: A camper has a rigid roof structure mountable for travel atop a vehicle, legs pivoted at their upper ends to the roof structure and swingable from horizontal traveling positions along the sides of the roof structure to generally upright positions supporting the roof structure from the ground, the roof structure mounting vertically movable floor structure and collapsible intermediate structure stored in collapsed travel position between said roof and floor structures, and selectively controlled power driven means operatively connecting the floor and roof structures for lowering the floor structure from the roof structure and extending the collapsible intermediate structure to operative condition and raising the floor structure to the roof structure and collapsing the intermediate structure into traveling position.