Abstract: Track driven machines useful in slip form and other road paving operations embodying a support frame, with hollow frame members serving as cooling reservoirs for hydraulic fluid, supported by hydraulic cylinders on a pair of power driven, endless tracks. The frame is maintained in a pre-oriented plane as the machine moves along terrain by a hydraulic fluid control system operating cylinders in response to torsion bar-registered twist of the frame, string-line feeler means and a level controller. Two winches driven by respective hydraulic motors are mounted ahead of each track. Cables wound thereon may be attached to stationary objects to provide auxiliary forward drive(s) for each track, or in emergencies as the replacement drive for a disabled track.

Abstract: Machines for spreading wet concrete pavement and/or laying reinforcing rods in the spread wet concrete embodying a main frame movable along a subgrade for pavement by power-driven endless tracks, one or two power-driven, transverse, rotatable augers for spreading wet concrete laterally between slip form side plates and ahead of a height-adjustable strike-off blade or plate on the frame, said side plates optionally including plates projecting forwardly of the machine from opposite sides thereof, and a cross plate extending transversely between respective forward portions of said plates to define a three-sided enclosure into which wet concrete to be spread by said machine may be dumped, and a plurality of height-adjustable, side-by-side, substantially horizontal tubes extending in the forward-to-rearward direction and along the lower side of said three-sided enclosure at a level at which reinforcing rods, which pass through said tubes, are to be placed in the spread wet concrete, the rearward, exit ends of said