Abstract: The canal paving machine has an elongated main frame supported in an elevated position on a pair of end frame structures each of which includes an upper mounting section, a lower traction section and an intermediate connecting section. One mounting section is movably supported on the main frame for movement longitudinally thereof to vary the longitudinal spacing between the end frame structures. Each traction section has front and rear traction units movably connected together to vary the spacing therebetween transversely of the main frame. The connecting section is vertically adjustable relative to the traction section and the upper mounting section is vertically adjustable relative to the connecting section. During a paving operation the upper sections are retracted relative to the connecting sections and the main frame adjusted relative to the ground surface by vertical adjustment only of the connecting sections.

Abstract: The method and power transmission system of this invention for driving a road planar machine has the cutter unit in a positive mechanical drive with the drive shaft of a machine power unit through a hydraulically actuated clutch mechanism. The wheel traction units for the machine are continuously driven from the power unit by hydraulic motors operated by variable volume displacement pumps. A control system for retaining the power unit at a set rotational speed required for a predetermined cutting or planing load is responsive to a drop in the set rotational speed, resulting from the cutting unit encountering an overload, to actuate the variable displacement pumps to decrease the forward speed of the machine without appreciably reducing the rotational inertia force of the cutting unit. If the cutting unit overload is of a short duration or momentary the set rotational speed of the power unit is resumed.

Abstract: This invention pertains to a method and machine for slip forming concrete wall structures such as median barrier walls for highways. The slip form comprises a pair of opposite side walls each of which has a skirt member retractable and extensible relative to the lower portion thereof. A top wall separate from the side walls is mounted on the machine frame between the upper portions of the side walls, and each side wall and associated skirt member is movable as a unit relative to the top wall and each skirt member is independently movable relative to an associated side wall. The side walls are adjustably supported on the machine frame for adjustment laterally of the machine frame to accommodate top walls of varying widths and the top wall is verticaly adjustable relative to the machine frame independently of the side walls.