Abstract: A knock-down vibrating concrete screed comprises elongate screed units attachable end-to-end in a longitudinally extending row to provide a screed of desired length. Ones of the screed units each comprise an elongate frame unit movable transversely over the concrete and vibration apparatus for vibrating the corresponding frame unit for smoothing the concrete over which the frame unit moves. The adjacent ends of the screed units positively block coaxially longitudinal movement of adjacent screed units into attached relation with each other. The adjacent ends of the screed units also block strictly coaxial longitudinal movement of attached screed units out of attached relation with each other.

Abstract: A slip-form machine for concrete curb and gutter includes a chassis having wheels adjustably mounted for guiding the machine along fixed straight or curved tracks. A concrete receiving hopper carriers a vibrator support unit adjustable linearly and pivotally about several axes. Interchangeable forms each attach to the chassis behind the hopper to receive concrete therefrom and have sidewalls extending downward below the wheels and substantially to the ground. A hand winch fixed above the hopper has cable guided out the forward lower hopper portion for advancing the machine and is energized by an operator standing on a chassis mounted platform above the form. A trowel is vertically adjustably fixed to the rear of the form and is separated from it by a substantially constant bubble escape gap. A reinforcing guide rod unit is releasably fixable to the lower front wall of the hopper.