Abstract: The present invention uniformly spreads a topping material over a wet concrete surface and includes a spreader, a bridge and a drive system. The spreader stores a supply of topping material and dispenses a uniformly wide layer of the topping material as it is translated along the bridge. The bridge supports the spreader above the wet concrete surface and spans the entire width of the concrete surface. The drive systems translates the spreader across the bridge to dispense a uniformly wide layer of topping material over the concrete surface. Sequential lateral translations of the spreader across the bridge followed by sequential lateral translations of the bridge along the length of the concrete surface covers the entire concrete surface with a uniform layer of topping material.

Abstract: A triangular truss screed includes a frame having first and second ends and a top support member which forms the apex of the triangular truss. Front and rear screed blades extend between the first and second ends of the screed frame and are coupled in a spaced apart relationship to the lower portion of the front and rear of the frame. The front and rear screed blades each include a flat lower surface and form the front and rear edges of the triangular truss frame. A pan float finisher is coupled to the flat lower surface of the front and rear blades and includes a length substantially equal to the length of the screed frame and a width greater than the spacing between the front and rear blades. A vibration generating mechanism is coupled to the screed to vibrate the pan float finisher.

Abstract: A vibratory concrete screed includes a generally triangular, open support frame to which front and rear screed blades are coupled. Air vibrators are coupled at intervals along the front and rear screed blades to impart vibratory motion to the blades. First and second end brackets are coupled to the screed top pipe and to the front and rear screed blades and include first and second side members which define a plane oriented perpendicular to the front and rear screed blades. A vertically and horizontally adjustable extension bracket is coupled to the first and second side members of the end bracket of the screed and is maintained in a plane perpendicular to the plane defined by the first and second side members of the end bracket.

Abstract: A high density concrete placer is longitudinally translatable along a pair of parallel oriented support rails positioned adjacent to an area in which wet concrete has been poured. The concrete placer includes a bridge having first and second ends and first and second roller assemblies coupled to the first and second ends of the bridge. The roller assemblies contact the support rails and enable the bridge to be longitudinally translated along the support rails. A frame includes a plurality of immersible vibrator units which are coupled at spaced apart intervals along one side of the frame and descend vertically downward therefrom. A rolling table is coupled to the bridge and to the frame to be laterally translated between the first and second ends of the bridge. The frame includes a subframe which is vertically displaceable between a first and a second position and serves to vertically displace the vibrator units between a first and a second position.

Abstract: A fine grader for fine grading the surface of the subgrade on which fresh concrete is to be poured to form a uniformly level surface for receiving freshly poured concrete is formed by coupling together a fine grader attachment with a vibratory screed. The screed includes first and second ends and first and second end brackets which are coupled to the first and second ends of the screed frame. A winch is coupled to each end bracket for translating the screed along the length of the side forms. The fine grader attachment for the screed includes a fine grader blade, a series of brackets coupled to the screed frame and to the fine grader blade for maintaining the blade in a grading position below and in front of the screed.