Showing papers on "Screed published in 1978"
Patent•
12 Jan 1978
TL;DR: A stirrup for supporting elongated guide bars or rods for concrete screeds or strike bars used in leveling poured concrete floors, pavement and the like is described in this paper.
Abstract: A stirrup for supporting elongated guide bars or rods for concrete screeds or strike bars used in leveling poured concrete floors, pavement and the like. The stirrup is vertically adjustably supported by a stud screw threaded in a base portion and extending upwardly from the base portion, the base portion being disposed to be embedded in a base slab.
23 citations
Patent•
13 Feb 1978
TL;DR: In this article, a self-propelled concrete screed machine is provided having a winch and cable propulsion system comprised of a pair of cable spools and two cables, one wound upon each spool, and level wind mechanisms providing a reciprocal guiding motion of the cables across the length of the spools, so that each cable will be received on its respective spool in a series of concentric layers.
Abstract: A self-propelled concrete screed machine is provided having a winch and cable propulsion system comprised of a pair of cable spools and two cables, one wound upon each spool, and a pair of level wind mechanisms providing a reciprocal guiding motion of the cables across the length of the spools, so that each cable will be received on its respective spool in a series of concentric layers comprised of multiple side by side wraps of the cable. A portable, easily disassembled, framework including: a main frame carrying the winch and cable system and its prime mover; a pair of outer frame members each carrying a cable guide pulley; and two pairs of screed board guide handles, one of which carries a remote prime mover control, are also provided. The concrete screed machine is guided across the concrete surface being screeded by an elongated guide shoe which slidingly engages a plurality of guide supports affixed to the surface upon which the concrete is being poured.
14 citations
Patent•
08 May 1978
TL;DR: In this article, a waste water filtration and sludge removal system for filtering and removing sludge materials suspended in water resulting from steel pickling and cleaning operations and the like is described.
Abstract: A waste water filtration and sludge removal system for filtering and removing sludge materials suspended in water resulting from steel pickling and cleaning operations and the like. The system includes a trough-like filtering tank having weep holes along the lower edge draining into an inclined channel for capturing filtered water for reuse, and also includes a multiple layer filter bed containing an upper layer of fine jagged surfaced particles for capturing filtered sludge. The sludge layer deposited on the surface of the upper filter layer is periodically moved by means of an adjustable screed blade toward an elevated discharge station for removal from the tank without significantly disturbing the filter bed. The screed blade may be automatically raised out of contact with the sludge layer when operated in the reverse direction.
10 citations
Patent•
24 Nov 1978
TL;DR: A smoothing screed is used with a road finishing machine for setting roadmaking material when the surface of a road pavement, which has been damaged by tracks or depressions worn therein, is renewed as discussed by the authors.
Abstract: A smoothing screed is used with a road finishing machine for setting roadmaking material when the surface of a road pavement, which has been damaged by tracks or depressions worn therein, is renewed. The smoothing screed is of adjustable width and profile and has a central main screed from which adjusting screeds may be drawn out laterally. There is further provided a central ridge profile adjustment device, which allows the central portion of the main screed to be adjusted so as to be lower than the ends of the main screed, and two further adjustment devices at the ends of the main screed, which allow the outer ends of the adjusting screeds to be adjusted so as to be lower than the ends of the main screed.
9 citations
Patent•
23 Aug 1978
TL;DR: In this paper, a vibratory-type screed bar support stake and method are adapted to concrete screeding operations utilizing vibratory type screed and a mating drive member facilitates easy placement of the stake.
Abstract: A screed bar support stake and method are uniquely adapted to concrete screeding operations utilizing a vibratory-type screed. The stake is formed with means which allow it to be located after the concrete has been poured and is also adapted with means enabling the stake to be removed for reuse before the concrete hardens thus saving the cost of the stake. A mating drive member facilitates easy placement of the stake.
7 citations
Patent•
27 Oct 1978
TL;DR: The leading screed structure has a worm type conveyor connected parallel to each wall of the V- or U-shaped screed as mentioned in this paper, which assures homogenity of the road construction mixture and reduces the inherent pressure of the mixture against the leveling elements.
Abstract: The present spreading apparatus for road construction mixtures, such as bituminous cold mixtures, has at least two V- or U-shaped screeding structures or screeds one leading and the other trailing with respect to the working direction. The leading screed extends tandemly, partially into the angle formed by the trailing screed. The leading screed structure has a worm type conveyor connected parallel to each wall of the V- or U-shaped screed. The worm type conveyor assures the homogenity of the road construction mixture and reduces the inherent pressure of the mixture against the leveling elements. Both the leading and the trailing screed are adjustably inclined away from the working direction. The adjustment of the screed position may be made, for example, by a spindle with a hand wheel.