Methods of setting roadmaking material and smoothing screeds for performing such methods
AssigneeMaschinenfabrik Klaus-Gerd Hoes
InventorTheodor Bruns
Life of this patent
Estimating the term…
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.
Claims2
A method of setting roadmaking material when renewing the surface of a road pavement, which has been damaged by track or depressions worn therein by means of a road finishing machine which has a smoothing screed of adjustable working width and ridge profile, said method comprising the steps of:
- adjusting said smoothing screed to provide it with a negative ridge profile;
- and
- bending back positively each of the free ends of said smoothing screed, from which free ends adjusting screeds for varying said working width may be drawn out;
- whereby said smoothing screed sets said roadmaking material with two portions of increased depth corresponding to said positively bent-back free ends.
A smoothing screed for use with a road finishing machine in setting roadmaking material when renewing the surface of a road pavement, which has been damaged by tracks or depressions worn therein, comprising:
- a central main screed having at least two screed sections each having an inner and outer lateral end, said screed sections being spaced-apart and being disposed laterally side by side with respect to one another with the inner lateral ends thereof disposed adjacent to one another;
- a common smoothing plate having a central section and two lateral ends, on which said two screed sections are disposed;
- a ridge profile adjustment device including an adjusting screw pivotably coupling said two screed sections together in the area adjacent to their inner lateral ends so as to permit said sections to be moved to an inclined position relative to one another and to, in turn, permit lateral bending of said common smoothing plate into a generally concave, depressed, negative ridge profile in the center section thereof;
- two adjusting screeds, each of which is mounted for lateral movement between a retracted and withdrawn position relative to the outer lateral end of one of said screed sections so as to vary the working width of said smoothing screed, each of said adjusting screeds being at least partially disposed on said common smoothing plate;
- and
- two supplementary ridge profile adjustment devices, each of which include an adjusting screw, which are each disposed adjacent to an opposite outer lateral end of said screed sections for pivotably coupling said adjusting screeds to said screed sections so as to permit said screed sections and adjusting screeds to be moved to an inclined position relative to one another and to, in turn, permit lateral bending of said smoothing plate into a generally convex, raised, positive profile adjacent the lateral ends thereof.
Dependencies are inferred from the claim text.