US 6,273,636 B1Granted

Edge-forming device for a screed assembly

AssigneeBlaw-Knox Construction Equipment Corporation

InventorDavid B. Johanpeter

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Abstract

An edge-forming device is used with a screed assembly having lateral ends and a screed plate extending between the lateral ends, the screed plate having a generally horizontal working surface, and a generally horizontal centerline. The edge-forming device includes a frame connected with a lateral end of the screed assembly and a plate disposed below the frame. The plate has a horizontal working surface and extends outwardly beyond the screed assembly lateral end. An adjustment mechanism is connected with the frame and with the edge-forming plate and displaces the plate with respect to the frame to adjust a vertical position of the edge-forming plate with respect to the screed plate such that the plate forms a vertical step in a mat of material paved by the screed assembly proximal to an edge of the mat. The adjustment mechanism also pivots the plate to adjust the taper angle of the vertical step in the mat and also to adjust the angle of attack of the plate. The adjustment mechanism includes a bracket attached to the frame and a pair of movable supports connected with the bracket and displaceable vertically with respect to the frame. Four connective members, preferably turnbuckles, each have a first end connected with one of the supports and a second end connected with the edge-forming plate. The second ends are displaceable vertically with respect to the supports to displace to the attached portions of the plate.

Claims15

Dependent claims

An edge-forming device for a screed assembly having lateral ends and a screed plate extending between the lateral ends, the screed plate having a generally horizontal working surface, the edge-forming device comprising:

a frame connected with one of the lateral ends of the screed assembly;
a plate disposed generally below the frame, having a generally horizontal working surface and extending outwardly beyond the screed assembly lateral end such that the edge-forming plate working surface and the screed plate working surface are spaced laterally from each other;
and
an adjustment mechanism connected with the frame and with the edge-forming plate, the adjustment mechanism including first and second movable supports that are spaced horizontally from one another, first and second connective members each being connected at a first end to the first movable support and at a second end to the plate, each second end of the first and second connective members being displaceable vertically with respect to the first movable support such that displacement of the first connective member second end with respect to the second connective member second end adjusts an angle between the edge-forming plate and the screed plate, third and fourth connective members each being connected at a first end to the second movable support and at a second end to the plate, each second end of the first and second connective members being displaceable vertically with respect to the second movable support such that displacement of the third connective member second end with respect to the fourth connective member second end adjusts an angle between the edge-forming plate and the screed plate, the adjustment mechanism being configured to displace the plate with respect to the frame to adjust a vertical position of the edge-forming plate with respect to the screed plate such that the edge-forming plate can be positioned vertically lower than the screed plate so as to form a vertical step in a mat of material paved by the screed assembly proximal to an edge of the mat.

1 more element

An edge-forming device for use with a screed assembly, the edge-forming device comprising:

a frame connectable with the screed assembly,
an edge-forming plate disposed generally below the frame;
and
an adjustment mechanism adjustably connecting the plate with the frame and including:
a base attached to the frame;
first and second connective members spaced apart horizontally from each other, each of the first and second connective members having a first end connected with the base and a second end connected with the edge forming plate, each second end of the first and second connective members being vertically displaceable with respect to the base such that displacement of the two second ends in a same vertical direction adjusts a vertical position of the edge forming plate with respect to the frame and vertical displacement of one second end with respect to the other second end adjusts the orientation of the edge forming plate with respect to the frame;
and
third and fourth connective members spaced horizontally apart from each other and the first and second connective members, each of the third and fourth connective members having a first end connected with the base and a second end connective with the edge-forming plate, each second end of the first and second connective members being vertically displaceable with respect to the base such that displacement of the two second ends in a same vertical direction adjusts a vertical position of the edge forming plate with respect to the frame and vertical displacement of one second end with respect to the other second end adjusts the orientation of the edge forming plate with respect to the frame.

5 more elements

Dependencies are inferred from the claim text.