Laying plank for a road finishing machine

Road structure – process – or apparatus – Apparatus – Screed or drag

Patent

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Details

E01C 1922

Patent

active

049919954

ABSTRACT:
The invention relates to a laying plank for a road finishing machine comprising a basic plank (1) which exhibits two central upright cheeks (2) to which an extension cylinder (3) is attached on each side which guides an inner movable cheek (8) of an extensible plank (4) for the lateral prolongation of the basic plank (1) and engages an outer movable cheek (5) for extending, at least one guide rod (6) parallel to the cylinder axis being provided respectively between inner and outer movable cheeks (5, 8), which is guided by an outer cheek (7) connected firmly to the basic plank (1). In order that the extensible planks can be extended by half the width of the basic plank, it is provided that at least two guide rods (10, 11) parallel to the cylinder axis are arranged outside the region of the outer stationary cheek (7) between inner and outer movable cheeks (5, 8), which guide two guide cheeks (12) arranged at a mutual interval and connected to the extensible plank (4), a guide rod (11) being embraced by a cylinder (13) connected to the guide cheeks (12) and provided with an annular piston (14) stressable on both sides, and the stroke of the cylinder (13) corresponding substantially to the interval between the inside of the inner cheek (8) and the outside of the basic plank (1) in the extendded state of the extensible plank (4).

REFERENCES:
patent: 3957384 (1976-05-01), Lamb et al.
patent: 3992124 (1976-11-01), Schrader
patent: 4272213 (1981-06-01), McGovarin
patent: 4345852 (1982-08-01), Goto et al.
patent: 4379653 (1983-04-01), Brown
patent: 4702642 (1987-10-01), Musil

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