Road structure – process – or apparatus – Apparatus – Material distribution means
Reexamination Certificate
1999-05-12
2001-02-27
Lillis, Eileen D. (Department: 3673)
Road structure, process, or apparatus
Apparatus
Material distribution means
C404S101000, C404S108000
Reexamination Certificate
active
06193438
ABSTRACT:
The present invention relates to paving machines, and more particularly to paving machines having a hopper for receiving paving material from a loading vehicle.
Paving machines or “pavers” generally include a front-mounted hopper for receiving paving material and a rear-mounted screed which floats on the material to be paved. The screed is articulated on the chassis of the paver via tension arms. Paving material is deposited into the hopper by a separate “loading” vehicle and is conveyed from the hopper by means of a longitudinal conveyor device to a distributor auger located in front of the screed. The material is distributed over the paving width by the distributor auger and is paved or leveled by means of the screed.
The loading vehicle is placed in front of the paving vehicle and is pushed by the paver until all the material to be paved has been emptied into the hopper. The loading vehicle is then exchanged with another loading vehicle having a full load of paving material.
It is known, such as disclosed in German Patent No. DE 297 12 038 U1, to carry out “hot paving” of at least the two upper asphalt courses or layers in order to increase the degree of compaction and minimize the ageing of the binder present in a wearing course. Two pavers, traveling one behind the other in combination, are used in this case. So that the rear or following paver can be supplied with paving material from the front paver, an additional hopper and an additional conveyor device are mounted on the chassis of the “front” paver (i.e., front with respect to the paving direction). The additional hopper can be pivoted away laterally or in the direction of travel, so that the hopper of the front paver and the additional hopper can be alternately loaded by a loading vehicle. The additional conveyor device is used to convey paving material, as the front paver is performing a paving operation, from out of the additional hopper on the front paver and into a hopper of the rear or following paver. The additional conveyor device includes one or more conveyors connected one behind the other in succession and is guided laterally past the chassis or over and beyond the chassis. Such an additional conveyor system necessitates a considerable outlay in terms of construction.
The object of the invention is to provide a paver which has a simpler design for the supply of a following paver.
SUMMARY OF THE INVENTION
In one aspect, the present invention is a paver which is provided with two longitudinal conveyor devices guided through a shaft between a hopper and a distributor auger located in front of the screed in the paving direction and with an additional conveyor device for loading a hopper of a following paver, one of the longitudinal conveyor devices is extended at the outlet of the shaft beyond the screed to the additional conveyor device and is arranged, or is adjustable, with its discharge end at hopper loading height. This makes it possible to load a paver following is in the paving direction from the same hopper which serves for receiving material to be paved for the screed of the leading paver, so that there is no longer any need for an additional hopper. Moreover, a complicated lateral arrangement of the additional conveyor device is avoided and its design is simplified.
Preferably, the hopper of the front paver comprises two hopper halves which are each pivotable about an axis running adjacently to the longitudinal conveyor devices in the paving direction. Preferably, a lateral conveyor device arranged on the bottom side is provided in each of the hopper halves. The lateral conveyor makes it possible for two loading vehicles to move simultaneously one in front of each hopper half in each case, the hopper halves being emptied into the respective hopper halves located behind them.
REFERENCES:
patent: 3997277 (1976-12-01), Swisher, Jr. et al.
patent: 5035534 (1991-07-01), Brock et al.
patent: 5529434 (1996-06-01), Swisher, Jr.
patent: 5735634 (1998-04-01), Ulrich et al.
patent: 3834313 A1 (1990-04-01), None
patent: 297 15 467 U1 (1997-10-01), None
patent: 297 12 038 U1 (1998-01-01), None
ABG Allgemeine Baumaschinen-Gesellschaft mbH
Hartmann Gary S.
Lillis Eileen D.
Ussai Mark A.
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