Road structure – process – or apparatus – Apparatus – Material distribution means
Reexamination Certificate
1999-02-25
2001-10-30
Will, Thomas B. (Department: 3673)
Road structure, process, or apparatus
Apparatus
Material distribution means
C404S118000
Reexamination Certificate
active
06309138
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a paving method for paving and laying paving materials such as an asphalt materials onto the surface of a road, and a paving machine which can be used in this method.
This application is based on patent application No. Hei 10-48210 filed in Japan, the content of which is incorporated herein by reference.
2. Description of the Related Art
The machine shown in
FIG. 6
has been proposed as a paving machine (Published Japanese Translation No. Hei 9-505370 of PCT International Application). In this paving machine, there are provided, on a self propelled vehicle
81
, a front hopper
82
and rear hopper
83
for storing the paving materials, front spreading screw
85
to spread the paving materials Ha sideways, such as an asphalt materials, fed from the front hopper
82
by the feeder (not shown), rear spreading screw
87
to spread sideways the paving materials Hb fed from the rear hopper
83
by the feeder
86
, front screed
88
for laying and paving onto the road surface the paving materials Ha spread sideways by the front spreading screw
85
, and rear screed
89
for laying and paving the paving materials Hb spread sideways by the rear spreading screw
87
. In this paving machine, rear hopper
83
, feeder
86
and front screed
88
are added to a conventional paving machine which is provided with front hopper
82
, the feeder and rear screed
89
.
By using this paving machine, in one paving operation, it is possible to lay and spread on a road surface two types of paving materials Ha and Hb layered in upper and lower layers.
However, conventional paving machines, and the newly proposed paving machine of
FIG. 6
, have limitations in paving roads of high durability at low cost.
It is therefore the object of the present invention to provide a paving machine and paving method which can pave, at low cost, road surfaces of high durability.
SUMMARY OF THE INVENTION
In order to achieve the above goal, the present invention is constituted so that, as a self propelled vehicle equipped with the hopper and screed moves forward, in the paving method for spreading and laying and paving onto the road surface the paving materials in the hopper using the screed, two or more types of paving materials are spread onto the road surface at the same time by the screed, forming three or more strips alternating sideways, i.e. crossing to the direction of movement of the self propelled vehicle.
By this constitution, for example, it is possible to lay and pave on the road surface an expensive paving materials having excellent durability for the bands where the left and right tires of cars make contact, and an ordinary inexpensive paving materials for the band between said bands and to the outside of said bands. For pavement made according to this method, the durability is improved, because the bands which are prone to wear by the passage of cars can be laid and paved with a paving materials with excellent durability. In addition, by using the expensive paving materials selectively for the bands which are prone to damage, and using inexpensive paving materials for the bands which are not prone to wear, expensive paving materials are economized, and operational expenses are reduced. As a result, according to the present invention, it is possible to lay and pave the paving materials having excellent durability at a low cost.
In the above paving method, it is also possible to use a construction which controls the breadth and/or the position of the paving of the paving materials spread onto the road surface by a spreading screw, by a bottom plate attached to the spreading screw.
By this construction, the width and position of the strips of paving materials can be adjusted easily and precisely by a simple structure.
Further, in order to perform the above paving method, in the present invention, the paving machine on the self propelled vehicle is equipped with a first hopper and a second hopper for storing the paving materials, a front spreading screw for spreading the paving materials supplied from said first hopper sideways, a rear spreading screw for spreading the paving material supplied from said second hopper sideways, and a screed for simultaneously laying and paving the paving materials spread by said front spreading screw and the paving materials spread by said rear spreading screw, and a bottom plate for controlling the breadth and/or position of the spread paving materials are attached to at least one of said front spreading screw and said rear spreading screw.
In this paving machine, the spread width and/or position of the two types of paving materials supplied from the first hopper and second hopper are controlled by the bottom plate, and these two types of paving materials are spread onto the road surface by either spreading screw to form strips alternating sideways, and laid and paved by the screed to make a pavement.
In this paving machine, bottom plates are attached to each of the front spreading screw and the rear spreading screw, and it is preferable to have a total of three bottom plates. In this way, it is possible to lay and pave spreading three to five strips of paving materials, and it is possible to perfectly satisfy the requirements for ordinary paving.
Further, it is possible to make the bottom plates attachable and detachable, and extensible or retractable sideways. If the bottom plates are attachable and detachable, in addition to the above paving method, ordinary paving is also possible. If the bottom plates are constructed to be extensible and retractable sideways, it becomes easy to adjust the width of the spread paving materials. That is to say, by making the bottom plates attachable and detachable, and extensible and retractable sideways, it is possible to respond precisely and easily to a wide range of paving requirements.
REFERENCES:
patent: 3519169 (1970-07-01), Holland
patent: 4101237 (1978-07-01), Catanacci
patent: 4405089 (1983-09-01), Taylor
patent: 4749304 (1988-06-01), Craig
patent: 5405214 (1995-04-01), Campbell
patent: 5590976 (1997-01-01), Kilheffer
patent: 5641249 (1997-06-01), McClelland
patent: 5735634 (1998-04-01), Ulrich et al.
patent: 6050743 (2000-04-01), Medinger
patent: 6086287 (2000-07-01), Sharpe et al.
patent: 6113310 (2000-09-01), Hesse, Jr.
patent: 23 46 897 A1 (1975-04-01), None
patent: 295 10 058 U1 (1995-12-01), None
patent: 2 697 036 (1994-04-01), None
patent: Hei 9-505370 (1997-05-01), None
Goto Fumio
Hasebe Katsuro
Inagaki Tatsuoki
Izawa Ryuzi
Matsuura Chiaki
Addie Raymond W
Fish & Richardson PC
Niigata Engineering Co. Ltd.
Will Thomas B.
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