Conveyors: power-driven – Conveying apparatus entirely supported by mobile ground... – Including gravity conveyor section or bin with driven conveyor
Reexamination Certificate
2000-02-02
2001-11-06
Valenza, Joseph E. (Department: 3651)
Conveyors: power-driven
Conveying apparatus entirely supported by mobile ground...
Including gravity conveyor section or bin with driven conveyor
C198S302000, C414S332000, C414S919000, C241S101740
Reexamination Certificate
active
06311821
ABSTRACT:
The present invention relates to a material processing plant. More particularly, but not exclusively, the present invention relates to a material process plant adapted to be suspended between two separate wheeled units during transport. Examples of material processing plant with which the invention is concerned include a crusher or shredder, a screening device, and a combined crusher and screening device.
Screening plants are well known and typically comprise a plant frame and one or more discharge conveyors for discharging different fractions of screened material to different stock piles. Screening plants typically also comprise a propulsion means such as crawler tracks which make the plant readily manoeuvrable in a quarry but transport along a road usually requires the plant to be transported by a low loader. Although many screening plants can be folded into transport positions of reduced height or length, putting the plant on a low loader means that the screening plant is raised to a position high above ground level. The overall height of the low loader/screening plant combination can therefore be a problem when passing under bridges or along roads with overhanging trees.
Accordingly, in one aspect, the present invention provides a material processing plant adapted to be suspended between first and second separate wheeled units during transport,
the first unit having a respective first coupling;
the second unit having a respective second coupling;
the plant comprising
a plant frame;
a front coupling and a rear coupling provided at the front and rear of the plant frame respectively;
the front and rear couplings being arranged such chat when the front coupling is connected to the first coupling and when the rear coupling is connected to the second coupling, the plant is suspended between the first and second units; and,
a lifting or lowering means connected to one or both of said units, or to the plant frame, and operable to lift the plant for connecting the first coupling to the front coupling and the second coupling to the rear coupling.
The plant of the invention has the advantage that it can be connected to the two separate wheeled units to produce a transport device which is not as high as a material processing plant/low loader combination.
The plant can further comprise a locomotion means. The locomotion means can comprise crawler tracks. This has the advantage that the plant can be moved independently of the wheeled units.
Preferably, the lifting means comprises a front jack and a rear jack for lifting the front and rear of the plant frame respectively.
The front and rear jacks can be adapted to lift the front and rear of the plant frame independently. This has the advantage that the front of the plant can be lifted and connected to the first unit before the rear end of the plant is lifted.
In a preferred arrangement, the first wheeled unit is a tractor unit and the second wheeled unit is a bogie unit.
Preferably, at least one of the front and rear couplings is connected by a pivot to the plant frame and is pivotable between an extended position for connection with the corresponding tractor or bogie coupling and a retracted position. This has the advantage that when the plant is not connected to the tractor unit and bogie unit the front and rear couplings can be pivoted to the retracted position so reducing the length of the screening plant so improving its manoeuvrability.
The plant may be a crusher or shredder, a screening device or a combination of a crusher/shredder and a screening device, and may further include a discharge conveyor.
In a further aspect of the invention there is provided a transport device comprising
a tractor unit comprising a tractor coupling;
a bogie unit comprising a bogie coupling; and,
a material processing unit comprising
a plant frame;
a front coupling and a rear coupling provided at the front and rear of the plant frame respectively;
the front and rear couplings being arranged such that when the front coupling is connected to the tractor coupling and when the rear coupling is connected to the bogie coupling, the plant is suspended between the tractor unit and the bogie unit; and,
a lifting means connected to the plant frame adapted to lift the plant for connecting the tractor coupling to the front coupling and the bogie coupling to the rear coupling.
The transport device of the present invention has the advantage that it is of a reduced height compared to e.g. a screening plant and low loader.
In a further aspect of the invention there is provided a method of assembly of a transport device, the transport device comprising
a tractor unit comprising a tractor coupling;
a bogie unit comprising a bogie coupling; and,
a material processing unit comprising
a plant frame;
a front coupling and a rear coupling provided at the front and rear or the plant frame respectively;
the front and real couplings being arranged such that when the front coupling is connected so the tractor coupling and when the rear coupling is connected to one bogie coupling, the plant is
suspended between the tractor unit and the bogie unit; and,
a lifting means connected to the plant frame adapted to lift the plant for connecting the tractor coupling to the front coupling and the bogie coupling to the rear coupling,
comprising the steps of
extending the lifting means to lift the plant frame from the ground;
interengaging the tractor coupling with the front coupling and the bogie coupling and the rear coupling; and,
retracting the lifting means so suspending the plant between the tractor unit and bogie unit.
Preferably, the front end of the plant frame is lifted and the front coupling connected to the tractor coupling before the rear end of the frame is lifted and the rear coupling connected to the bogie coupling. This has the advantage that as only one end of the plant is raised from the ground at a time the screening plant is always stable.
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Merchant & Gould P.C.
Valenza Joseph E.
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