Road structure – process – or apparatus – Apparatus – Means to agitate material
Reexamination Certificate
1999-07-30
2001-05-22
Will, Thomas B. (Department: 3673)
Road structure, process, or apparatus
Apparatus
Means to agitate material
C404S113000
Reexamination Certificate
active
06234713
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a concrete paving machine having ganged vibrators traveling on a mounted traversing truss frame that is adjustable to be positioned forwardly of the frame of the concrete paving machine.
It has been suggested that a plurality of ganged vertical mounted vibrators may be secured to a concrete paving machine frame to engage the concrete ahead of the concrete finishing unit to vibrate the concrete prior to finishing. In such assemblies, the ganged vibrators travel back and forth across the poured concrete and engage the poured concrete. However, such assemblies are adapted to be suspended from a truss assembly rigidly mounted to the paving machine frame. Accordingly, such assemblies have not been commercially acceptable for several reasons.
First, the weight of the powered ganged vibrator carriage assembly secured to the concrete machine frame causes the concrete paving machine frame to move vertically up and down as the carriage unit with the ganged vibrators traverses back and forth across the poured concrete surface. This up and down movement of the concrete paving machine frame produces an uneven finished concrete resulting in the failure of the paving machine to maintain a proper profile for the finished concrete surface.
Secondly, the back and forth movement across the concrete surface of the heavy duty power source necessary to power the ganged vibrators enhances the vertical up and down movement of the concrete leveling machine frame. Such up and down distortion further exacerbates the improper profile of the finished concrete surface.
Thirdly, the rigid mounting of the ganged vibrator assembly to the concrete paving machine frame results in a structure that must be assembled for usage at the job site and which must be disassembled after usage for transportation to another job site. Accordingly, such assemblies have found only limited usage.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a novel concrete paving machine having a ganged vibrator assembly that traverses back and forth across a poured concrete surface without effecting the predetermined profile of the finished concrete.
A further object of the present invention is to provide a novel concrete paving machine which includes a ganged concrete vibrating apparatus mounted to a truss support assembly which may be adjustably positioned forwardly relative to the concrete paving machine frame.
Another object of the present invention is to provide a novel concrete paving machine having a ganged vibrating apparatus which moves through the concrete to be vibrated in a direction laterally of the roadway or deck on which the concrete is being leveled and finished and wherein the ganged vibrating apparatus may selectively be raised and lowered into the body of the concrete in a novel and expeditious manner.
Still a further object of the present invention is to provide a concrete paving machine having a ganged vibrator carriage assembly which moves back and forth laterally across the poured concrete without causing the frame of the concrete paving machine to deviate or distort by vertically moving up and down to thereby maintain a predetermined profile for the finished concrete surface.
Yet another object of the present invention is to provide a concrete paving machine having a ganged vertical vibrator assembly adapted to travel on a traversing frame containing the power source necessary for powering in the ganged vertical vibrator assembly back and forth across the poured concrete without distorting the desired and predetermined profile of the finished concrete that has been set by the paving machine.
Still another object of the present invention is a novel concrete paving machine which stores the vertical vibration frame and unit in a collapsed position to provide portability of the paving machine between job sites.
Yet another object of the present invention is a novel paving machine which adjustably mounts and projects a ganged vibrator assembly and traversing frame forwardly of the carriage finishing unit.
The present invention relates to a concrete paving machine having a ganged vertical vibrator assembly which is moveable on a traversing frame which is adjustably positioned forwardly of the frame of the concrete paving machine. The concrete finishing machine includes a finishing carriage unit engagable with the surface of the concrete and movable transversely across the body of the concrete. Specifically, the ganged vertical vibrator assembly includes a vibrator truss support member frame that is telescopically mounted to the frame of the concrete paving machine. The truss support member frame may be extended forwardly of the concrete paving machine when it is desired to vibrate the concrete and the truss support member frame is retractable to a position adjacent the frame of the concrete paving machine when it is necessary to transport the concrete paving machine between job sites. The ganged vibrating assembly is adapted for movement between a downwardly position wherein the ganged vibrator unit extends into and below the surface of the concrete and an upwardly position wherein the ganged vibrator unit is above the surface of the concrete.
In the present invention, the frame of the concrete paving machine is structurally arranged to accommodate the weight of the finishing carriage unit as it traverses back and forth across the deck or concrete slab to maintain a predetermined profile to the finished concrete. Thus, the distortion of the concrete paving machine frame is minimized during concrete leveling and finishing. The attachment of a ganged vibrating assembly to the concrete paving machine frame is taken into account and the paving machine is set to maintain the desired profile to the finished concrete. Accordingly, the mounting of the truss support assembly to the concrete paving frame and the mounting of the ganged vibrator assembly to the machine frame structurally maintains the predetermined grade or profile desired during the finishing operation across the entire deck or concrete surface.
Other and additional objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings which, by way of illustration, show a preferred embodiment of the present invention and the principles thereof and what is now considered to be the best mode contemplated in applying those principles. Other embodiments of the present invention employing the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the scope of the appended claims.
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Blom Frederick A.
Johnson Dean A.
Rowe Murray A.
Addie Raymond V
CMI Corporation
Emrich & -Dithmar
Will Thomas B.
LandOfFree
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