Patent Publication Number: US-2009221219-A1

Title: Surface Truss Planer

Description:
RELATED U.S. APPLICATIONS 
     This application claims the benefit of Provisional Application 61/032,411, filed Feb. 28, 2008, entitled “Truss Grinder System”. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to the field of floor levelness and floor flatness ensurance. More particularly, the invention relates to surface grinding and planing devices to increase surface flatness. 
     BACKGROUND 
     The present invention provides a distinct advance in the state of the art by grinding a concrete floor, rail, plinth, sleeper, and the like to exact tolerances as described by the data output of profiling devices that may or may not be with the prior art. 
     This invention employs a wheeled truss and this truss is used not only as the main guide which the invention uses to stabilize its precision grinding heads, but also to house the components that control the unit. These components consist of a variety of electric, hydraulic, manual, electromechanical, hydro, and internal combustion devices all of which can be configured together to unite a self-sustained unit for the purpose of correcting elevation tolerances on specific concrete surfaces. 
     In an alternate embodiment, the present invention can also be fitted with accelerometers and inclinometers to produce surface profiles of what the device ‘sees’ as it travels down a path and it can produce a profile indicative of the finished ground surface. 
     SUMMARY OF THE INVENTION 
     The present invention solves the prior art problems discussed above and provides a distinct advance in the state of the art. This device can rest upon a concrete rail or surface and grind the high crests down thereby shallowing the troughs of the surfaces sinusoidal chords as represented by 
         y ( t )= A ·sin( w t+q ) 
     which describes a wavelike function of time (t) with: 
     1) peak deviation from center=A (amplitude), 
     2) angular frequency w, 
     3) phase q. 
     This wave pattern occurs often in nature, including ocean waves, sound waves, light waves and wet concrete when in the liquid stage before hardening. Concrete finishing devices cause a rhythmic patter and unwanted waves are the result. Also, a rough sinusoidal pattern can be seen when emulating the path of a vehicle such as a car, bus, or truck, and other vehicles. When these wave patterns occur in concrete, they must often be repaired and that is the job of this invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a side view of the truss planer 
         FIG. 2  is a top view of the truss planer 
         FIG. 3  is a rear view of the truss planer 
     
    
    
     DETAILED DESCRIPTION 
     A preferred embodiment of the surface truss planer apparatus of the present invention, referred to as a truss planer, is displayed in  FIG. 1 through 3 . The truss planer is comprised of articulating wheels  101  supporting a truss frame  103  on which rests a plenum plate  104 . The cutting motor  109  is suspended from the truss frame  103  and the shaft of the drive motor is connected to the cutting heads  102 . The shaft of the cutting motor  109  passes through the plenum plate  104 , which possesses bearings for the cutting motor  109  shaft. The plenum plate  104  also provides up and down positioning of the cutting heads  102  using the control arms  105 . 
     The adjustment wheel  106  is mounted on a fixed bearing that when turned, adjusts a precision-threaded shaft that pushes or pulls the control arms  105 , raising or lowering the plenum plate  104 . The control unit  107  is where the components that run the truss planer&#39;s systems reside. It specifically controls the process of rotating the cutting discs and using the drive train. The drive train  108  is connected to one of the articulating wheels and propels the truss planer under the control of the control unit  107 . There is a water tank  110  on board the truss planer to cool the cutting blades 
     The articulating wheels  101  at the four corners of the truss frame  103  act as an averaging filter of the bumps on the surface on which they ride; the surface can be any surface including rails. If rails or similar reference form are used, the articulating wheels  101  can be adjusted a pre-determined amount to affect the reshaping of the surface being planed. 
     The cutting heads  102  can be adjusted and positioned anywhere from left to right, or fore and aft by means of the control arms  105  and the adjustment wheel  106 . With the truss frame  103 , the distance between front and rear axles can be varied by changing the truss length by means of the adjustment wheel  106  operating on the attached precision-threaded shaft to plane a surface, referencing the contour waves of the surface to change the surface profile. The cutting head  102  can be positioned anywhere to create a change in the resulting surface profile. 
     Although the invention has been described and a preferred embodiment has been provided, equivalent features may be employed and substitutions made within this specification without departing from the scope of the invention as recited in the claims.