Surface Truss Planer

Abstract

An improved mechanism for grinding surfaces flat is presented, involving a precision grinder with grinding heads that are adjustable in a vertical dimension controlled by a support structure on wheels. The support structure has an adjustable wheelbase that allows sinusoidal flaws in a surface to be ground down in a controllable way. The device can be used in coordination with floor flatness measurement devices to grind concrete floors, and other horizontal surfaces.

1 . a truss planer, comprised of articulating wheels supporting a truss frame,
 the truss frame supporting a rectangular plenum plate, a cutting motor, and a drive train,   the cutting motor possessing a vertical drive shaft, the drive shaft of the cutting motor connected to cutting heads,   the drive shaft of the cutting motor passing through the plenum plate, the plenum plate possessing bearings around the drive shaft of the cutting motor,   the truss frame also possessing control arms and an adjustment shaft, the control arms connecting the truss frame to and supporting the plenum plate with a rotating means, the adjustment shaft passing horizontally through the truss frame and passing through the control arms,   the adjustment shaft turnable around its axis by means of a control wheel at one end,   the articulating wheels connected to the truss frame with an adjustable means, the adjustable means allowing movement of the articulating wheels along the long axis of the truss frame, the articulating wheels supporting the weight of the truss planer,   the drive train a motor connected to one articulating wheel in such a manner as to use the articulating wheel to propel the truss planer apparatus along a flat surface.   
   
   
       2 . A method of using the truss planer as in  claim 1 , comprised of the steps of
 adjusting the height of the cutting heads at the end of the drive shaft of the cutting motor by means of turning the control wheel,   adjusting the distance between the articulating wheels along the length of the truss frame,   lining up the truss planer to bring the cutting heads in contact with a surface to be smoothed,   starting the cutting motor and the drive train,   guiding the truss planer along the surface to be smoothed.