Floor Grinding Machine

Abstract

The present invention is a floor grinder assembly for grinding a floor. The assembly includes first and second rails configured for being mounted spaced apart from and parallel to one another. A plurality of stands is configured for mounting the first and second rails above the floor. The stands have an adjustable length for adjusting a height position of the first and second rails such that the rails define a plane above the floor. A truss is configured to mount between the rails and to be movable along a length of the rails. A grinding assembly includes a grinding wheel and a motor driving the grinding wheel. The grinding assembly is configured for mounting to the truss and for being movable along a length of the truss.

1 . A floor grinder assembly for grinding a floor, the assembly comprising: first and second rails configured for being mounted spaced apart from and parallel to one another;
 a plurality of stands configured for mounting said first and second rails above the floor, said stands having an adjustable length for adjusting a height position of said first and second rails such that said rails define a plane above the floor;   a truss configured for mounting between said rails and for being movable along a length of said rails; and   a grinding assembly including a grinding wheel and a motor driving said grinding wheel, said grinding assembly being configured for mounting to said truss and for being movable along a length of said truss.   
     
     
         2 . The assembly according to  claim 1 , further comprising a carriage, said carriage having a housing configured for selectively mounting said grinding assembly to said truss. 
     
     
         3 . The assembly according to  claim 2 , wherein said housing has rollers configured to roll on said truss and a hinged wall to releasably attach said housing to said truss. 
     
     
         4 . The assembly according to  claim 1 , wherein said rails and said truss are formed of rail segments, said segments have locating pins and corresponding holes configured to axially mount said segments to one another. 
     
     
         5 . The assembly according to  claim 1 , wherein said truss includes sliding sleeves configured to be selectively affixed to opposite ends of said truss, said sleeves are configured to movably mount said truss to said rails. 
     
     
         6 . The assembly according to  claim 1 , wherein said stands each have:
 a harness configured for removeably mounting said stand to said rails;   a base;   a threaded piston projecting from said base and being attached to said harness; and   a threaded coupling disposed on said base for adjusting position of said threaded piston and thus said harness.   
     
     
         7 . The assembly according to  claim 2 , wherein said carriage has a pair of spaced apart legs mounted on said housing, said legs each have a respective sleeve mounted thereon opposite said housing, said grinding wheel is rotatably mounted between said sleeves. 
     
     
         8 . The assembly according to  claim 7 , wherein said legs each have a respective array of holes formed therein and said sleeves each have a respective array of holes formed therein, and pins configured to be inserted into corresponding holes to lock said sleeves with respect to said legs and establish a height of said grinding wheel with respect to the truss and the floor. 
     
     
         9 . The assembly according to  claim 8 , wherein one of said legs has a step to offset a bottom portion of said leg and allow said grinding wheel to travel beyond said rail facing said leg with said step. 
     
     
         10 . The assembly according to  claim 9 , wherein said housing has a locking device configured to lock the carriage at a fixed position on said truss. 
     
     
         11 . The assembly according to  claim 10 , wherein said grinding wheel has a protective shroud. 
     
     
         12 . The assembly according to  claim 7 , wherein said grinding wheel has an axis of rotation that is substantially parallel to said truss. 
     
     
         13 . The assembly according to  claim 7 , wherein said grinding wheel has an axis of rotation that is substantially horizontal. 
     
     
         14 . A method of grinding a floor comprising:
 installing the floor grinding machine according to  claim 1 , on a floor; and   moving the grinding wheel across the floor for making the floor flat with respect to itself.