Dual Rotor Ride-on Surface Polisher

Abstract

A dedicated concrete surface polisher comprises a frame and powered chassis substantially resembling a twin rotor riding trowel, equipped with a plurality of diamond polishing pucks, and mounting apparatus for maintaining flat puck contact with the lower concrete surface. Each rotor supports an intermediate drive plate driven by a hydraulic motor. The intermediate drive plate comprises a circular ring plate that is reinforced by a substantially rigid, winged drive collar. Each drive plate supports a plurality of radially spaced apart polishing rotors that project into contact with the concrete surface being treated. Each polishing rotor is secured to the ring plate. The polishing rotors support a plurality of radially spaced apart, downwardly projecting, diamond-equipped pucks that frictionally bear against the concrete surface for polishing and abrading in response to rotor rotation.

Having thus described my invention, I claim: 
     
         1 . A self-propelled polisher for treating concrete surfaces, the polisher comprising:
 a chassis adapted to be propelled over a concrete surface;   at least one downwardly projecting, rotatable rotor;   a motor for actuating the rotor;   the rotor comprising an intermediate drive plate;   the intermediate drive plate comprising a ringed base plate and a winged drive collar for reinforcing the winged base plate;   a plurality of planetary abrasion rotors supported by said intermediate drive plate that contact and finish the concrete surface.   
     
     
         2 . The polisher as defined in  claim 1  wherein the ringed base plate comprises an inner, circular orifice, a ring portion concentric with said inner, circular orifice, and a plurality of integral, radially, spaced-apart spokes facilitating flexure. 
     
     
         3 . The polisher as defined in  claim 2  further comprising a plurality of voids bordered by said spokes and said ring portion. 
     
     
         4 . The polisher as defined in  claim 3  wherein said drive collar is flushly secured to said drive plate. 
     
     
         5 . A self-propelled dedicated polisher for treating concrete surfaces, the polisher comprising:
 a chassis adapted to be propelled over a concrete surface;   at least one downwardly projecting, rotatable rotor;   a motor for actuating the rotor;   the rotor comprising a generally circular intermediate drive plate;   the intermediate drive plate comprising a circular base plate with a peripheral ring and a flushly mounted winged drive collar for reinforcing the base plate;   the base plate plate comprising a peripheral ring and a plurality of spokes;   the drive collar comprising a plurality of arms overlying the spokes in assembly;   a plurality of planetary abrasion rotors supported by said intermediate drive plate that contact and finish the concrete surface, said abrasion rotors supporting puck rotors for contacting and finishing concrete.