Floor finishing machine

Claim 1

A SURFACE GRINDING MACHINE COMPRISING A PAIR OF DRIVE MOTORS EACH HAVING A TUBULAR OUTPUT SHAFT AND CONNECTED TO HAVE THEIR RESPECTIVE SHAFTS ROTATE IN OPPOSITE DIRECTIONS, A PAIR OF CIRCULAR GRINDING MEANS, MEANS FOR FLEXIBLY COUPLING EACH OF SAID GRINDING MEANS TO THE LOWER END OF EACH MOTOR OUTPUT SHAFT COAXIALLY THEREWITH, AND MEANS FOR SUPPLYING A CUTTING LUBRICANT DOWNWARDLY UNDER PRESSURE THROUGH EACH OUTPUT SHAFT TO THE CENTER OF ITS RESPECTIVE GRINDING MEANS, EACH GRINDING MEANS INCLUDING A CIRCULAR PLATE, A PLURALITY OF SPACED ELONGATED ABRASIVE MEANS, SAID ABRASIVE MEANS BEING FIXEDLY ATTACHED TO SAID PLATE AND ORIENTED THEREON IN SUCH A MANNER WITH REGARD TO THE DIRECTION OF ROTATION OF ITS ASSOCIATED OUTPUT SHAFT THAT THE OUTWARD FLOW OF THE CENTRALLY FED CUTTING LUBRICANT IS RETARDED BY THE CENTRIPETAL PUMPING EFFECT OF SAID ABRASIVE MEANS.