Cylindrical abrasive for floor finishing machine

Abstract

A drive plate for a concrete or stone grinding/polishing machine includes one or more abrasive elements in the form of short steel cylinders having diamond crystals captured in a hard and durable brazing alloy. Due to the round profile of the abrasive elements, as the drive plate is rotated by a drive motor, the abrasive elements are able to more readily strip mastic, sealers, glue, or most any thin film topical coating present on concrete or other hard floors.

What is claimed is: 
     
         1 . In a motorized floor finishing machine having at least one circular plate having a central hub projecting out from a first major surface of the circular plate and adapted to be attached to a motor driven drive shaft, the improvement comprising: an abrasive member attached to a second major surface of the circular plate, said abrasive member being a metal bar of a predetermined length and having a generally circular cross-section over a predetermined arc with diamond particles brazed on an exterior surface thereof and arranged such that when the abrasive member is attached to the circular plate, a longitudinal axis of the abrasive member is parallel to the plane of the circular plate. 
     
     
         2 . The floor finishing machine of  claim 1  and further including a mounting bracket for attaching the abrasive member to the circular plate. 
     
     
         3 . The floor finishing machine of  claim 2  wherein the abrasive member includes a planar surface with at least two threaded bores extending inward from the flat surface and is secured to the mounting bracket by bolts extending through apertures in the mounting bracket and into the threaded bores. 
     
     
         4 . The floor finishing machine of  claim 1  wherein the diamond particles have a grit in a range of from 16 to 400. 
     
     
         5 . The floor finishing machine of  claim 1  wherein the metal bar has a length in the range of from 0.5 inch (1.27 cm) to 4.0 inch (10.16 cm) and a diameter of 0.5 inch (1.27 cm) to 1.75 inch (4.45 cm).