Disc brush

Abstract

A disc brush has a disc having a face including at least a first portion and a second portion. A plurality of abrasive filaments are fixed to the first portion and extend generally perpendicularly from the disc. The abrasive filaments are arranged around the second portion. The second portion is recessed from the first portion to form a recess having a diameter and axial depth sufficient to receive at least a portion of a raised portion of a work piece. In one preferred embodiment, the disc brush is provided with an arbor hole to allow the disc brush to be driven by a rotary drive device and is sized to fit within a well portion of an automobile wheel to allow the disc brush to be rotatably driven to de-burr an interior portion of the wheel.

1 . A disc brush comprising: 
 a disc having a face including at least a first portion and a second portion; and    a plurality of abrasive filaments fixed to the first portion and extending generally perpendicularly from the disc and arranged around the second portion,    the second portion being recessed from the first portion to form a recess having a diameter and axial depth sufficient to receive at least a part of a raised portion of a work piece.    
   
   
       2 . The disc brush of  claim 1 , wherein the recess is concentric with a remainder of the disk.  
   
   
       3 . The disc brush of  claim 1 , wherein the abrasive filaments comprise a polymeric material impregnated with an abrasive grit.  
   
   
       4 . The disc brush of  claim 1 , wherein the abrasive filaments are grouped in bundles.  
   
   
       5 . The disc brush of  claim 1 , wherein the work piece is an automobile wheel and the disc is sized to fit within an interior well of the wheel and the recess is sized to receive a raised surface of a central portion of a hub of the wheel.  
   
   
       6 . The disc brush of  claim 5 , wherein the recess diameter is in the range of 7.5 to 8.5 inches.  
   
   
       7 . The disc brush of  claim 5 , wherein the recess axial depth is in the range of 0.25 to 2.0 inches.  
   
   
       8 . The disc brush of  claim 1 , wherein the disc is fabricated from a polymeric material.  
   
   
       9 . The disc brush of  claim 8 , wherein the polymeric material is polypropylene.  
   
   
       10 . The disc brush of  claim 1  further comprising means to couple the disc to a rotary drive device.  
   
   
       11 . The disc brush of  claim 10 , the disc further including a second face having an opening extending at least partially through the disc and forming an arbor hole, wherein the means to couple the disc to the rotary drive device includes the arbor hole.  
   
   
       12 . The disc brush of  claim 11 , wherein the arbor hole has a diameter in the range of 5.8 to 6.0 inches.  
   
   
       13 . The disc brush of  claim 1 , wherein the disc comprises a first member and a second member rigidly connected to the first member.  
   
   
       14 . The disc brush of  claim 13  wherein the second member has an opening extending at least partially therethrough to form the recess.  
   
   
       15 . The disc brush of  claim 13  wherein the first member has an opening extending at least partially therethrough to form an arbor hole and a second member having a second opening extending at least partially therethrough to form the recess.