Device and method for extraction of dust from a grinder

Abstract

A plug for a grinding machine includes one or more holes extending through to the plug for use as dust collection ports. A grinding machine includes a housing, a drive mechanism including a shaft extending through the housing, a shroud surrounding the shaft and abutting the housing to form a plenum, a head connected to the drive mechanism, at least one grinding plug having a working surface mounted in the head, and at least one channel extending from a position adjacent the working surface into the plenum.

1 . A machine for treating surfaces, comprising: 
 at least one grinding plug having a working surface; and    a channel formed in the plug for the collection of loose material generated by the grinding process.    
   
   
       2 . The machine for treating surfaces of  claim 1 , wherein at least a portion of the channel is located on an axis of the grinding plug.  
   
   
       3 . The machine for treating surfaces of  claim 1 , further comprising a second channel and wherein the channels extend through the working surface at a uniform radial distance from an axis of the plug.  
   
   
       4 . The machine for treating surfaces of  claim 1 , wherein the grinding plug comprises a diamond abrasive.  
   
   
       5 . The machine for treating surfaces of  claim 1 , wherein the outer surface of the grinding plug tapers from the end with the working surface to the end opposite the working surface.  
   
   
       6 . The machine for treating surfaces of  claim 1 , wherein the working surface is at least partially convex.  
   
   
       7 . The machine for treating surfaces of  claim 1 , further comprising a plenum formed in the end of the plug opposite the working surface.  
   
   
       8 . The machine for treating surfaces of  claim 1 , further comprising a shroud surrounding and adjacent to the grinding plug.  
   
   
       9 . A machine for treating surfaces, comprising: 
 a housing;    a drive mechanism, including a shaft extending through the housing;    a shroud connected to the shaft and abutting the housing to form a plenum;    a head connected to the shaft;    at least one grinding plug having a working surface mounted in the head; and    a channel extending from a location adjacent the working surface into the plenum.    
   
   
       10 . The machine for treating surfaces of  claim 9 , wherein at least a portion of the channel is located on an axis of the grinding plug.  
   
   
       11 . The machine for treating surfaces of  claim 9 , further comprising a second channel extending from the working surface into the plenum and wherein the channels extend through the working surface at a uniform radial distance from an axis of the plug.  
   
   
       12 . The machine for treating surfaces of  claim 9 , wherein the grinding plug comprises a diamond abrasive.  
   
   
       13 . The machine for treating surfaces of  claim 9 , wherein the outer surface of the grinding plug tapers from the end with the working surface to the end opposite the working surface.  
   
   
       14 . The machine for treating surfaces of  claim 9 , wherein the working surface is at least partially convex.  
   
   
       15  The machine for treating surfaces of  claim 9 , further comprising a plenum formed in the end of the plug opposite the working surface.  
   
   
       16 . The machine for treating surfaces of  claim 9 , further comprising a shroud surrounding and adjacent to the grinding plug.  
   
   
       17 . A grinding plug comprising: 
 a working surface; and    a channel extending through to the working surface.    
   
   
       18 . The grinding plug  claim 17 , wherein at least a portion of the channel is located on an axis of the grinding plug.  
   
   
       19 . The grinding plug of  claim 17 , further comprising a second channel and wherein the channels extend through the working surface at a uniform radial distance from an axis of the plug.  
   
   
       20 . The grinding plug of  claim 17 , wherein the working surface is formed of a diamond abrasive.  
   
   
       21 . The grinding plug of  claim 17 , wherein the outer surface of the grinding plug tapers from the end with the working surface to the end opposite the working surface.  
   
   
       22 . The grinding plug of  claim 17 , wherein the working surface is at least partially convex.