Cutting and grinding wheel for a rotary tool

Abstract

A cutting and grinding wheel made of a circular disk having a center, two opposing surfaces, an outer circumference, and a center defining a bore hole. A plurality of teeth are evenly distributed around the disk's outer circumference, with each tooth having an apex and a pair of opposing sidewalls generally parallel to the disk opposing surfaces. The teeth formed in a generally sinusoidal pattern, and each adjacent pair of teeth are separated by a gullet. An abrasive coating is disposed to be concentrated upon the wheel teeth apexes and opposing teeth sidewalls.

We claim:  
     
         1 . A cutting and grinding wheel comprising: 
 a circular disk having a center, two opposing surfaces, an outer circumference, and said center defining a bore hole;    a plurality of teeth evenly distributed around said outer circumference, each of said teeth having an apex and a pair of opposing sidewalls generally parallel to said disk opposing surfaces, said teeth formed in a generally sinusoidal pattern, each adjacent pair of said teeth being separated by a gullet; and    an abrasive coating disposed to be concentrated upon said wheel teeth apexes and said opposing teeth sidewalls.    
     
     
         2 . The cutting and grinding wheel according to  claim 1 , wherein said opposing surfaces on said disk, other than said bore hole, are solid.  
     
     
         3 . The cutting and grinding wheel according to  claim 1 , wherein said plurality of teeth number  45 .  
     
     
         4 . The cutting and grinding wheel according to  claim 1 , wherein said wheel has an outer diameter measuring one inch.  
     
     
         5 . The cutting and grinding wheel according to  claim 1 , wherein said abrasive coating forms an included angle at said peripheral edge.  
     
     
         6 . The cutting and grinding wheel according to  claim 1 , wherein said pattern of said teeth and said gullets is a radiused, gear-like pattern.  
     
     
         7 . The cutting and grinding wheel according to  claim 1 , wherein said teeth sidewalls are coextensive with said disk opposing surfaces.  
     
     
         8 . The cutting and grinding wheel according to  claim 1 , wherein said disk opposing surfaces are generally planar.  
     
     
         9 . The cutting and grinding wheel according to  claim 8 , wherein said teeth sidewalls are coextensive with said disk opposing surfaces.  
     
     
         10 . The cutting and grinding wheel according to  claim 1 , wherein said abrasive coating is formed by magnetic structuring.  
     
     
         11 . The cutting and grinding wheel according to  claim 1 , wherein said abrasive coating is a tungsten-carbide grit.  
     
     
         12 . The cutting and grinding wheel according to  claim 11 , wherein said tungsten-carbide grit is approximately 100 grit.  
     
     
         13 . The cutting and grinding wheel according to  claim 1 , wherein said teeth and said grit are brazed with a eutectic brazing metal.  
     
     
         14 . The cutting and grinding wheel according to  claim 13 , wherein said brazing metal is a NiCr braze alloy.  
     
     
         15 . The cutting and grinding wheel according to  claim 1 , wherein said abrasive coating is formed of a single layer of brazed grit particles.  
     
     
         16 . The cutting and grinding wheel according to  claim 1 , wherein said disk opposing surfaces are non-planar.  
     
     
         17 . The cutting and grinding wheel according to  claim 1 , wherein said abrasive coating forms a thickness which is wider than said thickness of said disk for promoting air flow and evacuating material away from said coating.  
     
     
         18 . A cutting and grinding wheel assembly comprising: 
 a circular disk having a center, two opposing surfaces, an outer circumference, and said center defining a bore hole;    a plurality of teeth evenly distributed around said outer circumference, each of said teeth having an apex and a pair of opposing sidewalls generally parallel to said disk opposing surfaces, said teeth formed in a generally sinusoidal pattern, each adjacent pair of said teeth being separated by a gullet;    an abrasive coating disposed to be concentrated upon said wheel teeth apexes and said opposing teeth sidewalls;    a mandrel having a first and second ends, said first end for engagement in the chuck of a rotary power tool; and    wherein the wheel is secured to said second end of said mandrel by a threaded fastener passing through said bore hole and into a threaded blind-end bore located on said second end of said mandrel.    
     
     
         19 . A cutting and grinding wheel comprising: 
 a circular disk having a center, two solid and generally planar opposing surfaces, an outer circumference, and said center defining a bore hole;    a plurality of teeth evenly distributed around said outer circumference, each of said teeth having an apex and a pair of opposing sidewalls generally parallel to and coextensive with said disk opposing surfaces, said teeth formed in a generally sinusoidal radiused gear-like pattern, each adjacent pair of said teeth being separated by a gullet; and    an abrasive coating disposed to be concentrated upon said wheel teeth apexes and said opposing teeth sidewalls, said coating formed by magnetic structuring and consisting of tungsten-carbide grit particles secured to said teeth apexes and said sidewalls with a stainless eutectic NiCr braze alloy.    
     
     
         20 . A cutting and grinding wheel comprising: 
 a circular disk having a center, a thickness, two opposing surfaces, an outer circumference having a pair of opposing sidewalls, and said center defining a bore hole; and    an abrasive coating disposed to be concentrated upon said outer circumference and said sidewalls to form a thickness which is wider than said thickness of said disk for promoting air flow and evacuating material away from said coating.