Cutting tool assembly having attached spray nozzle housing

Abstract

A cutting tool assembly ( 10 ) includes a support block ( 12 ) and a replaceable spray nozzle housing that can be manually installed onto a support block positioned on a drum in the field. Wherein the support block includes a fluid passage communicating water from a water supply to a fluid passage within the spray nozzle housing. The spray nozzle housing is connected to the support block by welding. The weld joint between the spray nozzle housing and support block forms a liquid tight seal. The spray nozzle housing is oriented on the support block so that water spray from the spray nozzle outlet is directed toward the tip of the cutting tool.

1 . A cutting tool assembly comprising: 
 a support block to be secured to a moving element of a mining machine, comprising:    a protection sleeve fixed into said support block;    a replaceable spray nozzle housing welded onto said support block;    a block fluid passage located in said support block wherein said replaceable nozzle housing is in fluid communication with said block fluid passage.    
   
   
       2 . The cutting tool assembly according to  claim 1 , wherein said block fluid passage has an upstream portion and downstream portion.  
   
   
       3 . The cutting tool assembly according to  claim 1 , wherein the support block has a first outer surface and a second outer surface and the block passage communicates fluid between said first outer surface and said second outer surface.  
   
   
       4 . The cutting tool assembly according to  claim 3 , wherein said replaceable nozzle housing is fixed to said first outer surface.  
   
   
       5 . The cutting tool assembly according to  claim 2 , wherein said upstream portion and said downstream portion are substantially straight so as to permit a drill to be inserted into said first fluid passage for cleaning.  
   
   
       6 . The cutting tool assembly according to  claim 1 , further comprising: 
 a cutting tool,    said cutting tool extends through said protective sleeve.    
   
   
       7 . A block for a cutting tool assembly, said block comprising: 
 a support block to be secured to a moving element of a mining machine; and    a spray nozzle housing,    wherein said spray nozzle housing is welded to said support block.    
   
   
       8 . The cutting tool assembly according to  claim 7 , wherein the support block has a first outer surface and a second outer surface, wherein a block fluid passage communicates fluid between an inlet in a first outer surface and an outlet in a second outer surface.  
   
   
       9 . The cutting tool assembly according to  claim 8 , wherein said block fluid passage has an upstream portion and downstream portion.  
   
   
       10 . The cutting tool assembly according to  claim 9 , wherein said upstream portion and said downstream portion are substantially straight so as to permit a drill to be inserted into said block fluid passage for cleaning.  
   
   
       11 . The cutting tool assembly according to  claim 8 , wherein said spray housing nozzle includes a fluid passage open end in communication with the support block fluid outlet.  
   
   
       12 . The cutting tool assembly according  claim 11  wherein said open end has a cross-sectional area at least twice as great as the cross-sectional area of the block outlet.  
   
   
       13 . The cutting tool assembly according to  claim 7  wherein said spray nozzle housing has a bottom surface that cooperates together with a fist outer surface of the support block to form contact surfaces.  
   
   
       14 . A method of making a cutting bit support block having a spray nozzle comprising the steps of: 
 providing a cutter bit support block with a block fluid passage having an outlet opening wherein the support block is either cast or cold-formed from a heat treatable weldable steel;    providing a spray nozzle housing with a fluid passage having an open end;    connecting the spray nozzle housing to the support block.    
   
   
       15 . The method of  claim 14  wherein the support block has a block fluid passage with an inlet for connection to a water supply and a support block outlet at the opposite end of said block fluid passage; said spray nozzle housing having a recess chamber; 
 wherein said connecting includes aligning an open end of said recess chamber with said support block outlet.    
   
   
       16 . The method of  claim 14  wherein said connecting comprises welding said spray housing nozzle to said support block.  
   
   
       17 . A generally cylindrical spray nozzle housing comprising: 
 a generally circular forward face having an outlet; and    a bottom surface,    wherein said bottom surface has an elongated recess chamber.    
   
   
       18 . The generally cylindrical spray nozzle housing according to  claim 17  wherein said bottom surface is generally flat.  
   
   
       19 . The generally cylindrical spray nozzle housing according to  claim 17 , wherein said generally cylindrical spray nozzle has a central longitudinal axis, said generally flat bottom surface is oriented at an angle between from 2° to about 20°.