Disc saw felling head housing improvements

Abstract

A disc saw felling head has a replaceable lower blade housing and an optional replaceable wear liner in the housing.

1 . A disc saw felling head comprising: 
 an upper portion including a main weldment;    a disc saw blade rotatably mounted to the main weldment below the main weldment, the disc saw blade having teeth exposed at a forward cutting zone of the head;    a housing defining a space below the upper portion in which the teeth of the saw blade are at least partially contained rearward of the cutting zone of the head;    wherein the housing has a top wall that is part of the main weldment and sidewalls that are attached to the main weldment by removable fasteners.    
   
   
       2 . The improvement of  claim 1 , wherein the main weldment has a flange to which the sidewalls are fastened.  
   
   
       3 . The improvement of  claim 2 , wherein said flange is above said disc saw blade.  
   
   
       4 . The improvement of  1 , wherein a replaceable liner is provided between said sidewalls and said blade.  
   
   
       5 . The improvement of  claim 4 , wherein said liner is clamped against said upper portion of said head.  
   
   
       6 . The improvement of  claim 4 , wherein said liner is captured in a groove of said housing.  
   
   
       7 . The improvement of  claim 1 , wherein said housing includes a lower blade guard which extends radially inwardly below said teeth of said disc saw blade.  
   
   
       8 . The improvement of  claim 7  wherein said sidewalls are welded to said lower blade guard.  
   
   
       9 . The improvement of  claim 8 , wherein a replaceable liner is supported by said lower blade guard.  
   
   
       10 . The improvement of  claim 9 , wherein said liner is received in a groove of said lower blade guard.  
   
   
       11 . The improvement of  claim 10 , wherein said liner is also received in a groove of said upper portion of said head.  
   
   
       12 . The improvement of  claim 8 , wherein said liner is clamped between said lower blade guard and said upper portion of said head, radially outward of said disc saw blade.  
   
   
       13 . The improvement of  claim 12 , wherein said liner is clamped by the tightening of the fasteners which attach the sidewalls to the upper portion of the head.  
   
   
       14 . The improvement of  claim 1 , wherein skis are provided beneath said housing.  
   
   
       15 . The improvement of  claim 14 , wherein said skis are integral with said sidewalls.  
   
   
       16 . The improvement of  claim 1 , wherein said side walls are one piece.  
   
   
       17 . The improvement of  claim 1 , wherein said sidewalls are provided with at least one hole through which the degree of wear of a wear liner inside of the housing can be determined.