Stump Destruction Apparatus

Abstract

A bit assembly comprising a main bit assembly, which further comprises one or more cutting blades, said one or more cutting blades further comprising a lower cutting blade and an upper cutting blade; a shaft comprising a lower and an upper end; a guide bit assembly, wherein the guide bit assembly is attached the lower end of the shaft.

We claim: 
     
         1 . A bit assembly comprising:
 a. one or more cutting blades, said one or more cutting blades further comprising a lower cutting blade and an upper cutting blade;   b. a shaft comprising a lower and an upper end;   c. a guide bit assembly, wherein the guide bit assembly is attached the lower end of the shaft.   
     
     
         2 . The bit assembly of  claim 1  wherein the guide bit assembly comprises a cutting element. 
     
     
         3 . The bit assembly of  claim 2  wherein the guide bit assembly comprises a plurality of cutting elements, wherein the cutting elements are distributed evenly about an outer surface of the guide bit assembly. 
     
     
         4 . The bit assembly of  claim 2  wherein the bit assembly comprises AR500 steel. 
     
     
         5 . The bit assembly of  claim 3  wherein the bit assembly comprises AR500 steel. 
     
     
         6 . The bit assembly of  claim 1 , further comprising a lateral cutting blade. 
     
     
         7 . The bit assembly of  claim 6  wherein the lateral cutting blade is attached to the distal end of the upper cutting blades relative the shaft 
     
     
         8 . The bit assembly of  claim 1  wherein the one or more cutting blades further comprise a replaceable cutting edge. 
     
     
         9 . The bit assembly of  claim 3  wherein the one or more cutting blades further comprise a replaceable cutting edge. 
     
     
         10 . An apparatus useful for removing stumps comprising a shaft comprising a first end and a second end, wherein in the first end comprises a shaft flange which is connectable to a gearbox output flange and the second end is connectable to a guide bit assembly, said guide bit assembly comprising one or more cutting blades extending therefrom. 
     
     
         11 . The apparatus of  claim 10  wherein at least one of the one or more cutting blades extend upwardly at an angle above a horizontal axis extending from an attachment point with the guide bit assembly. 
     
     
         12 . The apparatus of  claim 11  wherein the angle is about twelve (12) degrees. 
     
     
         13 . The apparatus of  claim 10  wherein the guide bit assembly further comprises a cutting element. 
     
     
         14 . The bit assembly of  claim 13  wherein the guide bit assembly comprises a plurality of cutting elements, wherein the cutting elements are distributed evenly about an outer surface of the guide bit assembly. 
     
     
         15 . The bit assembly of  claim 10  wherein the bit assembly comprises AR500 steel. 
     
     
         16 . The bit assembly of  claim 13  wherein the bit assembly comprises AR500 steel. 
     
     
         17 . A drive system comprising:
 a. a hydraulic motor, wherein said motor further comprises a torque modulation means and a first splined drive shaft;   b. a gearbox further comprising a second splined drive shaft;   c. a coupling connecting the gearbox to the motor; and   d. an internal spline coupling adapted to receive both the first splined drive shaft and the second splined drive shaft.   
     
     
         18 . The drive system of  claim 13 , wherein the torque modulation means is adapted to maintain a constant output torque of the motor. 
     
     
         19 . The drive system of  claim 12 , wherein the gearbox is a variable speed gearbox. 
     
     
         20 . The gearbox of  claim 12 , further comprising a gear ratio between 40:1 and 155:1.