Drafted tool bit and blade assembly

Abstract

A material penetrating tool includes a shaft portion defining a central axis, and an enlarged cutting portion extending downwardly axially from the shaft portion. The enlarged cutting portion includes a rearward blunt surface, a front cutting surface, a first side surface and a second side surface, and the first side surface and the second side surface define an angle of extension measured in a plane perpendicular to the central axis, forming a wider forward cutting surface than the rearward blunt surface in a plane perpendicular to the central axis.

1 - 16 . (canceled) 
     
     
         17 . A tile configured to be attached to a notch of a tool bit for use with a grading machine, the tile comprising:
 a first side surface;   a second side surface;   a top surface;   a bottom surface;   a rear surface; and   a front faceted portion including a first facet, and a second facet forming an obtuse included angle with the first facet on the top surface ranging from 120 to 180 degrees,   wherein the front faceted portion includes a perimeter that is defined by the first side surface, the second side surface, the top surface, and the bottom surface.   
     
     
         18 . The tile of  claim 17 , wherein the first side surface is perpendicular to the rear surface and the top surface and is parallel to the second side surface and further comprises a blend transitioning from the first facet to the second facet. 
     
     
         19 . The tile of  claim 18 , wherein the bottom surface forms right angles with the rear surface, the first side surface, and the second side surface, and wherein the tile further comprises a beveled surface connecting the first facet, the second facet, the blend, and the bottom surface. 
     
     
         20 . The tile of  claim 18 , wherein the bottom surface forms a bottom obtuse angle with the rear surface, wherein the bottom surface includes a third facet and a fourth facet that form a bottom included angle with each other, and wherein the bottom included angle matching matches the obtuse included angle. 
     
     
         21 . The tile of  claim 17 , further comprising a blend transitioning from the first facet to the second facet. 
     
     
         22 . The tile of  claim 21 , wherein the blend connects to the top surface and the bottom surface. 
     
     
         23 . The tile of  claim 17 , further comprising a chamfered surface connecting the first facet, the second facet, and the bottom surface. 
     
     
         24 . The tile of  claim 23 , wherein the chamfered surface forms a chamfer angle with the bottom surface ranging from 120 to 180 degrees. 
     
     
         25 . The tile of  claim 17 , wherein the first side surface and the second side surface are parallel. 
     
     
         26 . The tile of  claim 25 , wherein the top surface and the bottom surface are parallel. 
     
     
         27 . An insert configured to be attached to a tool bit for use with a grading machine, the insert comprising:
 a top surface;   a bottom surface; and   a front faceted portion including a first facet, a second facet forming an obtuse included angle with the first facet on the top surface, and a blend transitioning from the first facet to the second facet.   
     
     
         28 . The insert of  claim 27 , wherein the blend connects the top surface and the bottom surface. 
     
     
         29 . The insert of  claim 27 , further comprising a chamfered surface connecting the first facet, the second facet, the bottom surface, and the blend. 
     
     
         30 . The insert of  claim 29 , wherein the chamfered surface forms a chamfer angle with the bottom surface ranging from 120 to 180 degrees. 
     
     
         31 . The insert of  claim 30 , wherein the obtuse included angle ranges from 120 to 180 degrees. 
     
     
         32 . An insert configured to be attached to a tool bit for use with a grading machine, the insert comprising:
 a top surface;   a bottom surface; and   a front faceted portion including:
 a first facet; 
 a second facet forming a first obtuse included angle with the first facet on the top surface; 
 a third facet forming an external obtuse angle with the second facet on the top surface; and 
 a fourth facet forming a second obtuse included angle with the third facet on the top surface. 
   
     
     
         33 . The insert of  claim 32 , wherein the first obtuse included angle and the second obtuse included angle range from 120 to 180 degrees. 
     
     
         34 . The insert of  claim 32 , further comprising a first blend transitioning from the first facet to the second facet and a second blend transitioning from the third facet to the fourth facet. 
     
     
         35 . The insert of  claim 32 , further comprising:
 a first chamfered surface connecting the first facet, the second facet, and the bottom surface; and   a second chamfered surface connecting the third facet, the fourth facet, and the bottom surface.   
     
     
         36 . The insert of  claim 35 , wherein the first chamfered surface and the second chamfered surface form a chamfer angle with the bottom surface ranging from 120 to 180 degrees.