Arrow broadhead

Abstract

An improved broadhead arrowhead is disclosed including spiral-shaped, curving or twisting, blades of increasing width along a leading edge thereof, and an insert including a bearing element which allows for broadhead rotation independent of the arrow shaft about the longitudinal axis of the arrow shaft during flight. The curved blades and bearing element of the present invention allow the broadhead to continue rotating after contacting the target.

I claim:  
     
         1 . An improved broadhead arrowhead for affixation to an arrow shaft comprising: 
 (a.) a forward portion comprising a point;    (b.) a rearward portion for engaging said arrow shaft;    (c.) a curved blade intermediate said forward and rearward portions, said curvature promoting a twisting aspect of said broadhead with regard to a direction of flight;    (d.) said blade increasing in width along a leading edge thereof.    
     
     
         2 . The broadhead of  claim 1  wherein said forward portion further comprises chisel-shaped flats.  
     
     
         3 . The broadhead of  claim 1  wherein said blade further comprises a cut-out portion.  
     
     
         4 . The broadhead of  claim 1  wherein said rearward portion further comprises a thread.  
     
     
         5 . The broadhead of  claim 1  wherein said rearward portion further comprises a journal.  
     
     
         6 . The broadhead of  claim 1  further comprising means for allowing said broadhead to rotate independently of said arrow shaft.  
     
     
         7 . The broadhead of  claim 6  wherein said means for allowing said broadhead to rotate independently of said arrow shaft comprises a bearing element.  
     
     
         8 . The broadhead of  claim 6  wherein said means for allowing said broadhead to rotate independently of said arrow shaft comprises a plurality of sleeves accommodating relative rotational motion therebetween.  
     
     
         9 . The broadhead of  claim 1  further comprising means for replacement of said blade independently from the remainder of said broadhead.  
     
     
         10 . The broadhead of  claim 9  wherein said means for replacement of said blade comprises a lug at a rearward portion of said blade and a retainer for cooperating with said lug.  
     
     
         11 . The broadhead of  claim 9  wherein said means for replacement of said blade comprises a groove for accommodating said blade.  
     
     
         12 . An improved arrow comprising: 
 (a.) a broadhead arrowhead comprising a forward portion carrying a point, a rearward portion for engaging a shaft of said arrow, and a blade intermediate said forward and rearward portions; and,    (b.) means for accommodating independent rotation of said broadhead arrowhead with regard to said arrow shaft.    
     
     
         13 . The arrow of  claim 12  wherein said blade is a curved blade, said curvature promoting a twisting aspect of said broadhead with regard to a direction of flight of said arrow.  
     
     
         14 . The arrow of  claim 12  wherein said means for accommodating independent rotation of said arrowhead comprises a bearing element.  
     
     
         15 . The arrow of  claim 12  wherein said means for accommodating independent rotation of said arrowhead comprises a plurality of sleeves allowing relative rotational motion therebetween.  
     
     
         16 . The arrow of  claim 12  wherein said blade may be separated independently from the remainder of said broadhead for replacement of either said blade or said remainder.  
     
     
         17 . An improved arrow comprising: 
 (a.) an arrowhead, said arrowhead comprising a pointed tip at a forward end thereof, and a threaded portion at a rearward end thereof; and,    (b.) an insert, said insert comprising an outer portion for engaging an inner portion of an arrow shaft, an internally threaded inner portion for engaging said arrowhead threaded portion, said insert outer and inner portions accommodating relative rotation therebetween.    
     
     
         18 . The arrow of claim wherein said arrowhead comprises a broadhead arrowhead.  
     
     
         19 . The arrow of  claim 18  wherein said broadhead comprises a curved blade of increasing width along a leading edge thereof.  
     
     
         20 . The arrow of  claim 17  wherein said insert comprises a bearing.