Arrow Bending Axis Orientation

Abstract

In some embodiments, an arrow comprises a shaft, a nock and a structural asymmetry orienting a weak bending axis of the arrow.

1 . An arrow comprising:
 a shaft;   a nock; and   a structural asymmetry orienting a weak bending axis of the arrow.   
     
     
         2 . The arrow of  claim 1 , comprising a cross-section, a first half of the cross-section shaped differently from a second half of the cross-section. 
     
     
         3 . The arrow of  claim 2 , the first half comprising the asymmetry. 
     
     
         4 . The arrow of  claim 1 , the asymmetry extending along a length of the arrow. 
     
     
         5 . The arrow of  claim 1 , the shaft comprising the asymmetry. 
     
     
         6 . The arrow of  claim 5 , the asymmetry formed in an outer surface of the shaft. 
     
     
         7 . The arrow of  claim 5 , the shaft comprising a tube, the asymmetry formed in an inner surface of the tube. 
     
     
         8 . The arrow of  claim 5 , the shaft comprising a tube and a stiffener, the stiffener comprising the asymmetry. 
     
     
         9 . The arrow of  claim 5 , the shaft comprising a plurality of cavities aligned in a lengthwise direction of the arrow. 
     
     
         10 . The arrow of  claim 5 , the shaft comprising a groove. 
     
     
         11 . The arrow of  claim 10 , an outer surface of the shaft comprising the groove. 
     
     
         12 . The arrow of  claim 10 , an inner surface of the shaft comprising the groove. 
     
     
         13 . The arrow of  claim 5 , the asymmetry hidden in a sidewall of the shaft. 
     
     
         14 . The arrow of  claim 5 , the shaft comprising first fibers and second fibers arranged to provide the asymmetry. 
     
     
         15 . An arrow comprising:
 a shaft comprising a cavity;   a stiffener oriented in the cavity, the stiffener comprising an asymmetrical cross-sectional shape; and   a nock attached to the shaft.   
     
     
         16 . The arrow of  claim 15 , the nock attached to the stiffener. 
     
     
         17 . The arrow of  claim 16 , the nock comprising a notch comprising a notch axis, the stiffener comprising a strong bending axis, the strong bending axis oriented orthogonal to the notch axis. 
     
     
         18 . The arrow of  claim 15 , the nock comprising a recess, a portion of the stiffener oriented in the recess. 
     
     
         19 . The arrow of  claim 18 , the recess comprising a shape similar to a cross-sectional shape of the stiffener. 
     
     
         20 . The arrow of  claim 15 , the stiffener comprising a cross-member that spans a diameter of the shaft.