Golf swing training club

Abstract

A golf swing training club comprising: (a) a shaft; (b) a golf head attached to a first, lower end of the shaft; and (c) a handgrip attached to a second, upper end of the shaft; wherein a standard longitudinal shaft bending angle (β) of the shaft is within a range of 45° to 90°; and wherein a mechanical beam portion of the golf swing training club is characterized by a standard extensive shear modulus of at most 15°.

What is claimed is: 
     
         1 . A golf swing training club comprising:
 (a) a shaft;   (b) a golf head attached to a first, lower end of said shaft; and   (c) a handgrip attached to a second, upper end of said shaft;   wherein a portion of said shaft that is disposed between the handgrip and the golf head includes a braided layer;   wherein a standard longitudinal shaft bending angle (β) of said shaft is within a range of 45° to 90°;   wherein a mechanical beam portion of the golf swing training club, having a length of at least 18 inches, is characterized by a standard extensive shear modulus of at most 15°;   and wherein said braided layer has a lazy tongs structure.   
     
     
         2 . The golf swing training club of  claim 1 , wherein said standard longitudinal shaft bending angle (β) of said shaft is at least 60°. 
     
     
         3 . The golf swing training club of  claim 1 , wherein said standard longitudinal shaft bending angle (β) of said shaft is within a range of 55° to 90°. 
     
     
         4 . The golf swing training club of  claim 1 , wherein said standard longitudinal shaft bending angle (β) of said shaft is within a range of 60° to 89°. 
     
     
         5 . The golf swing training club of  claim 1 , wherein said braided layer includes a braided layer of metal. 
     
     
         6 . The golf swing training club of  claim 4 , wherein said braided layer is a braided layer of metal. 
     
     
         7 . The golf swing training club of  claim 1 , wherein disposed within said braided layer is a tube having a flexural modulus of at most 0.05 GPa. 
     
     
         8 . The golf swing training club of  claim 1 , wherein disposed within said braided layer is a tube having a flexural modulus of at most 0.01 GPa. 
     
     
         9 . The golf swing training club of  claim 1 , wherein said golf head is a putting head. 
     
     
         10 . The golf swing training club of  claim 1 , wherein said golf head is a driving head. 
     
     
         11 . The golf swing training club of  claim 1 , wherein said golf head is an iron. 
     
     
         12 . The golf swing training club of  claim 1 , wherein said standard extensive shear modulus is within a range of 2° to 15°. 
     
     
         13 . The golf swing training club of  claim 1 , wherein said standard extensive shear modulus is within a range of 3° to 12°. 
     
     
         14 . The golf swing training club of  claim 12 , wherein disposed within said braided layer is a tube having a flexural modulus of at most 0.01 GPa. 
     
     
         15 . The golf swing training club of  claim 1 , wherein said standard extensive shear modulus is within a range of 2° to 15°, and wherein said standard longitudinal shaft bending angle (β) of said shaft is within a range of 60° to 89°. 
     
     
         16 . A golf swing training club comprising:
 (a) a shaft;   (b) a golf head attached to a first, lower end of said shaft; and   (c) a handgrip attached to a second, upper end of said shaft;   wherein a portion of said shaft that is disposed between the handgrip and the golf head includes a braided layer;   wherein a standard longitudinal shaft bending angle (β) of said shaft is within a range of 45° to 90°;   and wherein a mechanical beam portion of the golf swing training club, having a length of at least 18 inches, is characterized by a standard extensive shear modulus of at most 15°.   
     
     
         17 . The golf swing training club of  claim 16 , wherein said braided layer is a braided layer of metal. 
     
     
         18 . The golf swing training club of  claim 16 , wherein disposed within said braided layer is a tube. 
     
     
         19 . The golf swing training club of  claim 16 , wherein said standard extensive shear modulus is within a range of 2° to 15°. 
     
     
         20 . The golf swing training club of  claim 19 , wherein said standard longitudinal shaft bending angle (β) of said shaft is within a range of 60° to 89°.