Semi-automatically adjustable length and torque resistant golf shaft

Abstract

An adjustable golf shaft having an upper shaft member and a lower shaft member. The upper shaft member has an elongated bore therein and the lower shaft member has a cylinder and a rod having one end fixed to a proximal end of the cylinder. A fixed bushing is positioned within the elongated bore of the upper shaft member and has an elongated bore extending therethrough. The rod is slidably mounted through the elongated bore of the bushing. The frictional force between the rod and the bushing prevents the rod from sliding relative to the bushing when the user of the golf swings the golf shaft. The shaft also includes a threaded screw, where the bushing includes a female thread to accommodate the threaded screw.

1 . An adjustable golf shaft, comprising:
 an upper shaft member having an elongated bore therein with a fixed bushing positioned within the elongated bore therein, the bushing having an elongated bore extending therethrough;   a lower shaft member having a cylinder and a rod having one end fixed to a proximal end of the cylinder; and   a threaded screw, the bushing including a female thread to accommodate the threaded screw,   wherein the rod has a sliding portion adapted to travel through the elongated bore of the bushing and hold the rod in place relative to the bushing by a frictional force between the sliding portion and the bushing and wherein an entire portion of the sliding portion has a uniform cross section along a longitudinal direction of the rod.   
     
     
         2 . An adjustable golf shaft as recited in  claim 1 , wherein a distance between the bushing and a distal end of the cylinder changes as a length of the shaft increases or decreases. 
     
     
         3 . An adjustable golf shaft as recited in  claim 1 , further comprising a putter head, wherein the putter head is attachable to a distal end of the cylinder. 
     
     
         4 . An adjustable golf shaft as recited in  claim 1 , wherein the elongated bore of the bushing is dimensioned to prevent the rod from rotating therewithin, to thereby form a torque resistant shaft.