Golf Club

Abstract

A golf club is provided having a hollow shaft, a grip at one end of the shaft, and a hollow club head providing a striking face at an opposite end of the shaft. A hermetically-sealed, hollow, vacuum chamber in which air and other gases have been evacuated and in which an amount of a fluent weight medium is contained is provided within the golf club and extends continuously within the shaft and club head, such that, during a backswing of the golf club, the fluent weight medium is displaceable from a distal end of the vacuum chamber within the club head to a proximal end of the vacuum chamber within the shaft and during a downswing of the golf club, the fluent weight medium is displaceable from the proximal end of the vacuum chamber within the shaft to the distal end of the vacuum chamber within the club head.

1 . A golf club, comprising:
 a hollow shaft, a grip at one end of said shaft, and a hollow club head providing a striking face at an opposite end of said shaft;   a hermetically-sealed, hollow, vacuum chamber in which air and other gases have been evacuated and in which an amount of a fluent weight medium is contained is defined within said shaft and club head such that, during a golf swing, said fluent weight medium is displaceable along a length of said vacuum chamber from a proximal end of said vacuum chamber within said shaft to a distal end of said vacuum chamber within said club head.   
     
     
         2 . The golf club according to  claim 1 , wherein said fluent weight medium is a liquid. 
     
     
         3 . The golf club according to  claim 1 , wherein said fluent weight medium is liquid mercury. 
     
     
         4 . The golf club according to  claim 1 , wherein said fluent weight medium is 2 to 3 ounces of liquid mercury. 
     
     
         5 . The golf club according to  claim 1 , wherein a ratio of a weight of said amount of said fluent weight medium within said vacuum chamber to a weight of said hollow club head is within a range of 1:3 to 1:1. 
     
     
         6 . The golf club according to  claim 1 , wherein a ratio of a weight of said amount of said fluent weight medium within said vacuum chamber to a weight of said hollow club head is within a range of 2:3 to 1:1. 
     
     
         7 . The golf club according to  claim 5 , wherein the entire amount of said fluent weight medium within said vacuum chamber is displaceable entirely within said club head. 
     
     
         8 . The golf club according to  claim 1 , wherein said distal end of said vacuum chamber is formed by a close-ended conduit extending within said hollow club head directly behind said striking face of said club head such that said fluent weight medium is displaceable only within said conduit within said hollow club head and is restricted from being displaceable within a remaining hollow section of the club head. 
     
     
         9 . The golf club according to  claim 8 , wherein said conduit is welded to a rear side of said striking face. 
     
     
         10 . The golf club according to  claim 8 , wherein said conduit extends at a mid-height of said striking face. 
     
     
         11 . The golf club according to  claim 10 , wherein said vacuum chamber extending within said shaft has a constant pre-determined inner diameter along a full length thereof and wherein said conduit within said club head has a constant inner diameter along a full length thereof such that the inner diameter of said conduit is substantially the same size as or slightly greater than said pre-determined inner diameter of said vacuum chamber extending within said shaft. 
     
     
         12 . The golf club according to  claim 1 , wherein said vacuum chamber extends at least half the full length of said shaft. 
     
     
         13 . The golf club according to  claim 1 , wherein said vacuum chamber extends to a portion of said shaft within twelve inches of said grip. 
     
     
         14 . The golf club according to  claim 1 , wherein said vacuum chamber extends to a portion of said shaft adjacent said grip. 
     
     
         15 . The golf club according to  claim 1 , wherein said vacuum chamber is lined with an anti-friction lining.