US2006223647A1PendingUtilityA1

Weight-matched set of golf clubs

45
Individually held — no corporate assignee on recordPriority: Apr 4, 2005Filed: May 24, 2005Published: Oct 5, 2006
Est. expiryApr 4, 2025(expired)· nominal 20-yr term from priority
Inventors:Alan Brooks
A63B 53/005A63B 60/002A63B 60/24A63B 60/00
45
PatentIndex Score
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Claims

Abstract

A weight matched set of golf clubs is provided, wherein each club provides the golfer with precisely the same feel when the club is swung. Weight is added to each of the golf clubs in a set whose rotational dynamic properties (e.g., moment of inertia) have been matched about a selected axis. Sufficient weight is added to each of the clubs in the set to make the total weight of that club equal to the total weight of the heaviest club in the set. Such weight is added in such manner as to leave the moment of inertia about the selected axis of each club in the set essentially unchanged. This will provide the golfer with a set of clubs whose translational inertia, as well as the previously established rotational inertia, is essentially the same for each club in the set.

Claims

exact text as granted — not AI-modified
1 . A set of golf clubs comprising 
 a first golf club having a first weight and a first moment of inertia about a first axis of the first golf club;    a second golf club having a second weight and a second moment of inertia about a second axis of the second golf club, wherein the first moment of inertia is substantially equal to the second moment of inertia, and the first weight is substantially equal to the second weight.    
   
   
       2 . The set of golf clubs of  claim 1 , wherein the first axis is located at a grip end of the first golf club and the second axis is located at a grip end of the second golf club.  
   
   
       3 . The set of golf clubs of  claim 1 , wherein the first golf club comprises a first internal weight located inside a shaft of the first golf club at the first axis.  
   
   
       4 . The set of golf clubs of  claim 3 , wherein the first internal weight comprises an external portion which extends outside of the shaft of the first golf club.  
   
   
       5 . The set of golf clubs of  claim 3 , wherein the second golf club comprises a second internal weight located inside a shaft of the second golf club at the second axis.  
   
   
       6 . The set of golf clubs of  claim 5 , wherein the first internal weight is less than the second internal weight.  
   
   
       7 . The set of golf clubs of  claim 3 , wherein the first internal weight is a cylindrical weight.  
   
   
       8 . The set of golf clubs of  claim 7 , wherein the first internal weight is metal.  
   
   
       9 . The set of golf clubs of  claim 7 , wherein the cylindrical weight has a stepped diameter.  
   
   
       10 . The set of golf clubs of  claim 1 , wherein the first golf club has a first swing weight and the second golf club has a second swing weight, wherein the first swing weight is different than the second swing weight.  
   
   
       11 . The set of golf clubs of  claim 1 , wherein the first axis is located away from a grip end of the first golf club and the second axis is located away from a grip end of the second golf club.  
   
   
       12 . The set of golf clubs of  claim 1 , wherein the first weight and the second weight vary by 10% or less.  
   
   
       13 . The set of golf clubs of  claim 12 , wherein the first weight and the second weight vary by 5% or less.  
   
   
       14 . The set of golf clubs of  claim 13 , wherein the first weight and the second weight vary by 1% or less.  
   
   
       15 . A method of fabricating a set of golf clubs comprising: 
 designing each golf club in the set of golf clubs to have substantially the same moment of inertia about a given axis; and    adding weight to one or more of the golf clubs in the set at the given axis, such that each of the golf clubs in the set has the same weight.    
   
   
       16 . The method of  claim 15 , wherein the step of adding weight comprises affixing an internal weight inside a shaft of the golf club at the given axis.  
   
   
       17 . A method of fabricating a set of golf clubs comprising: 
 designing each golf club in the set of golf clubs to have substantially the same swing weight; and    adding weight to one or more of the golf clubs in the set at an axis about which the swing weight estimates a moment of inertia, such that each of the golf clubs in the set has the same weight.    
   
   
       18 . The method of  claim 17 , wherein the step of adding weight comprises affixing an internal weight inside a shaft of the golf club at the axis.

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