Golf club shaft

Abstract

A golf club shaft having adjustability features, made as a composite device whose shaft members are connected by their adjacent faces having a tapered nature by which a wedging action is achieved by their assembly. The adjustability is particularly advantageous in the market situation by which the golf clubs are conventionally sold by the manufacturer for intended modification or custom-fitting by the person or business which tailors the club's shaft to the precise needs of the golfing customer. The easy assembly achieves a firm and positive holding together the shaft members, achieving desired variations in the club characteristics of length, weight and swing-effect, etc.

1 . A composite golf club shaft of circular cross-section, comprising, in combination: 
 an inner shaft and an outer shaft,    the inner shaft having at one end a taper, and having at its other end an enlarged portion, the enlarged portion having at its outer end a taper, the two tapers providing ease of insertion of the inner shaft into the outer shaft optionally at either end.    
     
     
         2 . A composite golf club shaft of circular cross-section, comprising, in combination: 
 an inner shaft and an outer shaft;    the inner shaft having at one end an enlarged portion;    the enlarged portion of the inner shaft providing a blocking abutment limiting the depth to which the inner shaft may be positioned when the inner shaft is assembled coaxially into the outer shaft, the blocking abutment also providing a centering effect of the relative colinearity of the inner shaft and outer shaft when they are assembled.    
     
     
         3 . The invention as set forth in  claim 2 , in a combination in which the inner shaft has a taper on one end and a taper on the other end.  
     
     
         4 . A composite golf club shaft of circular cross-section, comprising in combination: 
 an inner shaft and an outer shaft;    the outer shaft having a first portion and a second portion, the first portion of the outer shaft being of a relatively small inside diameter such that the inner shaft will slide within the outer shaft when the inner shaft is coaxially assembled into the outer shaft;    the outer shaft having a second portion-with an inside diameter such that it slidably receives the enlarged portion of the inner shaft when the two shafts are assembled in a colinear arrangement.    
     
     
         5 . The invention as set forth in  claim 4 , in a combination in which the second portion of the outer shaft is provided with a taper at its end adjacent the first portion of the outer shaft, the taper providing the enlargement between the outer shaft at the first portion and the second portion of the outer shaft; and also providing a centering effect for colinearity of the inner shaft and outer shaft when assembled.  
     
     
         6 . A composite golf club shaft of circular cross-section, comprising, in combination: 
 an inner shaft and an outer shaft;    the inner shaft having a first portion and a second portion, the first portion of the inner shaft being of a relatively small outside diameter such that the inner shaft will slide within the outer shaft when the inner shaft is being coaxially assembled into the outer shaft.    
     
     
         7 . The invention as set forth in  claim 6 , in a combination in which the body portion of the inner shaft is provided with a taper at its end adjacent the first portion of the inner shaft, the taper providing the enlargement between the inner shaft tip portion and the body portion of the outer shaft.  
     
     
         8 . The invention as set forth in  claim 2 , in combination in which the assembly of the two shafts is made more certain of long time usability by a bonding substance whether or not the bonding substance is of a specialized nature.  
     
     
         9 . A composite golf club shaft of circular cross-section, comprising, in combination: 
 an inner shaft and an outer shaft,    the inner shaft being adapted to be cut at the the user's option to any selected length.    
     
     
         10 . The invention as set forth in  claim 9 , in which the end of the inner shaft is of sufficient flexible nature as to be satisfactorily bendable to about  50  to accommodate variations or irregularities in what has been provided to be the reception hole in the associated club head or hosel.  
     
     
         11 . A composite golf club shaft of circular cross-section, comprising, in combination: 
 an inner shaft and an outer shaft,    connection means being provided which provide for the user the options of variations in overall club length, variations in overall weight distribution, variations in “flex (flexure) point”, and one or more other characteristics referred to as “kick point”, “balance point”, toward the goal of accuracy in use of an associated ball of ball-flight characteristics such as “launch angle”, “ball spin rate”, etc.