Abstract: A shaft for a golf club having a total length and a total weight. The shaft includes first and second tubular portions. The first and second tubular portions are formed of first and second materials, respectively. The second tubular portion has a proximal end and a tip end. The tip end has an outside diameter of less than 0.400 inches. The distal end of the first tubular portion is co-cured to the proximal end of the second tubular portion. The shaft has a resistance to twisting about a longitudinal axis of the shaft, when tested under a torsional stability test and measured at an approximate midpoint of the total length of the shaft, of less than 2.0 degrees in a torsional stability test. The shaft when measured from the tip end of the shaft in a balance point test device has a balance point of less than 46 percent.
Type:
Grant
Filed:
June 15, 2009
Date of Patent:
April 17, 2012
Assignee:
Wilson Sporting Goods Co.
Inventors:
Richard P. Hulock, Jon C. Pergande, Robert T. Thurman