Method of making golf club shafts
AssigneeCon-Sole Golf Corporation
InventorJoseph M. Braly
Life of this patent
Estimating the term…
Abstract
Method of producing variety of golf club shafts from universal blank shaft of given length includes steps of determining actual natural frequency of blank shaft. Selected amounts of shaft length are then removed from both tip and butt end portions of blank in correlation with natural frequency of blank. Total amount removed from blank solely depends upon length of shaft desired while selected amounts removed from tip and butt end portions of blank solely depend upon natural frequency of shaft desired. As proportional amount removed from tip portion increases, frequency of produced shaft also increases. Conversely, as proportional amount removed from tip portion decreases, frequency of produced shaft also decreases.
Claims7
A method of producing a golf club shaft of predetermined natural frequency and length from an oversized universal blank shaft of given length having tip and butt end portions and a natural frequency within a given range, the method including the steps of measuring the actual natural frequency of the blank shaft, determining relative amounts of material to be removed from the tip and butt end portions of the blank shaft to obtain the desired length and natural frequency of the shaft being produced, removing the relative amounts of shaft material so determined from both the tip and butt end portions of blank shaft, the total amount of material removed from the blank solely depending upon the length of the shaft desired, and the relative amounts removed from the tip and butt end portions of the blank solely depending upon the natural frequency of the shaft desired.
Dependencies are inferred from the claim text.