Golf club shafts

A - Human Necessities – 63 – B

Patent

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Details

A63B 53/12 (2006.01) B21C 37/16 (2006.01) B21C 37/18 (2006.01) B21C 37/20 (2006.01) B21K 17/00 (2006.01)

Patent

CA 2243953

A tubular blank (10) for producing golf club shafts comprises a butt section (12) having a uniform cross-sectional configuration along its length, a tip section (14) also having a uniform cross-sectional configuration along its length, and a tapered section (16) interconnecting the butt and tip sections. Metallurgically formed rifling (18) on the interior surface of the blank extends throughout the entirety of the butt, tip and tapered sections. The golf club shafts produced from these blanks have increased strength and stiffness which is a direct result of the interior rifling. A set of golf club shafts is produced from a group of these tubular blanks with each blank of the group having the same length and the same natural frequency. Predetermined portions are then selectively removed from the tip and butt sections.

Une ébauche tubulaire (10) pour la production de shafts de clubs de golf comprend une partie manche (12) ayant une section transversale uniforme sur sa longueur, une partie pointe (14) ayant également une section transversale homogène sur sa longueur et une section conique (16) reliant la partie manche à la partie pointe. Une rainure (18) formée par métallurgie sur la surface intérieure de l'ébauche s'étend sur l'intégralité des sections manche, pointe et conique. Les shafts de clubs de golf produits à partir de ces ébauches présentent un résistance et une rigidité accrues grâce à cette rainure intérieure. On produit un ensemble de shafts de clubs de golf à partir d'un groupe desdites ébauches tubulaires, chaque ébauche du groupe ayant la même longueur et la même fréquence naturelle. Des parties prédéterminées sont ensuite enlevées sélectivement des parties pointes et manches.

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