GOLF CLUB SHAFT

PROBLEM TO BE SOLVED: To provide a lightweight golf club shaft having high operativity and excellent strength.SOLUTION: The shaft 6 has a plurality of layers a1 to a10. The layers include a bias layer in which an absolute angle θa of a fiber to a shaft axis line is 10° or greater and 70° or less, an...

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Bibliographic Details
Main Author NAKANO TAKATSUGU
Format Patent
LanguageEnglish
Published 13.12.2012
Subjects
AMUSEMENTS
APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING,CLIMBING, OR FENCING
BALL GAMES
GAMES
HUMAN NECESSITIES
SPORTS
TRAINING EQUIPMENT
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Summary:PROBLEM TO BE SOLVED: To provide a lightweight golf club shaft having high operativity and excellent strength.SOLUTION: The shaft 6 has a plurality of layers a1 to a10. The layers include a bias layer in which an absolute angle θa of a fiber to a shaft axis line is 10° or greater and 70° or less, and a hoop layer in which the angle θa is equal to or greater than 80°. The layers include a full length layer disposed all over in an axis direction of the shaft, and a partial layer partially disposed in the axis direction of the shaft. The partial layer includes back end reinforcing bias layers a4 and a6, and a backend reinforcing hoop layer a5. In the shaft 6, a torsional rigidity value GIt at a point separated by 300 mm from a butt end is 3.5X10(kgfmm/deg) or greater and 5.0X10(kgfmm/deg) or less.
Bibliography:Application Number: JP20110121471