Adjustable stiffness golf club shaft

Details Adjustable stiffness golf club shaft Adjustable stiffness golf club shaft

1998-03-11

1999-08-03

Wong, Steven

Games using tangible projectile

Golf

Club or club support

473323, 473409, A63B 5310

Patent

active

059317442

ABSTRACT:
A stepped golf club shaft with cylindrical segments joined by conical bands. The shaft is a composite with longitudinal and helical reinforcing fibers. The majority of the longitudinal fibers are located within the inner half of the shaft sidewall thickness, and the helical fibers are located within the outer half. A cutting tool is inserted into the bore of the hollow shaft and severs some of the longitudinal fibers to reduce the shaft stiffness, and therefore the natural frequency of oscillation, of the shaft.

REFERENCES:
patent: 3646610 (1972-02-01), Jackson
patent: 3963236 (1976-06-01), Mann
patent: 4000896 (1977-01-01), Lauraitis
patent: 4122593 (1978-10-01), Braly
patent: 5119602 (1992-06-01), Shemesh
patent: 5814268 (1998-09-01), Banchelin

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