Golf club shaft

Details Golf club shaft Golf club shaft

1997-06-20

2000-05-02

Chapman, Jeanette

Games using tangible projectile

Golf

Club or club support

473323, 273DIG23, 273DIG7, A63B 5310

Patent

active

060566485

ABSTRACT:
The present invention relates to a golf club shaft which is easy to be gripped, and superior in strength and balance in its shaft portion. A golf club shaft is constituted by fiber-reinforced prepreg formed from reinforcing fibers impregnated with synthetic resin. A small-diameter portion is provided on a head side, a large-diameter portion is provided on a grip side, and a tapered portion is provided between the small-diameter portion and the large-diameter portion. An outer diameter of the small-diameter portion at its rear end portion is made smaller by 2 mm or more than an outer diameter of the large-diameter portion at its front end portion, and bending rigidity at the rear end portion is made to be 60 to 100% of that at the front end portion.

REFERENCES:
patent: 3519270 (1970-07-01), Baymiller
patent: 4563007 (1986-01-01), Bayliss
patent: 5265872 (1993-11-01), Tennent
patent: 5421573 (1995-06-01), Kawamatsu
patent: 5620380 (1997-04-01), Tennent
patent: 5681226 (1997-10-01), Chambers
patent: 5685783 (1997-11-01), Akatsuka
"Power-Kick Shaft" advertisement on p. 43 in Golf Digest, Mar. 1978.

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