Golf club shaft

Details Golf club shaft Golf club shaft

1996-03-28

1997-11-11

Passaniti, Sebastiano

Games using tangible projectile

Golf

Club or club support

473323, 273DIG7, 273DIG23, A63B 5310

Patent

active

056857837

ABSTRACT:
A golf club shaft is formed of a fiber-reinforced plastic is disclosed which has a constant inside diameter of at least 7 mm between the tip end and a point G1 and a varying inside diameter increasing from the point G1 to a point G2, wherein G1 and G2 are located at positions spaced apart from the tip end distances equal to 20-50% and 70-100% of the length of the shaft, respectively. The shaft has a constant outer diameter of at least 8 mm between the tip end and a point H1 which is spaced apart from the tip end a distance equal to 20-170 mm, a varying outer diameter decreasing from H1 a point F1 which is spaced apart from the tip end a distance equal to 10-45% of the shaft, a constant diameter from F1 to a point F2 which is spaced apart from F1 a distance equal to 0-300 mm and a varying outer diameter increasing from F2 to a point H2 which is spaced apart from the grip end a distance equal to 0-300 mm.

REFERENCES:
patent: 3998458 (1976-12-01), Inoue et al.
patent: 4000896 (1977-01-01), Lauraitis
patent: 4132579 (1979-01-01), Van Auken
patent: 4135035 (1979-01-01), Branen et al.
patent: 4157181 (1979-06-01), Cecka
patent: 4757997 (1988-07-01), Roy et al.
patent: 5018735 (1991-05-01), Meredith et al.
patent: 5251896 (1993-10-01), Gerlach
patent: 5265872 (1993-11-01), Tennent et al.
patent: 5551691 (1996-09-01), Harada

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