Tennis racket frame

Details Tennis racket frame Tennis racket frame

1995-04-17

1996-04-16

Stoll, William E.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273 73G, 273 73J, A63B 4910

Patent

active

055074863

ABSTRACT:
A tennis racket frame, made of fiber-reinforced resin, in which the volume percentage of aromatic polyamide fiber and/or all-aromatic polyester fiber of all fiber-reinforcing materials of a throat section, a flake section, and a handle section is 40 or more and smaller than 80, respectively. The sectional configuration of the flake section and that of the handle section are set so that the geometrical moment of inertia of the handle section is greater than that of the flake section.

REFERENCES:
patent: 4221382 (1980-09-01), Cooper et al.
patent: 4291876 (1981-09-01), Hasegawa
patent: 4309473 (1982-01-01), Minamisawa et al.
patent: 4324400 (1982-04-01), Tse
patent: 4399992 (1983-08-01), Molitor
patent: 4429873 (1984-02-01), Van Raemdonck
patent: 4684131 (1987-08-01), Mortvedt
patent: 4747598 (1988-05-01), Curtis
patent: 4891175 (1990-01-01), Haines
patent: 5083780 (1992-01-01), Walton et al.
patent: 5088735 (1992-02-01), Shigetoh
"Ceramic Racket", Popular Science, Jun., 1986 p. 56.
"Handle With KEVLAR Aids Racket Control", The Sporting Goods Dealer, May, 1981, p. 110.

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