String holes of a sports racket frame

Details String holes of a sports racket frame String holes of a sports racket frame

1992-06-10

1993-09-07

Millin, V.

Amusement devices: games

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

Target

273 73F, A63B 4902, A63B 4910

Patent

active

052421627

ABSTRACT:
A sports racket frame with improved string holes includes a predetermined number of insertion pins pre-arranged in the molding cavity. The inner wall surface of the molding cavity adjacent to each insertion pin is filled with the fiber cement made of materials identical in quality with those making up the tubular strip used to form the racket frame. The sports racket frame so attained is composed of string holes which are integrally and simultaneously made with the racket frame as a unitary body and are provided with tubular support wall extending along the circumference thereof to reinforce the structural strength of the racket frame.

REFERENCES:
patent: 4061520 (1977-12-01), Cecka et al.
patent: 4264389 (1981-04-01), Staub et al.
patent: 4340226 (1982-07-01), Haines
patent: 4357013 (1982-11-01), Fernandez
patent: 4614626 (1986-09-01), Frerking
patent: 4913434 (1990-04-01), Fischer
patent: 5143669 (1992-09-01), Mott

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