Racket having thickened shaft portion

Details Racket having thickened shaft portion Racket having thickened shaft portion

1985-02-04

1987-05-12

Pinkham, Richard C.

Amusement devices: games

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

Target

273 73G, A63B 4902

Patent

active

046643800

ABSTRACT:
A racket for playing a game using a ball of limited resiliency such as a tennis racket comprises a racket head frame portion provided with stringing, a handle, and a shaft arrangement connecting the racket head frame portion and the handle. The resonance frequency of the racket head frame portion at least approximately corresponds to the period of time for which a ball is in contact with the strings of the racket when struck thereby, and the natural frequency of the racket substantially corresponds to the excitation frequency of the ball. The thickness of the racket frame as measured in a direction normal to the plane of the stringing is greater than the thickness of the handle as measured in a corresponding direction.

REFERENCES:
patent: D233355 (1974-10-01), Foley
patent: D243467 (1977-02-01), Kouvelas
patent: 2171223 (1939-08-01), Robinson
patent: 3640533 (1972-02-01), Davis et al.
patent: 3647211 (1972-03-01), Doessel et al.
patent: 3809402 (1974-05-01), Haines et al.
patent: 4291574 (1981-09-01), Frolow
patent: 4293129 (1981-10-01), Planakis
patent: 4322076 (1982-03-01), Bertram et al.
patent: 4438925 (1984-03-01), Lindstrom
patent: 4440392 (1984-04-01), Popplewell

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