Games using tangible projectile – Player held and powered – nonmechanical projector – per se,... – Racket or paddle; accessory therefor
Patent
1999-05-25
2000-11-07
Chiu, Raleigh W.
Games using tangible projectile
Player held and powered, nonmechanical projector, per se,...
Racket or paddle; accessory therefor
A63B 4902
Patent
active
061428930
ABSTRACT:
An improved sports racket design which makes the velocity and angle of the hit ball more nearly independent of the point of impact of the ball on the string bed than in the prior art. There are seven structural elements included. Each of which contribute independently toward this goal. String tension of the lateral and longitudinal strings are each approximately proportional to the mean lateral and longitudinal string lengths. The outermost longitudinal and lateral strings are spaced apart from the racket rails by at least 4 cm. and 5 cm. respectively. The throat piece, if it exists, weighs less than 28 grams. The string bed is asymmetrically extended toward a handgrip which is less than 40% of the racket length. The racket rail is made rigid in the long direction and more flexible in the plane of the string bed by a high ratio of rail height to rail thickness.
REFERENCES:
patent: 4165071 (1979-08-01), Frolow
patent: 4196901 (1980-04-01), Durbin
patent: 4333650 (1982-06-01), Soong
patent: 4437662 (1984-03-01), Soong
patent: 5310179 (1994-05-01), Takatsuka
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