Racket, and more particularly a tennis racket

Details Racket, and more particularly a tennis racket Racket, and more particularly a tennis racket

1989-05-26

1990-12-11

Shapiro, Paul E.

Amusement devices: games

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

Target

273 73J, 273 73G, A63B 5112

Patent

active

049764330

ABSTRACT:
According to an illustrative example of this invention, a gas spring is incorporated into a tennis racket. This gas spring is connected with some of the strings such as to maintain a predetermined tension within the strings irrespective of possible elongation of the strings during operation.

REFERENCES:
patent: 4613138 (1986-09-01), Haythornthwaite
patent: 4690405 (1987-09-01), Frolow
patent: 4765621 (1988-08-01), Game
patent: 4783072 (1988-11-01), Haar

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