Tennis racket frame

Details Tennis racket frame Tennis racket frame

1990-10-10

1992-05-19

Coven, Edward M.

Amusement devices: games

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

Target

273DIG23, 273 73R, A63B 4910

Patent

active

051141450

ABSTRACT:
The tennis racket frame according to the present invention has a total weight of 230-300 g and total length of 52-67 cm and a periodic damping ratio of 0.5-4.0%, which is constituted of a fiber reinforced resin composed of polyamide resin reinforced by a continuous fiber and/or long fiber reinforcing material. A resin layer containing a non-woven fabric may be provided at the inside, outside or/and in the middle of the fiber reinforced resin layer. Because of this structure, the tennis racket frame of the present invention can be light in weight and compact in size with a large periodic damping property, making it possible to avoid tennis elbow.

REFERENCES:
patent: 4291574 (1981-09-01), Frolow
patent: 4357013 (1982-11-01), Fernandez et al.
patent: 4506887 (1985-03-01), Trysinsky
patent: 4539253 (1985-09-01), Hirschbuehler et al.
patent: 4643857 (1987-02-01), Cousin et al.
Advertisement found in Popular Science, p. 110, Sep. 1985.

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