Tennis racket with longitudinal strings different in tensile for

Details Tennis racket with longitudinal strings different in tensile for Tennis racket with longitudinal strings different in tensile for

1994-03-08

1995-10-31

Chiu, Raleigh W.

Amusement devices: games

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

Target

A63B 4902

Patent

active

054622743

ABSTRACT:
A tennis racket has longitudinal strings stretched in a longitudinal direction between a frame top and a grid end and transversal strings stretched in a transversal direction perpendicular to the longitudinal direction, and a ratio of a tensile force exerted on each longitudinal string to a tensile force exerted on each transversal string ranges from 2.5:1 to 4.0:1 so that a nodal line for vibrations in the secondary mode passes through a sweet area, thereby decreasing a reaction from the tennis racket at an impact against a tennis ball.

REFERENCES:
patent: 3999756 (1976-12-01), Head
patent: 4437662 (1984-03-01), Soong
patent: 4725059 (1988-02-01), Du Gardin et al.
patent: 4736949 (1988-04-01), Muroi
patent: 4768786 (1988-09-01), Kuebler
patent: 5211691 (1993-05-01), Sol
patent: 5310179 (1994-05-01), Takatsuka

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