Tennis racket

Details Tennis racket Tennis racket

1990-09-05

1993-07-13

Grieb, William H.

Amusement devices: games

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

Target

7337903, A63B 4908

Patent

active

052266508

ABSTRACT:
A tennis racket with a handle (4), preferably wrapped with a grip strip (3), which improves training of gripping techniques through the use of a sensor (6) that is incorporated into the handle (4), by which it is possible to measure the gripping force with which the hand of a tennis player wielding the tennis racket grips handle (4). Sensor (6) is connected to an electronic evaluation circuit (7) which is integrated into the handle, so that an indicator signal, especially an acoustic indicator signal, is caused to be emitted by the evaluation circuit (7) when a determined preadjustable limiting value or different limiting values of the gripping force is reached.

REFERENCES:
patent: 3111322 (1963-11-01), English
patent: 3323367 (1967-06-01), Searle
patent: 3918721 (1975-11-01), Trask
patent: 3995492 (1976-12-01), Chynes
patent: 4027879 (1977-06-01), Wright
patent: 4138118 (1979-02-01), Budney
patent: 4729560 (1988-03-01), Cho
patent: 4749183 (1988-01-01), Cho
patent: 4834376 (1989-05-01), Steinberg
patent: 4930785 (1990-06-01), Mills
patent: 4971320 (1990-11-01), Nesbit

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