Shock and vibration absorber for racquets and method for its use

Details Shock and vibration absorber for racquets and method for its use Shock and vibration absorber for racquets and method for its use

1986-04-21

1988-03-22

Schneider, Matthew L.

Amusement devices: games

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

Target

273DIG8, A63B 4900

Patent

active

047323833

ABSTRACT:
Shock and vibration is suppressed in a racquet having a tubular frame of metal, graphite, fiberglass, or the like, by a bar or column of shock-and-vibration-absorbing material such as foam. The bar is 5 inches to 10 inches in length and is weaved over and under the vertical strings in the region, between the handle and the nearest cross or horizontal string, where a ball or shuttlecock would not impact in normal play. The ends of the bar are brought through the end spaces between the string and the frame of the racquet and tucked under the frame. The bar is composed of layers of the shock-and-frequency absorbing material. The material is soft, light and resilient. The inner layer or layers has a higher density than the outer layer. The frequency for which the maximum absorption occurs decreases progressively from the inner layer or layers outwardly. The resonant frequency of a typical racquet is about 650 hertz. The predominant absorption frequency of the outer layers of the bar is between 500 and 2000 hertz. The inner layer of layers, being of higher density, have maximum absorption at higher frequency and predominantly absorb shock while the outer layers predominantly absorb vibration.

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