Tennis racket

Details Tennis racket Tennis racket

2006-11-21

2006-11-21

Chiu, Raleigh (Department: 3711)

Games using tangible projectile

Player held and powered, nonmechanical projector, per se,...

Racket or paddle; accessory therefor

C473S535000

Reexamination Certificate

active

07137912

ABSTRACT:
In a tennis racket having a racket frame composed of a fiber reinforced resin, the moment of inertia Ic of the tennis racket in a center direction thereof is set to not less than 13000 g·cm2nor more than 17000 g·cm2, the moment of inertia Ig around a center of gravity thereof is set to not less than 80000 g·cm2nor more than 200000 g·cm2, and the moments of inertia Ic and Ig are so set as to satisfy a relationship expressed by [30×(Ic)−(Ig)]/10000≧31.

REFERENCES:
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patent: 6623383 (2003-09-01), Matsuoka et al.
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patent: 10-328333 (1998-12-01), None
patent: 2001-145711 (2001-05-01), None
patent: 2002-113131 (2002-04-01), None
patent: 2003-175134 (2003-06-01), None

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