Racket frame

Details Racket frame Racket frame

2006-07-11

2006-07-11

Chiu, Raleigh W. (Department: 3711)

Games using tangible projectile

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

Racket or paddle; accessory therefor

C473S535000

Reexamination Certificate

active

07074142

ABSTRACT:
A tennis racket frame (10), including a sleeve composed of a fiber reinforced resin, having a weight not less than 180 g nor more than 270 g, when strings are not mounted in a ball-hitting face thereof surrounded with a head part thereof. Supposing that the strings are not mounted in the ball-hitting face, a secondary natural frequency (F1) of the racket frame in an in-plane direction thereof is set to not less than 200 Hz nor more than 320 Hz, a secondary natural frequency (F2) thereof in an out-of-plane direction thereof is set to not less than 480 Hz nor more than 650 Hz, and F1/F2is set to not less than 0.3 nor more than 0.6.

REFERENCES:
patent: 5082266 (1992-01-01), Lo
patent: 5893810 (1999-04-01), Umlauft
patent: 6159114 (2000-12-01), DeGaris
patent: 6293878 (2001-09-01), Iwatsubo et al.
patent: 6447412 (2002-09-01), Filippini
patent: 6688997 (2004-02-01), Ashino et al.
patent: 2005/0043124 (2005-02-01), Takeuchi et al.
patent: 2991129 (1999-10-01), None
patent: 2000-61004 (2000-02-01), None
patent: P2001-61994 (2001-03-01), None
patent: 3090850 (2002-10-01), None
patent: 2003-38683 (2003-02-01), None

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