| US 7,488,261 B2 | ||
| Golf club with high moment of inertia | ||
| Matthew T. Cackett, San Diego, Calif. (US); Alan Hocknell, Carlsbad, Calif. (US); Daniel M. Stevens, San Diego, Calif. (US); and Luke R. Williams, Carlsbad, Calif. (US) | ||
| Assigned to Callaway Golf Company, Carlsbad, Calif. (US) | ||
| Filed on Oct. 04, 2007, as Appl. No. 11/867,603. | ||
| Application 11/867603 is a continuation of application No. 11/458985, filed on Jul. 20, 2006. | ||
| Application 11/458985 is a continuation in part of application No. 11/161199, filed on Jul. 26, 2005, granted, now 7,166,038. | ||
| Claims priority of provisional application 60/641283, filed on Jan. 03, 2005. | ||
| Prior Publication US 2008/0020857 A1, Jan. 24, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. A63B 53/14 (2006.01); A63B 53/04 (2006.01) | ||
| U.S. Cl. 473—300 [473/329; 473/345; 473/349] | 14 Claims |
| 1. A golf club comprising:
a golf club head having a volume ranging from 400 cubic centimeters to 470 cubic centimeters, a mass ranging from 210 grams
to 250 grams, and a moment of inertia about the Izz axis through the center of gravity of the golf club head ranging from
4700 grams-centimeters squared to 6000 grams-centimeters squared;
a shaft connected to a heel end of the golf club head, the shaft having a mass ranging from 50 grams to 90 grams; and
a grip disposed on a butt end of the shaft, the grip having a mass ranging from 30 grams to 50 grams;
wherein an inertia ratio of the moment of inertia about the Izz axis of the golf club head divided by the moment of inertia
about the Iyy axis of the golf club is greater than 0.0019.
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