CPC A63B 53/0466 (2013.01) [A63B 53/06 (2013.01); A63B 53/0408 (2020.08); A63B 53/0412 (2020.08); A63B 53/0433 (2020.08); A63B 2053/0491 (2013.01)] | 21 Claims |
1. A golf club head comprising:
a front end, a rear end, a top side, a lower side, a toe side, a heel side, a hosel positioned at the heel side and defining a hosel axis, a sole positioned at the lower side, a crown positioned at the top side, and an interior cavity, wherein the golf club head has a volume of 350 cm3 to 600 cm3; and
a face positioned at the front end of the golf club head and including a striking surface; wherein:
the striking surface has a club head origin positioned at a geometric center of the striking surface;
the club head origin defines a head origin coordinate system including:
a z-axis extending through the head origin in a generally vertical direction relative to a ground plane when the golf club head is in a normal address position, and extending in a positive direction from the club head origin towards the crown of the golf club head;
an x-axis extending through the head origin in a toe-to-heel direction generally parallel to the striking surface and generally perpendicular to the z-axis, and extending in a positive direction from the club head origin toward the heel side of the golf club head; and
a y-axis extending through the head origin in a front-to- back direction and generally perpendicular to the x-axis and to the z-axis, and extending in a positive direction from the club head origin towards the rear end of the golf club head;
a golf club head center of gravity z-axis extends generally parallel to the head origin z-axis, and a ratio of a moment of inertia about the golf club head center of gravity z-axis (Izz) to the volume of the golf club head is at least 0.86 kg/m;
a golf club head center of gravity x-axis extends generally parallel to the head origin x-axis, and a ratio of a moment of inertia about the golf club head center of gravity x-axis (Ixx) to the volume of the golf club head is at least 0.596 kg/m;
a golf club head center of gravity y-axis extends generally parallel to the head origin y-axis, and a moment of inertia about the golf club head center of gravity y-axis (lyy) is at least 258 kg-mm2;
at least 40% of the crown is made of a first fiber-reinforced polymeric material and at least 50% of the sole is made of a second fiber-reinforced polymeric material;
a moment of inertia about the hosel axis is at least 626 kg-mm2; and
Izz is at least 400 kg-mm2, Ixx is at least 270 kg-mm2.
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