CPC A63B 53/0475 (2013.01) [A63B 2053/0479 (2013.01); A63B 60/54 (2015.10); A63B 2209/00 (2013.01)] | 20 Claims |
1. A golf club head comprising:
a body portion having a volume of less than or equal to 100 cubic centimeters, the body portion comprising a first material having a first density, an interior cavity, a toe portion with a toe portion edge, a heel portion with a heel portion edge, a front opening at a front portion, a back portion having a back wall portion, and a top portion;
a reference coordinate system comprising a horizontal x-axis, a vertical y-axis orthogonal to the x-axis, and a z-axis orthogonal to both the x-axis and the y-axis;
a center of gravity located at x-coordinate location CGX, y-coordinate location CGY, and z-coordinate location CGZ;
a face portion coupled to the front portion to close the front opening, the face portion comprising at least one back groove portion;
a filler material in the interior cavity;
a coefficient of restitution of greater than or equal to 0.81;
a first mass portion coupled to the body portion, the first mass portion comprising a second material having a second density different from the first density, the first mass portion having a first mass portion center of gravity located at x-coordinate location CGM1X, y-coordinate location CGM1Y, and z-coordinate location CGM1Z; and
a second mass portion coupled to the body portion, the second mass portion comprising a third material having a third density different from the first density,
wherein the first mass portion has a first shape and the second mass portion has a second shape different from the first shape,
wherein a distance between the second mass portion and the toe portion edge is less than half a distance between the first mass portion and the toe portion edge,
wherein a distance on the x-axis between CGM1X and CGX is less than or equal to 0.1 inch,
wherein a distance on the y-axis between CGM1Y and CGY is less than or equal to 0.6 inch, and
wherein a distance on the z-axis between CGM1Z and CGZ is less than or equal to 0.4 inch.
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