CPC A63B 53/0466 (2013.01) [A63B 53/04 (2013.01); A63B 53/047 (2013.01); A63B 60/00 (2015.10); A63B 53/0408 (2020.08); A63B 53/0412 (2020.08); A63B 53/0433 (2020.08); A63B 53/0437 (2020.08); A63B 53/0458 (2020.08)] | 20 Claims |
1. A multi-material iron-type golf club head comprising:
(i) a shell having a face positioned at a front portion where the golf club head impacts a golf ball, the face being opposite a rear portion and extending between a top portion and a sole, thereby defining a closed internal volume, wherein the golf club head includes at least two different materials including a first material and a second material, wherein the second material accounts for at least 80 grams;
(ii) the face has a face thickness that varies from a minimum face thickness to a maximum face thickness, a maximum characteristic time of at least 220 microseconds, and an engineered impact point, a face height, a top edge height, and a lower edge height, wherein the face has a blade length measured horizontally from an origin point toward a toe side of the golf club head to the most distant point on the golf club head in this direction, wherein the blade length includes a toe blade length section and a heel blade length section measured in the same direction as the blade length from the origin point to the engineered impact point;
(iii) a bore having a center that defines a shaft axis which intersects with a horizontal ground plane to define the origin point, wherein the bore is located at a heel side of the golf club head, and wherein the toe side of the golf club head is located opposite of the heel side; and
(iv) a center of gravity located:
(a) vertically from the origin point a distance Ycg, wherein a ratio of the Ycg distance to the top edge height is less than 0.40;
(b) horizontally from the origin point toward the toe side of the golf club head a distance Xcg; and
(c) a distance Zcg from the origin point toward the rear portion in a direction generally orthogonal to the vertical direction used to measure Ycg and generally orthogonal to the horizontal direction used to measure Xcg;
(d) a club moment arm from the center of gravity to the engineered impact point is less than 1.1″, wherein a ratio of the club moment arm to the heel blade length section is less than 0.9; and
(e) a transfer distance measured horizontally from the center of gravity to a vertical line extending from the origin point, wherein the transfer distance is at least 10% greater than the club moment arm, and a ratio of the club moment arm to the transfer distance is less than 0.75;
(v) wherein the engineered impact point is located:
(a) vertically toward the top portion from the origin point a distance Yeip, wherein 0.5″>(Yeip−Ycg)>−0.5″;
(b) horizontally from the origin point toward the toe side a distance Xeip that is generally parallel to the face and the ground plane, wherein 0.5″>(Xeip−Xcg)>−0.5″; and
(c) a distance Zeip from the origin point toward the face in a direction generally orthogonal to the vertical direction used to measure Ycg and generally orthogonal to the horizontal direction used to measure Xcg, wherein (Zeip+Zcg)<2.0″.
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