CPC A63B 53/02 (2013.01) [A63B 53/04 (2013.01); A63B 53/0466 (2013.01); A63B 53/06 (2013.01); A63B 60/52 (2015.10); A63B 53/023 (2020.08); A63B 53/045 (2020.08); A63B 53/0408 (2020.08); A63B 53/0412 (2020.08); A63B 53/0433 (2020.08); A63B 2053/0491 (2013.01); A63B 2209/00 (2013.01); A63B 2225/01 (2013.01)] | 33 Claims |
15. A golf club, comprising:
a club head defining an interior cavity, a sole defining a bottom portion of the club head, a crown defining a top portion of the club head, a face defining a forward portion of the club head and including a striking face having a striking surface width (Wss), and a hosel defining a hosel bore defining a hosel axis;
a golf club shaft having a lower end portion;
an adjustable head-shaft connection assembly coupled to the hosel;
a recessed adjustment port in the sole configured to receive a fastener configured to permit adjusting the head-shaft connection assembly;
a slot positioned in the sole of the club head adjacent the face, and extending into an interior cavity of the club head,
the slot having a slot width defined as the distance between a forward edge of the slot and a rearward edge of the slot, and
the slot having a slot length along its heel-to-toe orientation, the slot length defined as the distance between a toeward edge of the slot and a heelward edge of the slot; and
at least one weight configured to attach to the club head below the top portion;
wherein:
a portion of the sole is located between the face and the forward edge of the slot; and
the club head is formed of a first material having a first density and the at least one weight is formed of a second material having a second density, and the second density is greater than the first density;
the at least one weight is positioned at least partially within the slot;
a rearward edge of the weight is spaced from the rearward edge of the slot and a forward edge of the weight is spaced apart from the forward edge of the slot;
the club head has a balance point located on the striking face and the balance point is no more than 3 mm above a geometric center of the striking face;
a mass of the club head is between about 185 grams and about 245 grams;
a maximum dimension from the forward portion to a rear portion opposite the forward portion is greater than about 75 mm;
the club head has an above ground center-of-gravity location Zup measured in mm;
the striking face including the geometric center defining an origin of a coordinate system when the club head is at a normal address position, the coordinate system including:
an x-axis being tangent to the striking face at the origin and parallel to a ground plane, wherein the x-axis extends in a positive direction from the origin to a heel portion of the club head,
a y-axis intersecting the origin being parallel to the ground plane and orthogonal to the x-axis, wherein the y-axis extends in a positive direction from the origin to the rear portion of the club head, and
a z-axis intersecting the origin being orthogonal to both the x-axis and the y-axis, wherein the z-axis extends in a positive direction from the origin to the top portion of the club head, wherein:
the heel portion extends towards, and includes, the recessed adjustment port from a y-z plane passing through the origin, and
a toe portion is defined as the portion of a club head extending from the y-z plane in a direction opposite the heel portion;
the club head has a moment of inertia about a center-of-gravity z-axis Izz measured in kg-mm2;
the club head has a moment of inertia about a center-of-gravity x-axis Ixx measured in kg-mm2;
Izz and Ixx are related to the above ground center-of-gravity location Zup by the equation:
Ixx+Izz>20.Zup+165; and
the club head has a coefficient of restitution (COR) of no less than 0.80 as measured at the balance point on the striking face, and a characteristic time measured at the geometric center of the face of no less than 218 microseconds.
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