A golf club head comprising a body and a hollow stiffening structure is disclosed herein. The body comprises a face section, a sole section, and a crown section, and defines a hollow interior. The hollow stiffening structure extends within the hollow interior from the crown section to the sole section to reduce stresses placed on the face section during impact with a golf ball. The hollow stiffening structure creates stiffness in a vertical, crown-sole direction of the body, while reducing stiffness in the horizontal, front-rear direction. These two effects combine to increase ball speed and improve other performance metrics from low center through high center ball impact locations, and simultaneously lower CT of the golf club.

Examples of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a body portion of a golf club head may include a cavity having an opening and an interior structure defined by a wall portion and a base portion. A hosel portion may include an insert portion and a neck portion extending therefrom. The hosel portion may be attached to the body portion by an interference fit between the neck portion and the opening of the cavity. The insert portion may be received inside the cavity and may be spaced apart from the interior structure of the cavity. A space between the insert portion and the interior structure of the cavity may be partially or entirely filled with an adhesive to hold the hosel portion in place. Other examples may be described and claimed.

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA), all combined with a high MOI about the X and Y-axis (MOI-X and MOI-Y) and maintaining a consistently and relatively low CG location measured along a direction tangent to the hosel axis along the X-Y plane (CG-B).

Examples of golf clubs and methods to manufacture golf clubs are generally described herein. In one example, a golf club may include a golf club head having a body portion and a center of gravity. A center portion of the body portion may extend from a front portion of the body portion to the rear portion of the body portion. A recess portion may be defined by the center portion. A hosel portion may extend upward from the recess portion. The hosel portion may be positioned at the center of gravity of the body portion. A shaft may be coupled to the hosel portion and extend from the hosel portion. The shaft may have a center axis that passes through the center of gravity of the golf club head. Other examples of golf club heads and methods to manufacture the same may be described and claimed.

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA), all combined with a high MOI about the X and Y-axis (MOI-X and MOI-Y) and maintaining a consistently and relatively low CG location measured along a direction tangent to the hosel axis along the X-Y plane (CG-B). The golf club head includes a frontal portion and a rear portion which may be secured together with rotational motion.

A golf club head comprising a ribbed region on at least one of a heel portion, a toe portion, sole, or crown. The ribbed region comprises a ribbed wall with an interior surface facing an interior of the golf club head, and a ribbed wall exterior facing an exterior of the golf club head. The ribbed region further comprises at least one rib protruding from the ribbed region. The first rib comprises a first rib length measured along a rib centerline of the first rib, a first rib interior section located at the ribbed wall interior surface, and a first rib exterior section located at the ribbed wall exterior surface.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head includes a top portion having a heel-side portion, a toe-side portion, and a raised central top portion with an opening. A shoulder portion extends inward toward the opening and a crown portion is attached to the shoulder portion and covers the opening. The bottom portion includes a central protrusion between a heel-side dividing plane and a toe-side dividing plane, a toe-side protrusion between the toe-side dividing plane and a toe-side bounding plane, and a heel-side protrusion between the heel-side dividing plane and a heel-side bounding plane. A distance between the toe-side dividing plane and the heel-side dividing plane is about equal to a diameter of a golf ball. Other examples and embodiments may be described and claimed.

An aerodynamic golf club head having body attributes that impart beneficial aerodynamic properties.

A head for a ball striking device includes a bracing member connected to an upper sole surface located on the sole of the body opposite the bottom sole surface. The bracing member includes a first end connected to a first point on the upper sole surface, a second end connected to a second point on the upper sole surface spaced from the first point, and a bridge portion extending between the first and second ends. The bridge portion extends upward from the upper sole surface and is spaced from the upper sole surface. The bridge portion may be formed by one or more trusses, and may define a generally triangular shape in one embodiment. The first and second ends may be connected to the upper sole surface using a variety of techniques, e.g., welding or other integral joining technique, integral forming, adhesive or other bonding material, or other technique.

A golf club with a multi-material face is disclosed herein. More specifically, the golf club head in accordance with the present invention has a multi-material striking face portion that can be comprised out of a metallic outer layer combined with a composite mid-section, all forming a face cup construction that can be connected to an aft body. The composite portion of the multi-material face disclosed in accordance with the present invention may generally have an inter laminar shear strength of greater than about 60 MPa, most preferably greater than about 60 MPa and less than about 145 MPa.