Abstract: Golf club heads include: (a) a club head body having a ball striking face and defining a rear cavity; (b) a fluid-filled bladder in the cavity; and (c) a retaining member holding the fluid-filled bladder in the cavity. Other club heads include: (a) a club head body having a ball striking face and defining a rear cavity; and (b) an insert member in the rear cavity, wherein the insert member interior includes one or more chambers facing the rear surface of the ball striking face. The chamber(s) may cover at least 30% of a total surface area of the interior surface of the insert member and/or at least 30% of a total interior major surface area of the rear cavity. Golf clubs including these club heads and methods of making such golf clubs and golf club heads also are described.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, a rear, and a hosel region. The heel includes an airfoil-like surface shaped like the leading edge of an airfoil that extends over a majority of the length of the heel. The back may include a Kammback feature having a concavity extending from the heel-side to the toe-side of the back. The heel-side edge of the concavity may be shaped like the leading edge of an airfoil. Further, the sole may include a diffuser that extends at an angle of from approximately 10 degrees to approximately 80 degrees from a moment-of-impact trajectory direction. A hosel fairing that extends from the hosel region toward the toe may also be provided on the crown. A golf club including the golf club head is also disclosed.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.

Abstract: A cavity back golf club head having an interchangeable bridge member is disclosed. The interchangeable bridge member extends across a rear cavity connecting a heel and a toe of the golf club head to control the trajectory of a golf ball.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: (a) a cylindrical structure having a cylindrical interior chamber for receiving a golf club shaft, a rotation-inhibiting structure, and a securing structure; and (b) a securing system for releasably engaging the securing structure. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts. Furthermore, the shaft may be bent or otherwise extend at an angle from the shaft connection assembly so as to allow adjustment of the shaft position with respect to the club head.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: (a) a shaft engaging member including a rotation-inhibiting structure; (b) a club head engaging member including a shaft-receiving chamber and a retaining structure for engaging the rotation-inhibiting structure; and (c) a securing system for releasably securing the shaft engaging member with respect to the club head engaging member. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts. Furthermore, the shaft may be bent or otherwise extend at an angle from the shaft engaging member so as to allow adjustment of the shaft position with respect to the club head.

Abstract: Golf club heads include: (a) a body having a ball-striking face and a rear face, the body defining a cavity; (b) a bridge member extending across the cavity, wherein the bridge member is provided to affect, at least in part, a position of a center of gravity of the club head; and (c) a feel altering element provided between the bridge member and the rear face. The feel altering element may affect a wide variety of parameters that relate to the “feel” of the golf club head when it strikes a golf ball, such as the sound produced by the club head during the strike, the vibrational response of the club head during the strike, the swing characteristics of the club head (e.g., weight, center of gravity position, etc.), and the like.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, a rear and a hosel region located at the intersection of the ball striking face, the heel, the crown and the sole. A plurality of dimples are located on the hosel region, on the crown, on the sole, and/or on the heel, wherein at least some of the plurality of dimples have a major axis that is not aligned in a direction parallel to the moment-of-impact club-head-trajectory direction. A golf club including the golf club head is also provided.

Abstract: Golf club heads are releasably engaged with shafts so that the club heads and shafts can be readily interchanged and/or so that the shaft position with respect to the club head can be readily changed. Assemblies for connecting the club head and shaft may include: (a) a shaft engaging member including a rotation-inhibiting structure; (b) a club head engaging member including a shaft-receiving chamber and a retaining structure for engaging the rotation-inhibiting structure; and (c) a securing system for releasably securing the shaft engaging member with respect to the club head engaging member. The club head and shaft may be changed by releasing the securing system and exchanging the original parts with different parts. Furthermore, the shaft may be bent or otherwise extend at an angle from the shaft engaging member so as to allow adjustment of the shaft position with respect to the club head.

Abstract: A golf club head system and a golf club head for inclusion into a golf club are provided. The golf club head includes a main body member and a secondary body member. The main body member has a striking surface, a sole portion, a crown portion, and a rear face substantially opposed to the striking surface. The main body member defines an at least substantially enclosed main body cavity. The secondary body member is attached to the main body member and extends at least substantially over the entire rear face of the main body member. The golf club head system includes two or more secondary body members, each configured for interchangeable attachment to a main body member. Each secondary body member defines an internal concavity, has a different external shape, and has a different combination of center-of-gravity and moment-of-inertia characteristics.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.

Abstract: Wood-type golf club heads include: (a) a club head body including heel, toe, crown, sole, and weighted rear portions; and (b) a variable thickness ball striking face. The club head body parts and weighted portion(s) may be arranged such that the club head has a moment of inertia about a vertical axis passing through the club head center of gravity of at least 5000 g-cm2. Such club heads may include: (a) a cup face member including a ball striking face portion and a return portion; (b) sole and crown portions engaged with the return portion; (c) a rear body member engaged with the crown and/or sole portions; (d) a weight member at the club head rear; and/or (e) a hosel member engaged with the cup face member, the crown portion, and/or the sole portion. Methods of making such club heads also are described.

Abstract: A golf club head includes a wood type golf club head body having a first portion that extends from the top portion to the sole portion and includes a first depth of the golf club head body, and a second portion that extends from the top portion to the sole portion having a second depth smaller than the first depth. Further, the sole or top portion of the golf club head body is configured so that it includes a sloped boundary portion that defines a transition in depth between the first portion and the second portion of the golf club head body. The first portion and second portion may be configured so that a center of gravity of the golf club head body is positioned nearer to the heel side than the toe side of the club head.

Abstract: Wood-type golf club heads include: (a) a ball striking face member; and (b) a club head body attached to or integrally formed with the face member. One body component of the club head (e.g., a weight or cover member) may be formed from a transparent, partially transparent, or translucent material. In some club head structures, an external weight member may extend around a part of a club head body member and beyond or outside of at least a portion of the body member's exterior perimeter (e.g., rearwardly, laterally toward a toe side, and/or laterally toward a heel side of the club head body, beyond the exterior perimeter portion, when viewed from overhead). Golf club structures that include golf club heads, e.g., of the types described above, and methods of constructing and/or using such clubs and club heads, also are described.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.

Abstract: A ball striking device, such as a golf club, includes a head with a face having a ball striking surface configured for striking a ball, a main body member connected to the face and having an engagement surface located in the rear side, a removable body member removably connected to the main body member, and a connecting element removably connecting the removable body member to the main body member. The connecting element includes a moveable engaging member that is moveable between a locked position, where the engaging member engages the engagement surface to retain the removable body member to the main body member, and an unlocked position, where the engaging member does not engage the engagement surface and the removable body member is removable from the main body member.

Abstract: A golf club head is disclosed that includes a weight integral to a bridge member extending across a cavity back golf club head. The weight modifies a position of a center of gravity of the golf club head. The weight is independently movable in multiple directions to further vary the center of gravity of a golf club head.

Abstract: A golf club with a golf club head having one or more adjustable weights is presented. The club head may include a club head body having a recessed formed therein. In some arrangements, the recess may be formed in a sole portion of the club head body. The golf club head further includes an adjustable weight that may be rotated from a first position to a second position to adjust the weight characteristics, and thus the performance characteristics of the golf club. In some arrangements, the adjustable weight and/or any hardware, fasteners, etc. associated with the adjustable weight may be constantly connected to the golf club head such that adjustment of the weight does not include removal of the weight and/or any hardware, fasteners, etc.

Abstract: Ball striking devices, such as golf club heads (including putter heads), have a high moment of inertia about their center, to help prevent twisting and mis-hits, particularly when the ball striking device hits the ball at a somewhat off-center position. The ball striking head of the ball striking device may be structured and/or weighted (optionally with separately attachable weight elements) to have a moment of inertia about a center of the ball striking surface of at least 10,000 g/cm2, and in some examples, the moment of inertia may be at least 11,000 g/cm2, or even at least 12,000 g/cm2. In some examples, the moment of inertia may be at least 20,000 g/cm2, or even at least 25,000 g/cm2 or at least 28,000 g/cm2.