Abstract: A golf club head system and a golf club head for inclusion into a golf club are provided. The golf club head system includes two or more rear or secondary body members, each configured for interchangeable attachment to a front or main body member. Each rear body member may have a different external shape, and each rear body member may have a different combination of center-of-gravity and moment-of-inertia characteristics. The system further includes a detachable attachment element for interchangeably and detachably attaching the rear body members to the front body member. The system may further include the front body member, wherein the front body member has a striking surface.

Abstract: This disclosure provides a golf ball that includes carbon dioxide absorbents in order that the golf ball may reduce atmospheric carbon dioxide levels to aid in alleviating global warming. The golf ball may include an intermediate layer that is substantially impermeable to water, in order to ensure that the golf ball's core is not degraded by water produced by the carbon dioxide absorbance reaction. The chemical absorbents may be encapsulated in microcapsules so that carbon dioxide is not absorbed until the golf ball is used by a golfer.

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: The present disclosure provides to a kit for customizing and recycling golf balls, and related methods. The kit includes one or more sets of golf ball covers, may include one or more sets of golf ball cores, and may further include a golf ball cover removal device and a golf ball cover application device. A golfer may select a golf ball cover from a set based on a desired play characteristic. For example, the golfer may select a relatively hard cover from a set of golf ball covers having different hardness values. The golfer may then apply the selected golf ball cover to a golf ball core using the golf ball cover application device. The core may be selected from a set of cores in the kit, or the core may be obtained from a recycled golf ball using a golf ball cover removal device.

Abstract: Generally disclosed is a golf ball having a core and a cover layer. The cover layer includes areas that are hard, and areas that are soft. The hard areas make up 20% to 60% of the total surface area of the cover layer, preferably 30% to 50%. The hard areas may correspond to the dimples, while the soft areas may correspond to the land between the dimples. The hard areas may be at least about 3 units on the Shore D scale harder than the soft areas, preferably at least about 5 units. The hard areas may be formed in various geometric shapes, or in the shape of a graphic or logo, and be visibly colored. As a result of the arrangement of the hard areas and the soft areas, the golf ball simultaneously achieves good flight distance and good feel.

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: Generally disclosed is a golf ball having a core and a cover layer. The cover layer includes areas that are hard corresponding to the dimples, and areas that are soft corresponding to the land between the dimples. The cover layer may be selectively treated, such as by heating, to achieve a difference in hardness using a single cover layer material. Alternatively, the cover layer may be selectively coated with a coating material having a different hardness. As a result of the arrangement of the hard dimples and the soft land, the golf ball achieves reduced spin, and greater distances, when struck with a larger force (such as during a dive) while also achieving increased spin, and better control, when struck with a smaller force (such as during a chip).

Abstract: Generally disclosed is a golf ball having a core and a cover layer. The cover layer includes areas that are hard corresponding to the dimples, and areas that are soft corresponding to the land between the dimples. The cover layer may be selectively treated, such as by heating, to achieve a difference in hardness using a single cover layer material. Alternatively, the cover layer may be selectively coated with a coating material having a different hardness. As a result of the arrangement of the hard dimples and the soft land, the golf ball achieves reduced spin, and greater distances, when struck with a larger force (such as during a dive) while also achieving increased spin, and better control, when struck with a smaller force (such as during a chip).

Abstract: The present disclosure relates to a handheld clamp device for applying heat to a golf ball. The clamp may have two lever arms each attached at one end to a pivot. A golf ball receiving unit may be attached to each lever arm at the opposite end as the pivot. Each golf ball receiving unit may include a heating element. The internal heating surface of each golf ball receiving unit may contain a pattern, which can be a dimple pattern. When in use, the handheld device may heat the surface of a golf ball such that the pattern on the internal heating surfaces forms a dimple pattern into the surface of the golf ball. The handheld clamp device may be included as part of a kit, along with multiple sets of golf ball receiving units, and sometimes at least one golf ball.

Abstract: A golf club with a golf club head having a wear indicator is provided. The wear indicator may be located on the club head face, the hosel, the sole portion or the rear portion of the club head body. Also, multiple wear indicators may be provided on separate portions of the club head. Inserts may be used to provide a wear indicating portion. A coating may be provided to serve as a wear indicator.

Abstract: An iron type golf club head includes a club head having a first body component defining a striking face, and a second body component releasably secured to the first body component with a fastener. The second body component defines at least a perimeter portion of a rear face of the club head body and may define substantially an entire rear face of the club head body.

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: 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: An iron type golf club head includes a club head having a first body component defining a striking face, and a second body component releasably secured to the first body component with a fastener. The second body component defines at least a perimeter portion of a rear face of the club head body and may define substantially an entire rear face of the club head body.

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: An article of footwear includes a sole assembly and an upper secured to the sole assembly and has an exterior surface. At least one solar cell on the exterior surface of the upper is configured to provide power to a power receiving device.