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 body connected to the face, and at least one channel in the ball-striking surface of the face. The region of highest COR response of the face is directionally enlarged toward the channel. Depending on the size, shape, and location of the channel, the face can be altered to provide greater COR response and increased energy transfer for impacts at specific locations on the face.

A golf club includes a tubular club shaft having first and second ends, a weight member, and a grip attached to the club shaft. The weight member includes a weight main body made of metal and a cover formed by rubbery elastomer. The weight main body includes a first end face, a second end face, and an outer side face extending between the first and second end faces. The cover includes a side cover portion covering an entire region of the outer side face of the weight main body, a first end cover portion covering the first end face, and a flange. The weight member is installed to the club shaft in such a manner that the side cover portion is located in a space of the club shaft and that the flange engages with the first end of the club shaft outwardly of the club shaft.

A method of manufacturing a golf club head with a plurality of stiffening members proximate the face, and particularly solid rods or a plate with one or more cutouts, is disclosed herein. The method includes the steps of preparing a wax of a golf club head body having at least one through-hole, a hollow interior, and at least one receiving pocket, preparing waxes of one or more stiffening members, inserting the wax of the stiffening members into the through-hole and seating its opposite end in the receiving pocket, bonding each of the stiffening members to the body with an adhesive material to form a combined wax mold, and casting a golf club head from the combined wax mold.

A method and an apparatus for playing golf on a hard surface comprises a replaceable striking pad attached to a conventional golf club head by means of at least one attachment means, a spiked ball, a portable ball trap to trap the spiked ball and an optional remotely controlled vehicle to position the portable ball trap. The replaceable striking pad includes a small lip at a bottom end on a front face and a holding ledge having substantially curved edges extending away from the bottom end of the front face. The holding ledge is adaptable to wrap around a bottom sole of the golf club head. The portable ball trap includes a thin flat platform with tapered edges, a central threaded pole positioned on the thin flat platform and a circular frame having a plurality of hinged tabs threaded to the central threaded pole.

A method and an apparatus for playing golf on a hard surface comprises a replaceable striking pad attached to a conventional golf club head by means of at least one attachment means, a spiked ball, a portable ball trap to trap the spiked ball and an optional remotely controlled vehicle to position the portable ball trap. The replaceable striking pad includes a small lip at a bottom end on a front face and a holding ledge having substantially curved edges extending away from the bottom end of the front face. The holding ledge is adaptable to wrap around a bottom sole of the golf club head. The portable ball trap includes a thin flat platform with tapered edges, a central threaded pole positioned on the thin flat platform and a circular frame having a plurality of hinged tabs threaded to the central threaded pole.

The invention relates in general to lacrosse heads, and more particularly to preparation of a lacrosse head that is optically clear, but still maintains the desired stiffness and durability characteristics for optimal play.

A method is provided. A center of mass of the bat is calculated based at least in part on the physical characteristics, the length, and the drop. A first and second mass distribution for an insert having a central axis and a length is calculated based at least in part on the calculated center of mass. The first mass distribution is symmetric about the central axis along the entire length, and the second mass distribution includes a first density for at least one low mass region and a second density for a high mass region with the second density is greater than the first density. Then, the insert is 3D printing based at least in part on the first and second mass distributions.

A golf club head includes a striking face including a face center, a top portion, a sole including a leading edge and a trailing edge, and a rear side opposite the striking face. The rear side includes a channel configured to permit bending at least a portion of the sole to cause plastic deformation to change a bounce angle defined as an angle between a virtual sole line and a virtual ground plane when the golf club head is orientated in a reference position where the golf club head is addressed to hit a golf ball.

A golf club shaft system and golf club shaft possessing unique flexural and torsional rigidity profiles, while providing significant adjustability to fine tune the shaft to a particular golf swing.

A golf club incorporating a plurality of projections extending from on the crown section.