A golf club head includes a body defining an interior cavity. The body includes a sole positioned at a bottom portion of the golf club head, a crown positioned at a top portion, and a skirt positioned around a periphery between the sole and crown. The body has a forward portion and a rearward portion. The club head includes a face positioned at the forward portion of the body. In some embodiments, the crown includes a lattice-like structure having thin regions surrounded by a web of relatively thicker regions. In some embodiments, the club head includes one or more stiffening tubes attached between the sole and the crown to improve the acoustic performance of the golf club head.

A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Hosel and shaft sleeve alignment features provide discrete orientations between the shaft and club head.

A golf club according to one aspect of the present invention includes a shaft, a golf club head including a hosel containing a hole to attach the shaft, and a sleeve system including a body attached to a tip of the shaft and inserted together with the shaft into the hole of the hosel and an adaptor attached to the body so as to enable an adjustment of an axis-directional position with respect to the body and engaging with an upper end of the hosel.

A golf putter includes a head and a shaft. The head has a head body having a top surface that is formed with a mounting groove. The shaft has a main body portion and a connecting portion connected to the main body portion. The connecting portion is inserted into the mounting groove, is movable along the mounting in a longitudinal direction, and has a non-circular cross-section, such that the connecting portion is non-rotatable relative to the mounting groove of the head.

A golf putter includes a head and a shaft. The head has a head body having a top surface that is formed with a mounting groove. The shaft has a main body portion and a connecting portion connected to the main body portion. The connecting portion is inserted into the mounting groove, is movable along the mounting in a longitudinal direction, and has a non-circular cross-section, such that the connecting portion is non-rotatable relative to the mounting groove of the head.

A golf club head comprises a body having a face, a crown and a sole together defining an interior cavity. The body having a channel located on the sole and extending generally from a heel end of the body to a toe end of the body. A weight member movably positioned within the channel such that a position of the weight member within the channel is able to be adjusted, thereby adjusting a location of a center of gravity of the body. Additionally, adjustment of the weight member provides a maximum x-axis adjustment range of the position of the center of gravity (Max CGx) that is greater than 2 mm and a maximum z-axis adjustment range of the center of gravity (Max CGz) that is less than 2 mm.

A golf club incorporating an interchangeable shaft system includes a shaft, a shaft sleeve, a club head. The shaft sleeve is coupled to an end of the shaft and is received in a hosel included in the club head. The shaft sleeve is removably coupled to the club head. Alignment features on the components provide discrete orientations between the shaft and club head. The shaft sleeve may be constructed from non-metallic material.

An adjustable interchangeable golf club with a faceplate-based platform to receive components for enhancing and controlling various aspects that control the golf ball flight and spin characteristics. Disclosed are components for adjusting loft and bounce angle, and interchangeable faceplate and rear flange styles. Novel milled surface roughness for enhanced spin control is disclosed along with new milling methods for achieving optimal surface roughness. Lightweight hosel and consequent redistribution of mass in club head greatly increases the inertia of the golf club. Centrally located hosel position aids in club head stability on off-center hits. This results in a golf club that hits the ball higher, straighter, longer, and with increased ball spin characteristics.

An apparatus for measuring loft and lie of a golf club head with better accuracy is disclosed herein. More specifically, the present invention discloses an apparatus that utilizes a high precision camera that focuses on the striking face portion of the golf club head, working in conjunctions with encoders near the shaft portion of a golf club head, to instantaneously provide precision measurement of the loft and lie of the golf club head and feedback to the operator in order to allow for more precision adjustment to the loft and lie of the golf club head.

A ball striking device has a face with a striking surface and a body extending rearwardly from the outer periphery of the face. A channel extends across at least a portion of the sole, and includes a trough defined between front and rear edges and extending in a heel-toe direction. The device further has internal interconnection structure for connection of a shaft to the head. The device may have a hosel connected to the body proximate the heel, with the hosel having the internal interconnection structure adapted for connection of the shaft to the hosel. A bore or access opening may be provided that intersects the channel, to access the interconnecting structure. The device may further include one or more stiffening ribs on the sole.