Abstract: A golf club head having a body having a first receptacle having ant aperture and a weight retention member affixed to the receptacle, the weight retention member having an opening, the weight retention member configured to receive a weighted insert, wherein at least a portion of the receptacle is located on the sole, wherein the receptacle includes a pair of perimeter walls, each of the perimeter walls substantially perpendicular to the sole adjacent the perimeter walls, wherein the pair of perimeter walls are separated by the aperture and are substantially parallel to one another.

Abstract: The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and significant tungsten weight members at the heel and toe.

Abstract: Provided is a putter in golf clubs for use in swinging and putting beside a golf ball while looking at front and keep watching the moving trace of the golf ball, which is titled as a look & watching side swing putter by which a golfer stands at the same point of place where he examined the green grass state and the distance previously, and practices swings while checking the estimated imaginary putting line of the golf ball, and executes putting of the golf ball on the side thereof like bowling while keep watching the golf ball, thereby reducing the putting errors or strokes to wrong directions due to the differences in views direction depending on putting posture and improving straight-line movement of the golf ball at putting.

Abstract: A golf club head with an interchangeable or reversible sole rail system having a rail member configured to be received within one or more channels formed on the club head. The rail system allows the player to employ rails along a surface of the club head to improve the interaction between the club head and the ground during the swing.

Abstract: Embodiments of adjustable length golf clubs and methods of manufacturing adjustable length golf clubs are generally described herein. Other embodiments may be described and claimed.

Abstract: A club 2 includes a head 4, a shaft 6 and a grip 8. A club length L1 is equal to or greater than 43 inches and equal to or less than 48 inches. A frequency of the club is equal to or greater than 240 (cpm) and equal to or less than 290 (cpm). A club inertia moment Ix is equal to or greater than 6.90×103 (kg·cm2) and equal to or less than 7.50×103 (kg·cm2). A ratio Iss/Ix is equal to or greater than 0.085 and equal to or less than 0.115. The inertia moment Ix is a club inertia moment about a swing axis Zx. The moment Iss is a shaft inertia moment about the swing axis Zx.

Abstract: The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and significant tungsten weight members at the heel and toe.

Abstract: Provided is a golf club enabling the rotation position of an adapter to be viewed without disassembling a coupling structure for coupling a shaft and a golf club head. This golf club includes a shaft, a golf club head having a hosel portion, a first adapter that is accommodated in the interior space of the hosel portion through a shaft attachment hole in the hosel portion, a second adapter that has a through-hole through which the first adapter passes, and at least a portion arranged outside the attachment hole, and a fixing member detachably fixing the first adapter in the interior space of the hosel portion. The shaft is coupled with an inclination relative to the first adapter, the first adapter is coupled with an inclination relative to the second adapter, and the first adapter and the second adapter are coupled so as to be capable of axial rotation.

Abstract: A golf club has within the grip a main device, a connector, a wireless module, an antenna, a light emitting element, and an optical fiber. The main device is a device that includes a sensor such as a motion sensor, a circuit such as a CPU, and a battery. The light emitting element is an indicating means that emits light in accordance with the state of a component mounted in the golf club. The light emitted by the light emitting element is guided to the grip end by the optical fiber and emitted to the outside of the grip via the grip end.

Abstract: A golf club shaft which satisfies strength and is lightweight is provided by the present invention. This golf club shaft comprises one or more fiber-reinforced resin layers, and is characterized by satisfying the following relationship (1), wherein x [mm] is the displacement in a cantilever bending test, M [g] is the mass of the golf club shaft, and L [mm] is the length thereof, and by satisfying the following strength standard values [1]-[4]: M×(L/1168)<49.66 e?0.0015x (relationship 1); [1] the three-point bending strength at T-90 (the position 90 mm apart from the smaller-diameter end) is 800 N or higher; [2] the three-point bending strength at T-175 (the position 175 mm apart from the smaller-diameter end) is 400 N or higher; [3] the three-point bending strength at T-525 (the position 525 mm apart from the smaller-diameter end) is 400 N or higher; and [4] the three-point bending strength at B-175 (the position 175 mm apart from the larger-diameter end) is 400 N or higher.

Abstract: Embodiments of golf coupling mechanisms are presented herein. Other examples and related methods are also disclosed herein.

Abstract: The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and significant tungsten weight members coupled to at least the toe and a heel weight member coupled in a hosel cavity.

Abstract: The present invention is directed to a golf club head comprising one or more center of gravity and bias adjustment features. In some embodiments, the golf club head comprises an elongated cartridge having one or more sockets or weight ports to receive weight plugs, the arrangement of which can be changed to adjust the mass properties of the golf club head. The orientation of the cartridge itself can also be reversed to adjust the mass properties. In other embodiments, the golf club head comprises at least one semicircular weight ring that extends around the rear portion of the golf club head, and is removable and replaceable to adjust the mass properties of the golf club head. In still other embodiments, these features are combined on one head.

Abstract: According to one aspect of the present invention there is provided an adjustable connector including at least two parts, each having a main body with a bore having a longitudinal axis therein, wherein an external surface of the main body of a first part is configured to bear against an internal surface of the bore of a second part when the first part is at least partially inserted into the bore of the second part to form a connection, characterized in that the positioning of the bores with respect to the main bodies is such that when the parts are connected to each other, rotation of one part with respect to the other changes the inclination of the longitudinal axes of the bores with respect to one another.

Abstract: A golf club head includes a body having a heel portion, a toe portion, a sole portion, and an outer surface, a strikeface having a geometric center, a head center of gravity, and a weight member including a weight pad. The weight member is configured to be repositionable by the user to a first position or a second position. The club head having the weight member in the first position shifts the head center of gravity toward the strikeface, and the club head having the weight member in the second position shifts the head center of gravity away from the strikeface.

Abstract: A golf club head including a body having a face, a sole, a crown, and a skirt joining the face, sole and crown, the body having a center of gravity, wherein the body includes an open end and a terminal end, the terminal end opposite the open end, a weighted insert having a heavy end and a lighter end, the lighter end opposite the heavy end, wherein the cavity is configured to receive the weighted insert through the open end, wherein the cavity is configured to receive the weighted insert through the open end in both a first configuration and a second configuration, and wherein said weighted insert comprises a slideable flange.

Abstract: A lightweight compression molded multicolor golf grip having at least a first section and a second section of differing colors and composed of elastomer compounds having a density of less than 0.90 g/cc, and joined by cross-linking across a sharply defined cross-color interface having an interface transition zone beyond which there is no mixing of the colors. The grip has a soft feel and unique compression characteristics achieved in some embodiments through the controlled use of an expanding blowing agent in a rubber compound including an EPDM mixture. Achieving the sharply defined cross-color interface is due in part to the use of complementary geometries at opposing interface edges to increase the stability of the interface and reduce the flow during molding associated with the increased viscosity of low density rubber compounds, promote cross-linking of the sections, and better distribute and control the consolidation pressure.

Abstract: 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.

Abstract: To provide a golf club shaft that can provide a moderate rigidity and enhance an impact strength. A shaft 6 includes full length layers s3, s4, s7, s8 and s9 provided wholly in a longitudinal direction of the shaft, and tip end partial layers s1, s2, s10, s11 and s12 provided on a tip end part of the shaft. The full length layers include bias layers s3 and s4 and straight layers s8 and s9. The tip end partial layer includes an inner glass fiber reinforced layer s1, and an outer low elastic carbon fiber reinforced layer s10 or an outer glass fiber reinforced layer s10 which is disposed outside the inner glass fiber reinforced layer s1. The low elastic carbon fiber has a tensile elastic modulus of 22 ton/mm2 or less. In the shaft 6, a shaft weight in terms of 46 inches is 55 g or less.

Abstract: Golf clubs and golf club heads having a weight member that is configurable in multiple positions to alter the performance characteristics of the golf club head are presented. In some examples, the weight member may be arranged in a sole of the golf club head and may include ends having different weighting characteristics. For instance, one end may be heavier or denser than another end of the weight member. The difference in weight characteristics may be due to different materials used to form the different ends, different construction of the ends, and the like. The position of the weight member may be adjusted to alter the performance characteristics of the golf club head. For instance, the weight member may be removed and rotated to position a heavier end where a lighter end was previously positioned.