Abstract: A golf club (40) having a club head (42) with a face component (60) and an interchangeable aft-body (61) is disclosed herein. The face component (60) has a striking plate portion (72) and a return portion (74). The aft-body (61), which is attached to the return portion (74) of the face component (60), is selected from a plurality of aft-bodies, each having a different center of gravity location. Each of the aft-bodies (61) is composed of a crown portion (62), a sole portion (64), and a plurality of weights (122) for adjusting location of the center of gravity. An aft-body (61) is selected from the plurality of aft-bodies (61) based on its center of gravity location, so as to provide the club head (40) with a center of gravity location suited to a particular golfer.

Abstract: A golf club head includes a body having a front face with a cavity formed therein. The cavity has at least one aperture passing through the cavity bottom wall to the rear surface of the club head body. A face insert is installed in the cavity by applying an adhesive layer between the face insert and the bottom of the cavity. As the face insert is pressed into the cavity, air and any excess adhesive escapes through the aperture to the rear surface of the club where it can easily be removed by wiping with solvent.

Abstract: A golf club head has two metal outer ends to and a mid-section composed of multiple side-by-side, polymeric laminations (14) directed substantially transversely to the club face (4). In one version the threaded rod (12) joins the ends compressing the laminations. The laminations allow bands of color or opacity to create a distinctive appearance. In another version the laminations are replaced by a moulded block of polymer (24).

Abstract: A golf club head which includes a main body provided with a socket, and a weight member disposed in the socket, wherein the socket is a tubular portion extending to the inside of the main body and deforming a through-hole extending therethough, the weight member having a main portion accommodated by the through-hole, and secured in the through-hole by a crushable portion which, after being crushed by the application of pressure causes the socket to expand, locking the weight member in the socket.

Abstract: A golf club head (20) having a body (22) with a front wall (30) with an opening (32) and a striking plate insert (40) is disclosed herein. The body (22) is preferably composed of a light weight material such as a magnesium alloy or an aluminum alloy. A ribbon (28) of the body (22) has a recess (52) therein for placement of a rear weighting member (50). The golf club head (20) preferably has a volume between 300 cubic centimeters and 500 cubic centimeters. The golf club head (20) preferably has a mass between 105 grams and 300 grams.

Abstract: A hollow metal club head comprises a face portion whose front surface defines the club face, and a turnback wall extending backward from the circumferential edge of the face portion, wherein a head volume is in a range of not less than 440 cc, a height of the club face is in a range of from 55 to 85 mm, and a surface area of the club face is in a range of from 4000 to 6500 sq. mm. In a front end zone of the turnback wall and a peripheral zone of the face portion which are adjacent to each other through a junction between the turnback wall and the face portion, the ratio Rf/Rh of a zone rigidity Rf=(Ef×tf3) of the peripheral zone to a zone rigidity Rh=(Eh×th3) of the front end zone is in a range of from 4.0 to 12.0.

Abstract: The partial crown portion member comprises: the edge frame made from metal; the shell body made from metal and provided inwardly of the edge frame; the joining member made from resin and provided in between the inner edge of the edge frame and the edge of the shell body so as to envelop the inner edge of the edge frame and the edge of the shell body. The inner edge of the edge frame is formed with the first through-hole, while the edge of the shell body is formed with the second through-hole. The joint member made from resin envelops the portion where the inner edge of the edge frame and the edge of the shell body by casting manner. Accordingly, the edge frame and the shell body made from different kinds of metals can be strongly joined.

Abstract: A golf ball has a substantially spherical outer surface comprised of a plurality of non-circular dimples. The dimples are formed by a plurality of lobes extending from a central hub, wherein each lobe is defined by a curved outer segment. The curved outer segments form at least a portion of the perimeter of the dimple. The dimples are comprised of at least four lobes. The dimples can also be comprised of a plurality of radiating arms emanating from a location proximate the hub of the dimple.

Abstract: A golf club head includes a golf club head body and a weight member mounted in a recession of the golf club head body. The weight member includes at least one compartment for receiving a filling material. The weight member is mounted in the recession of the golf club head body before a brazing process for bonding the weight member with the golf club head body. During the brazing process, the filling material is melted and fills a gap between the weight member and walls delimiting the recession of the golf club head body to thereby increasing bonding strength between the weight member and the walls delimiting the recession of the golf club head body.

Abstract: A multi-piece golf ball includes a core 30–40 mm in diameter, an intermediate layer including an outermost layer 0.5–2.0 mm thick, and a cover 0.5–2.0 mm thick. The core is a rubber composition mainly containing polybutadiene. The outermost layer is a resin material containing an ionomer resin in an amount of 30% by weight or more. The cover material is obtained by dispersedly blending a silicone powder in a main resin containing an ionomer resin in an amount of 50% by weight or more. The hardness of the outermost layer is harder than the hardness of the core's a center portion. The hardness of the cover is harder than the hardness of the outermost layer. A difference in hardness between the cover and the center portion of the core satisfies a relation of 10?(Durometer D hardness of cover?Durometer D hardness of center portion of core?40.

Abstract: Golf ball 1 has a core 2, a mid layer 3 and a cover 4. The mid layer 3 is composed of a matrix of which base material is a rubber or a synthetic resin, and solid particles which are dispersed in the matrix. Hardness (Shore D) Hm of the matrix is greater than hardness Hg of the solid particles. Difference between both hardness (Hm?Hg) is 5 or greater. Particle size D of the solid particles is 0.5 mm or greater. A ratio “D/T”, i.e., a ratio of the particle size D to the thickness T of the mid layer is 0.1 or greater. A proportion of the solid particles occupied in the mid layer 3 is 3% by weight or greater and 40% by weight or less. Hardness Hm of the matrix is 30 or greater. Hardness Hg of the solid particle is 40 or less.

Abstract: An iron-type golf club head (20) includes a body (22) having a front wall (28) with a ball-striking surface (40). The body (22) further includes a rear surface (54) that has external rear cavity (56) formed therein. The rear surface (54) includes an upper portion (58) and a lower portion (60). The upper portion (60) is separated from the lower portion (59) by the external rear cavity (56) and at least one groove (64, 66). The lower portion (60) of the rear surface (54) has a notch (62) formed therein, which communicates with the external rear cavity (56). The golf club head (20) preferably has high moments of inertia Izz and Ixx.

Abstract: In a golf ball comprising an elastic solid core, a mantle layer, and a resin cover having a plurality of dimples, the difference in Shore D hardness between the cover and the mantle layer is at most 10, and the dimples have a total volume of 280–350 mm3. This combination of features provides the golf ball with an excellent balance of rebound, spin and feel, and an outstanding total distance.

Abstract: A golf club head includes: a head body including a crown portion having a plurality of openings, a face portion, a toe portion, a heel portion and a sole portion; a crown part mounted to the head body so as to close the openings, and a support portion provided between the openings for supporting the crown part. The support portion is X-shaped, for example.

Abstract: An improved golf club head having an internal impact assembly configured to improve the direction and distance of travel of a golf ball. The impact assembly is configured to impact the inside wall of the club face at an impact spot immediately after the golf ball is hit to provide a kick to the golf ball so as to direct it along the desired direction of travel. The impact assembly is in a club head cavity and comprises a support member attached to the cavity, a spaced apart hammer member and a connecting member interconnecting the support member and hammer member. In a preferred embodiment, the connecting member is fixed to the support member and configured, such as being made out of graphite or the like, to flex the hammer member into the impact spot. In an alternative embodiment the connecting member is pivotally connected to the support member.

Abstract: A wood-type golf club head (40) having a major body (50), a striking plate insert (55) and a minor body (60) is disclosed herein. The major body (50) is composed of a metal material and has a front wall section (72), a return section (74), a sole section (76), a ribbon section (78) and a ledge portion (80). The minor body (50) is preferably composed of a low density material and has a crown section (62) and a ribbon section (64). The striking plate insert (55) is composed of a metal material. The minor body (60) is preferably attached by a liquid adhesive to the ledge section (80) of the major body (60). At least one stiffening member (122) disposed on the interior surface of the sole section (76) of the major body (50) increases the sound of the golf club head (40) during impact with a golf ball.

Abstract: An iron type golf club head comprising: a face plate provided with face grooves; and a head main body arranging the face plate on a front surface thereof, wherein the face plate comprises a peripheral edge part firmly fixed to the head main body, and a non-supported part forming an area surrounded by the peripheral edge part and having a back surface apart from the head main body, and the non-supported part satisfies the following equations (1), (2) and (3): 1.1?ha/hb?1.6;??(1) 1.1×(ha+hb)/2?hc?1.5×(ha+hb)/2;??(2) 18 (mm)?hb?38 (mm)??(3) (in which ha is a toe side height (mm) of the face groove in an end portion closest to the toe side, hb is a heel side height (mm) of the face groove in an end portion closest to the heel side, and hc is an intermediate height (mm) of the face groove in an intermediate position between the end portion on the toe side and the end portion on the heel side).

Abstract: A golf putting aid is used with a putter having a handle, a putter head, and an elongated putter shaft. The putting aid includes an elongated member affixed to the putting aid and an attachment member capable of detachably securing the putting aid to the shaft of a putter. The method comprises attaching the putting aid to the shaft of the putter and using a level on the putting aid to determine the slope of a green between two points on the surface of the green. The putting aid may be used either with, or without the putter.

Abstract: A wood-type golf club head (40) having a major body (50), a striking plate insert (55) and a minor body (60) is disclosed herein. The major body (50) is composed of a metal material and has a front wall section (72), a return section (74), a sole section (76), a ribbon section (78) and a ledge portion (80). The minor body (50) is preferably composed of a low density material and has a crown section (62) and a ribbon section (64). The striking plate insert (55) is composed of a metal material. An epoxy-based composition (200) is placed at a face-sole junction (205) to lower the amplitude of the sound of the golf club head (40) during impact with a golf ball.

Abstract: A two-piece solid golf ball having long flight distance when hit by a middle iron club to a driver, large spin amount when hit by a short iron club and the like and excellent controllability, while maintaining good shot feel as good as thread wound golf ball, said golf ball including a core and cover, wherein the core mainly contains cis-1,4-polybutadiene, with the surface hardness (D) of the core being higher than the center hardness of the core by not less than 15, and the cover is formed from a cover composition mainly containing a polyurethane-based thermoplastic elastomer as a base resin having a hardness (A) of 35 to 55 which is lower than that of (D), and assuming that the total dimple volume is represented by B (mm3), the product AB is within the range of 20,000 to 30,000.