Abstract: An iron-type golf club head comprises a head main portion having a face for hitting a golf ball, and weight members made of metallic material having heavier specific gravity than the head main portion. The head main portion has a tubular portion provided on a heel side of the face and having a shaft inserting hole. The tubular portion is provided continuously on the lower side of the shaft inserting hole with a bottomed hole part for arranging the weight members. The weight members include a heel-side weight member disposed in the bottomed hole part.

Abstract: A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Abstract: A golf club head comprises a sole, a recessed sole port in the sole; and a rotatably adjustable sole piece adapted to be at least partially received within the sole port and comprising a central body having a plurality of contact surfaces adapted to contact the sole port and being offset from each other along a central axis extending through the central body of the sole piece. The sole piece can be positioned at least partially within the sole port at five or more rotational and axial positions with respect to the central axis, wherein at each rotational position, at least one of said contact surfaces of the central body contacts the sole port to set the axial position of the sole piece. The sole port and/or the sole piece can be generally pentagonal in shape.

Abstract: A golf putter having a head with a negative loft angle on the two ball striking surfaces, heel, and toe surfaces. The overall weight of the putter may be adjusted and the center of gravity of the putter may be shifted laterally as desired with removable weights that are coupled to the putter head.

Abstract: A unique golf club putter head having a fluted rear mass design. This rear mass is shaped as a concave mass that merges with the sole of the blade and dips just below the sweet spot of the head at the center thereof. It lowers the center of gravity of the head along the sweet spot while also controlling the mass at heel and toe. Fluting the rear mass permits controlled variation in the distribution of the mass from heel-to-center-to-toe so that it doesn't overwhelm the ball-hitting surface and instead produces stable smooth roll.

Abstract: A golf club head comprises: a hollow structure having an insertion-opening in the outer surface of the golf club head; a quick-release lid of the insertion-opening; a tubular part disposed in a hollow of the hollow structure and having a bottomed hole with which the insertion-opening communicates; and a gravity point adjuster. The gravity point adjuster comprises: a heavy-weight member having a specific gravity and a length L2; a light-weight member having a specific gravity less than that of the heavy-weight member and a length L1 more than the length L2; and an elastic member having a specific gravity less than that of the heavy-weight member, and an elastic modulus lower than those of the heavy-weight member and light-weight member. The heavy-weight member, light-weight member and elastic member are inserted in the bottomed hole by the use of the insertion-opening so that their relative positions relative to the bottomed hole can be changed easily by the golfer himself or herself.

Abstract: The present invention is directed to an iron-type golf club head with one or more passages travelling through a portion of the body. The passages may be accessible in the toe, heel, rear, or sole, or any combination thereof. The passages may be substantially vertical, substantially horizontal or a combination thereof. Weight inserts may be placed in one or more of the passages. In addition, one or more weight inserts may be coupled to the rear of the club head. The weight inserts may have varying densities. The present invention may also include a removable face insert. A plurality of weight inserts may be attached to the rear surface of the face insert.

Abstract: A golf club head having a face component, a crown, and a composite sole or a composite body patch with one or more weight ports for receiving one or more weight inserts is disclosed herein. At least part of each of the weight ports is integrally formed in the composite sole or composite body patch, and each of the weight ports includes an upper edge, a lower edge, and a wall having a variable thickness and varying radius.

Abstract: A golf club head 1 comprising a hollow head body 1b and a gravity center adjuster 14 fixed to the head body 1b and comprising a first weight member 15 and a second weight member 16 having a lower specific gravity than the first weight member 15, wherein the first and second weight members are provided in the head body 1b so that the locations thereof are exchangeable with each other, and a depth GL of the center of gravity which is a distance from the head's center of gravity G to a sweet spot SS of a face 2 can be changed by location exchange between the first and second weight members 15 and 16 without substantially changing a distance GK of the center of gravity which is the shortest distance from an axial center line of a shaft-inserting hole 7a to the head's center of gravity G.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, a sleeve including a top portion and a middle portion connected to the top portion is described. The middle portion includes a thin wall thickness. A bottom portion is connected to the middle portion including a plurality of engaging surfaces. A central longitudinal axis and an offset angle offset from the central longitudinal axis is described. The offset angle allows a maximum loft change of about 0.5 degrees to about 4.0 degrees. The total weight of the sleeve is less than 9 g.

Abstract: A golf club head is presented comprising a sole including a removable weight member secured to the sole via a non-threaded attachment assembly. Further, the removable weight member has a large surface area relative to its thickness, resulting in a chip-like or wafer-like weight member. This design allows the mass of the weight member to be spread substantially along the surface of the sole as opposed to in the interior of the club head. The golf club head may comprise more than one removable weight member. A weight member of the present invention may comprise one or more discrete areas of higher basis weight or higher density.

Abstract: A golf club head comprises: a hollow structure having an insertion-opening in the outer surface of the golf club head; a quick-release lid of the insertion-opening; a tubular part disposed in a hollow of the hollow structure and having a bottomed hole with which the insertion-opening communicates; and a gravity point adjuster. The gravity point adjuster comprises: a heavy-weight member having a specific gravity and a length L2; a light-weight member having a specific gravity less than that of the heavy-weight member and a length L1 more than the length L2; and an elastic member having a specific gravity less than that of the heavy-weight member, and an elastic modulus lower than those of the heavy-weight member and light-weight member. The heavy-weight member, light-weight member and elastic member are inserted in the bottomed hole by the use of the insertion-opening so that their relative positions relative to the bottomed hole can be changed easily by the golfer himself or herself.

Abstract: A golf club head according to this invention includes a hollow head body, cylindrical body, weight member, and fixing member. The hollow head body has a projection formed along the periphery of the sole, a recess formed inside the projection, and an opening formed in the projection so as to extend from the toe side to the back side. The cylindrical body is provided in the recess of the head body, and includes its one end which engages with the inner wall of the projection on the heel side, and its other end which extends to the vicinity of the opening and can move along the opening. The weight member is retractably, detachably inserted in the cylindrical body. The fixing member is a detachable member which fixes the other end of the cylindrical body onto the projection.

Abstract: A hollow golf club head with a concave portion is disclosed and claimed. The club head includes a metallic portion and a light-weight portion, which may be formed of plastic, composite, or the like. The concave portion allows the club designer to make a club head having very thin portions while still maintaining the requisite structural integrity. Convex bulges may optionally be provided to house weight inserts to enhance the playing characteristics of the golf club. The metallic portion of the club head may take on the appearance of a frame, into which several light-weight inserts are positioned. These light-weight inserts may be positioned in the crown, skirt, and sole of the club head. The club head may be formed by co-molding, eliminating the need for welding or adhesives, freeing mass to be used in more beneficial ways. The club head may be large to increase playability and forgiveness.

Abstract: A golf club head of the wood-type, including: a body defining an interior cavity and including a ball-striking face, a sole, a crown, and a ribbon extending rearwardly from the face; an elongated groove that extends along a portion of the ribbon; a weight slidably disposed in the elongated grove; and a fastener affixed to the weight capable of selectively fixing a location of the weight. Other aspects, features, and embodiments are also claimed and described.

Abstract: Wood-type golf club heads include: (a) a ball striking face; (b) a club head body engaged or integrally formed with the ball striking face, wherein the club head body includes a sole portion, wherein the sole portion includes a slot or rail defined therein; and (c) a weight member at least partially located within the slot or rail. The weight member may be mounted at plural positions along the slot or rail (optionally at least partially within a weight cartridge member provided with the club head body). The weight member also may be movably engaged with the weight cartridge member, slot, rail, and/or other portion of the club head body. Golf clubs including these club heads and methods of making and using such golf clubs and golf club heads also are described.

Abstract: A golf club head having integrally attached weight members is disclosed and claimed. The club head body defines at least a toe chamber and a heel chamber. Weights of variable mass are positioned within the chambers, moving the club head center of gravity back and down.

Abstract: A golf club head according to this invention includes a hollow head body, cylindrical body, weight member, and fixing member. The hollow head body has a projection formed along the periphery of the sole, a recess formed inside the projection, and an opening formed in the projection so as to extend from the toe side to the back side. The cylindrical body is provided in the recess of the head body, and includes its one end which engages with the inner wall of the projection on the heel side, and its other end which extends to the vicinity of the opening and can move along the opening. The weight member is retractably, detachably inserted in the cylindrical body. The fixing member is a detachable member which fixes the other end of the cylindrical body onto the projection.

Abstract: The present invention is directed to an iron-type golf club head with one or more passages travelling through a portion of the body. The passages may be accessible in the toe, heel, rear, or sole, or any combination thereof. The passages may be substantially vertical, substantially horizontal or a combination thereof. Weight inserts may be placed in one or more of the passages. In addition, one or more weight inserts may be coupled to the rear of the club head. The weight inserts may have varying densities. The present invention may also include a removable face insert. A plurality of weight inserts may be attached to the rear surface of the face insert.

Abstract: A golf club head has a face, a hosel, and a hollow body. The body includes an outer peripheral region, when viewed from above, and center portions on the upper surface and sole, respectively. The outer peripheral region has a weight-per-unit of surface area which is greater than the weight-per-unit of surface area of the center portions. The weight differential may be accomplished by molding ports into the hollow body around the periphery, which contain weight plugs. Alternately or in addition, a vertically oriented port may extend through the center portions to reduce weight.

Abstract: A golf club head of this invention includes a head body, a weight member attached to the head body, and a fixing unit to fix the weight member at one of a plurality of attachment positions of the head body. The plurality of attachment positions are located on a virtual cylindrical surface having the axis of a shaft to be mounted to the golf club head as a center.

Abstract: A generally cylindrical shaft has upper and lower ends and a handle at the upper end. A putter head has a forward face plate and a rear, a sole plate below and a weight plate above, a toe and a heel. The weight plate and the sole plate each have an upper and lower surface. The lower end of the shaft is coupled to the upper surface of the weight plate adjacent to the heel. An alignment assembly includes an upper line on the upper surface of the weight plate and a lower line on the upper surface of the sole plate parallel with and spaced from the toe and the heel. The upper line is located above and parallel with the lower line. The lower line extends rearwardly a greater distance than the upper line.

Abstract: A wood-type golf club head is described that includes a body including one or more walls defining an interior cavity and multiple weight ports formed in the body. At least one weight is configured to be retained at least partially within at least one of the weight ports. One or more fins or ribs are secured to each of the weight ports and to another structural member of the golf club head.

Abstract: A golf club head is presented comprising a sole including a removable weight member secured to the sole via a non-threaded attachment assembly. Further, the removable weight member has a large surface area relative to its thickness, resulting in a chip-like or wafer-like weight member. This design allows the mass of the weight member to be spread substantially along the surface of the sole as opposed to in the interior of the club head. The golf club head may comprise more than one removable weight member. A weight member of the present invention may comprise one or more discrete areas of higher basis weight or higher density.

Abstract: A golf club head of this invention includes a head body, a weight member attached to the head body, and a fixing unit to fix the weight member at any one of a plurality of attachment positions of the head body. The plurality of attachment positions are located on a straight line included in a plane. The plane includes the center-of-gravity position of the head body without the weight member attached thereto and is perpendicular to the toe-and-heel direction of the head body.

Abstract: The present invention is directed at a quick release connection system to facilitate customization of golf clubs. It can be used to interchange shafts, removable weights, or soleplates quickly and easily. Teeth are disposed on the inside of a frame so that a shaft may be inserted with minimal resistance, but cannot be removed without specific steps which may require the use of a simple tool. Strengthening and interlock devices are provided to ensure performance quality akin to traditional golf clubs.

Abstract: One embodiment of a golf club head having movable weights includes a body with a face plate positioned at a forward portion of the golf club head, a sole positioned at a bottom portion of the golf club head, a crown positioned at a top portion of the golf club head and a skirt positioned around a periphery of the golf club head between the sole and the crown. Two or more weight ports are formed in the body and at least two weights are configured to be retained at least partially within the weight ports.

Abstract: A golf club head having integrally attached weight members is disclosed and claimed. The club head body defines at least a toe chamber and a heel chamber. Weights of variable mass are positioned within the chambers, moving the club head center of gravity back and down.

Abstract: In one embodiment, a golf club of the so called putter type includes a cylinder shaped head having a vertical semi-through hole placed in the middle of the cylindrical surface, a second threaded hole perpendicular to the first hole for the insertion of a screw, and a shaft of adjustable length inserted in the first hole. The shaft includes a first portion inserted in said semi-through hole, vertically and orthogonally relative to said head, and further includes portions that are one opposite to the other and bent at an angle in relation to the first vertical portion, of which an angled upper portion is disposed parallel to the ground when the club is in its position of use, said end in turn supporting a grip formed by two spheres of different diameters, with the inner sphere configured to slide along the shaft.

Abstract: A wood-type golf club head is described that includes a body including one or more walls defining an interior cavity and multiple weight ports formed in the body. At least one weight is configured to be retained at least partially within at least one of the weight ports. One or more fins or ribs are secured to each of the weight ports and to another structural member of the golf club head.

Abstract: A golf club head comprises a body, a track formed in or attached to the body and having a length and a weight and weight retainer. The weight is continuously repositionable such that it can be positioned at any selected point along the track between its ends. The weight has a major dimension, and the weight retainer comprises a fastening member having a diameter not greater than about one half of the major dimension of the weight.

Abstract: The club head contains a number of blind holes arranged at appropriate places other than the hitting surface of the club head. Each blind hole is for the accommodation of a weight member. Each weight member contains at least a weight element and a fastening element. The fastening element has a threaded rod extending from the bottom of a cone-shaped head. The fastening element is squeezed into an end of the weight element with the threaded rod penetrating through the weight element and into the club head for fixation. On the other hand, the circumference of the weight element has a number of slits so that the cone-shaped head of the fastening element can force the wall of the weight element to press tightly against the hole to further enhance the fixation.

Abstract: An improved golf ball driver has a first weight positioned within the clubhead of the driver, and a first means for adjusting the first weight in a generally vertical direction within the clubhead, that is, from top to bottom thereof. The improved driver also has a second weight positioned within the clubhead, and a second means for adjusting the second weight in a generally horizontal direction within the clubhead, that is from the heel to the toe thereof. Adjusting the weights allows a golfer to eliminate natural swing problems and/or to make a desired change in the flight pattern of a golf ball when it is struck by the driver.

Abstract: The present invention relates to golf clubs having a movable weight which may be used to adjust the center of gravity of the golf club head. The golf club may include a slidable weight movable to various positions along a slot between the heel and the toe of the club. The head may include a cavity shaped to receive an insert. In one embodiment, a slidable weight consisting of a screw and a weight which may engage with each other may be configured to move along the length of the insert. During assembly, the weight may be inserted into an opening in the end of the insert and slid along a close fitting channel running the length of the insert. The weight's position along the channel may be secured by engaging the screw and tightening down the screw with a portion of the insert secured between the screw head and the weight. The assembled insert and slidable weight may then be press fit into the cavity in the head.

Abstract: A golf club head has a face, a hosel, and a hollow body. The body includes an outer peripheral region, when viewed from above, and center portions on the upper surface and sole, respectively. The outer peripheral region has a weight-per-unit of surface area which is greater than the weight-per-unit of surface area of the center portions. The weight differential may be accomplished by molding ports into the hollow body around the periphery, which contain weight plugs. Alternately or in addition, a vertically oriented port may extend through the center portions to reduce weight.

Abstract: An adjustable heel and toe weighted putter head comprising of stand-alone heel and toe weight-carrying portions spaced rearward from the face portion for increased moment of inertia and also transversely spaced apart from each other by the width of a golf ball to therein define an alignment channel. Each weight-carrying portion consists of a through bore parallel to said face portion, a through threaded insert permanently secured in said bore, selectable weight member(s) housed in said insert, and end plug setscrews that book-end and removably secure said weight member(s) to therein provide for selectable total weight and longitudinal positioning of the center of gravity. The integration of the weight system and the alignment system provides for simultaneous tangential target alignment and parallax golfer head alignment. Positive sloped truncated conical projections on the putter face help minimize ball skid, maximize tactile properties, and provide enhanced audio feedback.

Abstract: A golf club head is provided with a body that has an address position with a zero degree bounce portion on the sole and a center sole position with a multi-relief surface of the sole having a negative bounce portion. The negative bounce portion may comprise a negative 0.5 to a negative 4.0 degree surface. In one embodiment, the multi-relief surface may comprise the negative bounce portion and a cutaway portion extending to the back of the sole, which may have a depth of about 0.05 to 0.5 inch from a regular sole surface. In another embodiment, the golf club head includes a weight system to adjust the center of gravity. In one embodiment, the weight system is a tube having a weight at one end that may be inserted into the golf club head to move the center of gravity at least forward and backward within 6 mm and up and down within 6 mm. Preferably, the tube is angled downward toward the face by at least 3 degrees.

Abstract: The present invention provides a golf club head, in which a stable high-inertia moment is generated at the time of down swinging and impacting of a golf club, thereby reliably achieving the effect of increase in driving distance. A golf club head has a plurality of hollow chambers 3 arranged in mutually parallel relation and in mutually adjacent relation within a head 1 from a heel 6 toward a toe 7. Each hollow chamber 3 is faced with a sole-forming wall. A weight 9 composed of a granular body or liquid body is sealed in each of the hollow chambers 3, and each of the hollow chambers 3 is provided with an openable and closable inlet/outlet port 8 for charging the weight 9 into each of the hollow chambers 3.

Abstract: A golf putter head includes a primary body member having a striking face with a toe end and a heel end, a top surface and sole. The primary body member includes a toe wing extending back and away from the toe end of the striking face and a heel wing extending back and away from the heel end of the striking. The golf putter head also includes a first weight member extending from the toe wing and a second weight member extending from the heel wing.

Abstract: A golf club head incorporating at least one interior port adapted to receive a weighted rod which is introduced into the head and the port through an opening and cavity defined in the hosel junction. The weight and density of the rod determines the location of the head center of gravity. In one embodiment, the head includes two elongate arcuate ports adapted to receive respective elongate flexible rods adapted to conform to the shape of the port. An associated tuning package allows an individual to identify and select a recommended rod combination depending upon the desired weight and center of gravity location.

Abstract: A golf club head incorporating at least one interior port adapted to receive a weighted rod which is introduced into the head and the port through an opening and cavity defined in the hosel junction. The weight and density of the rod determines the location of the head center of gravity. In one embodiment, the head includes two elongate arcuate ports adapted to receive respective elongate flexible rods adapted to conform to the shape of the port. An associated tuning package allows an individual to identify and select a recommended rod combination depending upon the desired weight and center of gravity location.

Abstract: Several features are combined to provide a balanced putter, which assists a player in perfecting a putt stroke during practice and repeating it with the same club during play. The clubhead is substantially symmetric around the shaft and has tapered top and bottom surfaces such that the angle of the shaft relative to the sole of the putter is no more than 80 degrees. The shaft is attached at the center of the clubhead, and the clubhead and shaft are arranged so that the center of gravity of the clubhead strikes the center of the golf ball. The clubhead has a playing surface on one face that is parabolic and can be flat in the extreme. The clubhead has a practice surface on the other face that is curved, preferably elliptical, to assist the golfer in learning the proper stroke. The putter conforms to the Rules of Golf so that the player does not have to change clubs between practice and play. The club may be used for a right- or left-handed stroke.

Abstract: A putter head is provided having enhanced inertia and alignment characteristics. The putter head includes a front body and a weight body. The weight body includes a central weight extending rearwardly from the front body a prescribed distance to a rear weight. The putter head is configured such that the rear weight has a width less than the width of the front body and greater than a width of the central weight. Thus, both the longitudinal and lateral moments of inertia are improved to offer greater forgiveness and increased accuracy during putts. The central weight may include at least one and more preferably two elongated, high-density elements that are visible on a top surface of the sole between the front body and the rear weight. The visibility of the elongated elements, with optional parallel markings on the top surface, also act as alignment aids to the golfer.

Abstract: In a putter, at least one adjustable weight is provided which can be moved to different positions longitudinally along the putter head. The putter head is provided with a open channel with closed ends. The weight is slidably mounted within said outer chamber with bolts extending through a slot into a slide within the channel, and the bolt is adapted to be screw tightened into said slide to hold said weight in position. A vibration damping plate is disposed between the weight and the putter head. The front face of the putter is provided parallel vertical grooves defined in the front face, and the grooves are separated by flat lands between The grooves are arcuate in cross section so that the sidewalls of the groove slope is at an angle substantially less that perpendicular to the lands.

Abstract: A cylindrical golf putter provides a better feel, better club head balance and a better visual impression for the golfer so as to improve the golfer's chances of making a successful putt. The putter shaft is inserted through the center of mass of the club head and extends nearly to the bottom side surface of the club head. The club head has a toe end and a heel end which are provided with cavities within which inserts of varying length and weight may be inserted. Sight line grooves are provided on the club head to promote visual alignment of the club head with the ball and target hole. The sight line grooves may be painted with highly contrasting paint to enhance the visual impression.

Abstract: A golf club head having a body including a striking surface and a lower portion which couples with one of a plurality of flanges adapted to be fastened to the lower portion of the body. Each flange is configured to have a lower ground engaging surface defining a predetermined bounce angle such that replacing one of the plurality of flanges alters the bounce angle of the head. Preferably, the flange includes a plurality of cavities for receiving interchangeable weights for altering the weight characteristics of the club head.

Abstract: A golf club, the body of the club head is constructed from a first material and has a center of gravity and is adapted to receive a weight member, at least one weight member constructed from a second material having a density greater than that of the first material, the weight member having a center of gravity and is securely received in the club head body in a manner so that the center of gravity of the weight member is positioned below the center of gravity of the club head body.

Abstract: It is described a golf club head comprising a front face (3) or striking face, a bottom face (2) and a top face, said golf club head is provided with one or more movable screws or weights (7) for adjustment of the club heads balance. The weights or screws (7) are made of a material with a relatively high specific gravity, and are provided in tube sleeves (1) inside the club head. The screw (7) can be adjusted to any desired position between the ends of the tube sleeves (1) and thereby adjust the balance point of the club head. The tube sleeves (1) are provided slanting from the front face (3) of the club head down towards the rear part of the bottom face (2) of the club head.

Abstract: A golf putter comprising a shaft having a handle end and an at least partially threaded putter head end wherein the handle end and the putter head end of the shaft are at a shaft angle from about 10 degrees to about 20 degrees to one another, a putter head of a first density having a ball striking side, a rear side, two ends, two upwardly extending ears each having at least one golf ball guide receiving slot, a top surface, a bottom surface, a top half and a bottom half wherein the ball striking side of the putter extends upward from the bottom surface at an angle of 89-86 degrees from the bottom surface thereby creating an angle that imparts top spin to a golf ball when stuck by the ball striking side of the putter head, at least one golf ball guide positioned within the golf ball guide receiving slots, at least one, a weight having a second density where the second density is greater than the first density of the putter head wherein the weight is within the channel thereby lowering the center of gravity of

Abstract: A wood-type golf club having an enlarged club head in the range of 250 to 300 cm.3 constructed of a material lighter than steel to maintain the total club head weight within normal limits including the weight of novel power shaft according to the present invention. The club head, without the power shaft, is approximately 175 gms. and the power shaft weighs approximately 25 gms., so the total club head weight is approximately 200 gms. and within normal limits. The power shaft, integral with the rear of the ball striking face wall at its forward end and integral or cast into the rear of the club head at its rear end, while reinforcing the ball striking face wall, increases the resonant frequency of the face wall to synchronize face wall rebound to the player's swing speed. Face wall resonant frequency is varied by changing the size and weight of the power shaft.