Patent application number | Description | Published |
20080248896 | Golf club head - A golf club head comprises a face portion having a front face defining the club face and a rear face facing a hollow, wherein the face portion is provided on the rear face with an upper rib, a lower rib, a toe-side groove and a heel-side groove which extend radially from a thickest central region, so as to form a toe-side upper region, a toe-side lower region, a heel-side upper region and a heel-side lower region. The thickness distribution of the face portion satisfies the following magnitude relations: (Central region>=upper rib); (central region>=Lower rib); (upper rib>Toe-side upper region>Toe-side groove); (Lower rib>Toe-side lower region>Toe-side groove); (upper rib>Heel-side upper region>Heel-side groove); and (Lower rib>Heel-side lower region>Heel-side groove). | 10-09-2008 |
20090005190 | Wood-type golf club head - A wood-type golf club head has a hollow structure having a specific configuration in which, in order to make it easier to rotate the club head around the clubshaft during swing while maintaining a large lateral moment of inertia, the relative positions of the club face, the center of gravity, the clubshaft center line and the heel are optimized by limiting the face progression within a range between 21 to 27 mm, and the area ratio (S | 01-01-2009 |
20090075752 | Golf club head - A hollow golf club head has a head volume of not less than 430 cc, a lateral moment of inertia of from 5000 to 5900 g sq·cm, and a club head thickness of from 45 to 58 mm. | 03-19-2009 |
20090118032 | Wood-type golf club head - A wood-type golf club head has a hollow structure comprising a face portion having a back surface and a front surface defining a club face for striking a ball, a crown portion, a sole portion, and a side portion between the crown portion and sole portion. The hollow structure is provided with a hollow and a solid part. The solid part extends forward from the backmost point of the club head by a distance of from 0.08 to 0.20 times the maximum size of the club head in the back-and-forth direction, the hollow extends between the front surface of the solid part and the back surface of the face portion. The main frame of the hollow structure integrally includes the solid part. | 05-07-2009 |
20090253533 | GOLF CLUB HEAD - A golf club head is provided with a face portion comprising: a central thick part having a thickness Tc; a crown-side thick part having a thicknesses Tr; a sole-side thick part having a thicknesses Tr; a toe-side thinner part having a thickness TT; and a heel-side thinner part having a thickness TH, wherein: (1) Tc>=Tr>TT and (2) Tr>TH are satisfied; and the centroid of the central thick part is positioned on the toe-side of an extension of a widthwise center line of the crown-side thick part towards the sole and further positioned on the heel-side of an extension of a widthwise center line of the sole-side thick part towards the crown. | 10-08-2009 |
20090275425 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing a golf club head having a hollow structure composed of a main body-member and a metal face member welded thereto, comprises the steps of: (a) preparing a rolled material having a constant thickness; (b) cutting out a face member part or blank from the rolled material; (c) making the face member by forming the turnback through press working on the face member part; and (d) reducing the thickness of a corresponding-to-turnback region by machining prior to the step (c), wherein the corresponding-to-turnback region is a region of the cutout face member part corresponding to the turnback, or a region of the rolled material corresponding to the turnback. | 11-05-2009 |
20090280926 | GOLF CLUB HEAD - A golf club head has a hollow structure comprising a face member and a main member. The face member is made of a first titanium alloy having a specific gravity G | 11-12-2009 |
20090291775 | WOOD-TYPE GOLF CLUB HEAD - A wood-type hollow golf club head has a lateral moment of inertia Ma and a vertical moment of inertia Mb which has a ratio (Mb/Ma) of not less than 0.80. The head can be provided with a hollow structure divided in the front-back direction of the head into a front member, a rear member and a middle member therebetween, wherein the middle member has a specific gravity smaller than those of the front member and rear member. | 11-26-2009 |
20090305815 | IRON-TYPE GOLF CLUB HEAD - An iron-type golf club head 1 having excellent durability and weight distribution design and comprising a metallic head body | 12-10-2009 |
20100154196 | METHOD FOR MANUFACTURING GOLF CLUB HEAD - A method for manufacturing a golf club head composed of a metal main body and a non-flat metal face member which are welded each other is disclosed. In order to make the non-flat metal face member, an in-process face material is cut out from a rolled metal plate having a constant thickness. And a turnback is formed around the in-process face material by press working. Before making the press working, the region of the in-process face material corresponding to the turnback is decreased in the thickness by a cutting work. | 06-24-2010 |
20100304888 | GOLF CLUB HEAD - A hollow golf club head is disclosed, wherein a front member including a face portion and a hosel portion of the club head is made of a material having a specific gravity ρ | 12-02-2010 |
20100317460 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A golf club head having a club face for hitting a ball comprises a hollow main body provided with a front opening, and a face member disposed at the front of the main body so that a front surface thereof forms at least a major part of the club face, and a rear surface thereof faces a hollow of the main body. The peripheral edge of the face member is welded to the main body so as to form a weld bead, and the width of the weld bead is changed so that a difference (wmax-wmin) between the maximum width wmax and minimum width wmin is not less than 1 mm. | 12-16-2010 |
20110152001 | GOLF CLUB HEAD - 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 L | 06-23-2011 |
20110312439 | GOLF CLUB HEAD - A golf club head | 12-22-2011 |
20120125073 | METHOD FOR PRODUCING GOLF CLUB HEAD - A golf club head has a hollow structure comprising a head main body provided with a opening and a cover covering the opening. The head main body is made of a metal material and provided in the opening with a supporting part for supporting a peripheral edge part of the cover fitted in the opening. The cover is made of a low specific gravity material. A method for producing the golf club head comprises a step of preparing a first workpiece having an opening, which step comprises forming the supporting part through a press working of a sheet metal having a uniform thickness. | 05-24-2012 |
20120129627 | GOLF CLUB HEAD - A golf club head comprises has an inner surface including a back surface of the face portion that is provided with a crown-side thick-walled rib and a sole-side thick-walled rib. The crown-side thick-walled rib includes an upper face rib disposed in the face portion and extending from the central thick-walled part to a peripheral edge of the back surface of the face portion on a crown portion side, and a crown rib disposed in the crown portion and extending backwardly of the head from the upper face rib. The sole-side thick-walled rib includes a lower face rib disposed in the face portion and extending from the central thick-walled part to a peripheral edge of the back surface of the face portion on a sole portion side, and a sole rib disposed in the sole portion and extending backwardly of the head from the lower face rib. | 05-24-2012 |
20130053173 | GOLF CLUB HEAD | 02-28-2013 |