Patent application number | Description | Published |
20080227565 | Golf Club Head and Golf Club - This invention provides a wood golf club head having a loft angle of not more than 15°. In this golf club head, a progression length FP from a leading edge of a face to an axis line of a shaft axis and a horizontal length VZG from the leading edge of the face to a center of gravity of the head in a depth direction satisfy the following expression; −209-18-2008 | |
20090029797 | METHOD OF MANUFACTURING GOLF CLUB HEAD AND GOLF CLUB HEAD - According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming flat surfaces inclined with respect to the face by cutting into the edges of the grooves formed in the first forming step. | 01-29-2009 |
20090036228 | METHOD OF MANUFACTURING GOLF CLUB HEAD AND GOLF CLUB HEAD - According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming, uniformly along the longitudinal direction of the grooves by cutting into the edges of the grooves formed in the first forming step, notches having an arcuate cross-sectional shape. | 02-05-2009 |
20090082129 | Method of Manufacturing Golf Club Head and Golf Club Head - According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming notches uniformly along the longitudinal direction of the grooves by cutting into the edges of the grooves formed in the first forming step, the notches having first side surfaces leading to the face and second side surfaces leading to the first side surfaces and side surfaces of the grooves. | 03-26-2009 |
20090143165 | GOLF CLUB HEAD - This invention provides a golf club head including a plurality of score lines on a face. In the golf club head according to this invention, the angle between each side surface of the score lines and the face is 48° or more. Edges of the score lines are formed to be positioned within a second virtual circle with a radius of 0.011 inches, the second virtual circle being concentric with a first virtual circle which internally touches the side surface of the score line and the face with a radius of 0.010 inches. | 06-04-2009 |
20090143166 | Golf Club Head - This invention provides a golf club head including a plurality of score lines on a face. In the golf club head according to this invention, the angle between each side surface of the score lines and the face is 48° or more. Edges of the score lines are formed to be positioned within a second virtual circle with a radius of 0.011 inches, the second virtual circle being concentric with a first virtual circle which internally touches the side surface of the score line and the face with a radius of 0.010 inches. | 06-04-2009 |
20090197700 | Golf Club Head - This invention provides a golf club head including a plurality of score lines on the face. In the golf club head according to this invention, the score line includes a pair of side surfaces and a bottom portion having a protruding portion protruding toward the face. An angle between the side surface and the face is not less than 60 degrees. A cross-sectional area A (inch | 08-06-2009 |
20090221383 | Wood Club Head - A wood club head having a loft angle of not less than 13° is provided. The hosel length is not less than 20 mm. The face progression is set to fall within a range of 12 mm to 16 mm (both exclusive). The barycenter depth is set to fall within a range of 20 mm to 25 mm (both exclusive). | 09-03-2009 |
20090247318 | Golf Club Head - This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. The cross-sectional shape of each of the striations is a triangle asymmetric with regard to a virtual center line in the width direction, and the smallest interior angle among three interior angles of the triangle is placed at the sole side of the golf club head. A depth D from the face to the deepest portion of each of the striation satisfies 10 μm≦D≦40 μm. | 10-01-2009 |
20090247320 | GOLF CLUB HEAD - A golf head club has a high moment of inertia and thus produces a pleasing hitting sound. A metallic golf club head | 10-01-2009 |
20090312116 | GOLF CLUB HEAD - A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and a plurality of striations formed on the face. The angle formed by an arrangement direction of the plurality of striations and the score line grooves is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of the score line grooves. | 12-17-2009 |
20100035703 | PUTTER HEAD - A putter head prevents a ball from sliding over a green while maintaining golfers' preferred hitting feel and roll of the ball. A face insert fitted in a face of the putter head has an outer layer which serves as a ball-hitting surface and an inner layer which is located on an inner side of a head body. A smash factor of a second polymer material forming the inner layer is greater than a smash factor of a first polymer material forming the outer layer. Two types of groove, grooves of a first groove group and grooves of a second groove group are formed in an external surface of the outer layer. The grooves of the first groove group may be 0.25 to 1.6 mm wide and 0.05 to 0.5 mm deep and the grooves of the second groove group may be 0.075 to 0.5 mm wide and 0.025 to 0.1 mm deep. | 02-11-2010 |
20100048324 | GOLF CLUB HEAD - There is provided a golf club head that produces a loud hitting sound satisfying the golfer even if the volume of the golf club head having a hollow structure is increased to at least about 400 cc. A golf club head | 02-25-2010 |
20100056295 | GOLF CLUB HEAD - A golf club head according to the present invention comprises a plurality of score lines on a face, and a stair-shaped portion comprising a plurality of steps formed on a side wall of the score line from a face side end of the side wall in a depth direction of the score line. | 03-04-2010 |
20100087270 | GOLF CLUB HEAD - This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. A depth Dp of each striation satisfies 10 μm≦Dp≦40 μm. A cross-sectional shape of each striation is an isosceles trapezoid having an upper base at the face side and a lower base at the back side of the golf club head. The upper base and lower base satisfy the upper base>the lower base. A width Pb of the bottom portion of each protrusion formed between the striations and a width Wb of the lower base satisfy Pb04-08-2010 | |
20100160074 | GOLF CLUB HEAD - A golf club head having a hollow construction produces a characteristic low ball hitting sound to accommodate the diversity of golfers' preferences for ball hitting sounds even if the volume of the golf club head is increased to 430 to 500 cc and the weight thereof is decreased to 160 to 220 g. In a golf club head having a hollow construction and including a face part, a sole part, a crown part, and a side part, in which the head volume is 430 to 500 cc, and the head weight is 160 to 220 g, the area of the sole part is increased so that the primary natural frequency of the sole part is 2400 Hz or less, and a weight is formed at a position of the center of vibration in the sole part on the inner surface on the hollow construction side of the sole part. | 06-24-2010 |
20100261544 | Golf Club Head - This invention provides a golf club head comprising a plurality of score lines formed in its face. Letting θ be the angle of the side wall of the scoreline with respect to the face, Cp be the center point of a virtual circle which has a radius of 0.254 mm and is inscribed in both the side wall and the face, F be the point of contact between the virtual circle and the face, G be the point of contact between the virtual circle and the side wall, P be a point farthest from the center point Cp in the segment from the point of contact F to the point of contact G in the edge portion of the scoreline, and D (mm) be the length from the center point Cp to the point P, the golf club head satisfies 56°≦θ≦80° and 0.270≦D≦0.287. | 10-14-2010 |
20100261545 | GOLF CLUB HEAD - A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and a plurality of striations formed on the face. The angle formed by an arrangement direction of the plurality of striations and the score line grooves is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of the score line grooves. | 10-14-2010 |
20100261549 | Golf club head - A golf head club has a high moment of inertia and thus produces a pleasing hitting sound. A metallic golf club head | 10-14-2010 |
20100317459 | GOLF CLUB HEAD - This invention provides a golf club head comprising a plurality of scorelines formed in its face. The golf club head is configured such that an angle θ of the side wall of the scoreline with respect to the face is 70° or less, the edge of the scoreline has a ridged portion projecting from the face, and a height H of the ridged portion from the face satisfies: | 12-16-2010 |
20110014995 | GOLF CLUB HEAD - A golf club head according to this invention is a hollow golf club head including a face portion, a crown portion, and a sole portion. The sole portion includes a first region which starts from the boundary portion between the sole portion and the face portion, and a second region which is spaced apart from the boundary portion toward the back side, and is adjacent to the first region. The second region is thinner than the first region and a third region adjacent to the back-side periphery of the second region. The second region includes the position of an antinode of the primary vibration mode of the sole portion at the time of impact. | 01-20-2011 |
20110151998 | GOLF CLUB HEAD AND METHOD OF MANUFACTURING THE SAME - A golf club head according to this invention has scorelines formed in its face surface. A first plated layer is formed on at least the face surface of a head base body before the scorelines are formed in the face surface, the face surface is grooved to form the scorelines in it, and a second plated layer is formed on the face surface. | 06-23-2011 |
20110151999 | GOLF CLUB HEAD AND METHOD OF MANUFACTURING THE SAME - A golf club head according to this invention has scorelines formed in its face surface. A plated layer is formed on at least the face surface of a head base body before the scorelines are formed in the face surface, and the face surface is grooved to form the scorelines in it. | 06-23-2011 |
20110152002 | METHOD OF MANUFACTURING GOLF CLUB HEAD, GOLF CLUB HEAD, AND HEAD BASE BODY - This invention provides a method of manufacturing a golf club head by processing a head base body having a face base surface which becomes a face surface by finishing. The head base body includes a main body portion having the face base surface, and projecting portions which project from the main body portion. The method includes a finishing step of performing the finishing while the head base body is fixed in position by supporting the projecting portions, and a separation step of separating the projecting portions after the finishing. | 06-23-2011 |
20110152004 | GOLF CLUB HEAD - A golf club head includes: a face portion; a sole portion; a side portion; a crown portion defining a hollow portion with the face portion, the sole portion and the side portion; a hosel portion; an adhesive material provided on an inner surface of the hollow portion; and a protruding portion for dividing an arrangement area of the adhesive material, the protruding portion being provided on the sole portion. | 06-23-2011 |
20110269567 | GOLF CLUB HEAD - This invention provides a golf club head in which a plurality of scorelines are formed in its face surface. The golf club head includes a first fine groove formed in the face surface to extend parallel to the scorelines, and a second fine groove formed in the face surface to intersect with the first fine groove. | 11-03-2011 |
20110269568 | GOLF CLUB HEAD - This invention provides a golf club head in which a plurality of scorelines are formed in its face surface at an equal pitch. Rounded portions are formed on the edges of the scorelines. Each region between adjacent scorelines includes a fine groove formation region in which N (N≧2) fine grooves are formed to extend parallel to the scorelines and to align themselves in a direction perpendicular to the scorelines at an interval d (d≧0). Letting S be the distance between the endpoints of the rounded portions of the adjacent scorelines, Wt be the sum total of the widths of all the fine grooves, A1 be the distance from the endpoint of the rounded portion of one scoreline of the adjacent scorelines to the fine groove formation region, A2 be the distance from the endpoint of the rounded portion of the other scoreline of the adjacent scorelines to the fine groove formation region, and Wmax be the maximum width of the widths of the fine grooves, 0≦A1+A211-03-2011 | |
20110294596 | GOLF CLUB HEAD PROCESSING METHOD AND GOLF CLUB HEAD - This invention provides a golf club head processing method of performing blast processing on a face surface on which a scoreline is formed. The processing method according to this invention includes the steps of filling the scoreline with a masking material before the blast processing, and removing the masking material from the scoreline after the blast processing. | 12-01-2011 |
20110300967 | GOLF CLUB HEAD - This invention provides a golf club head including a plurality of parallel scorelines formed in its face surface, and a plurality of grooves which are formed in the face surface and have a width narrower than the scorelines. Rounded portions are formed on the edges of the scorelines. The plurality of grooves are formed at positions on the two sides of each of the scorelines to extend parallel to the scorelines. | 12-08-2011 |
20110312440 | GOLF CLUB HEAD - A hollow golf club head according to this invention includes a face portion, a crown portion, and a sole/side portion including a sole portion and a side portion. The sole/side portion includes a thin region formed to traverse at least the sole portion from the toe side to the heel side, and thick regions formed on the side of the face portion and the back side, respectively, with respect to the thin region to be adjacent to the thin region. The golf club head further includes a rib which extends from the toe side to the heel side only in the thin region of the thin region and the thick region, and is connected to the side portion on the toe side and the side portion on the heel side. | 12-22-2011 |
20110319188 | PUTTER HEAD - A putter head has a head main body and a face insert mounted on a face surface of the head main body. The face insert has a slit which is cut in from an end face on a sole or top side of the face insert toward an opposite side thereof. In one embodiment, the slit is cut in from an end face on the sole side of the face insert toward the top side thereof. The slit may be extended obliquely such that the top side of the slit is located forward of the face insert. In another embodiment, the slit is cut in from the side face on the top side of the face insert toward the sole side thereof. The slit may be extended obliquely such that the sole side of the slit is located rearward of the putter head. Any slit may be extended from the side face on a toe side of the face insert to the side face on a heel side thereof. The face inserts may contain viscoelastic material loaded in the slit. | 12-29-2011 |
20110319189 | PUTTER HEAD - A putter head includes a head main body having a depressed portion and a face insert disposed within the depressed portion so that the face insert is mounted in a face surface of the head main body. The face insert includes at least one low hardness portion and at least one high hardness portion. The face insert has a boundary face between the at least one low hardness portion and the at least one high hardness portion which is inclined relative to a back-to-forth direction of the putter head. The boundary face may decline toward the rear or may rise toward the rear. The face insert may comprise a plurality of the low hardness portions and a plurality of the high hardness portions so that the low and high hardness portions are arranged vertically in multiple layers. The sectional shapes taken perpendicularly to the back-to-forth direction of the high hardness portion and the low hardness portion may be substantially of a right triangle. The face insert may comprise a surface layer and groove portions on a front face thereof. | 12-29-2011 |
20120004049 | GOLF CLUB HEAD - A golf head club has a high moment of inertia and thus produces a pleasing hitting sound. A metallic golf club head | 01-05-2012 |
20120088599 | PUTTER HEAD - This invention provides a putter head comprising a head body and a face insert mounted on a face surface of the head body. A notched portion is provided in a rear surface of the face insert to extend upward from a lower end portion. | 04-12-2012 |
20120142450 | GOLF CLUB HEAD - This invention provides a hollow golf club head including a face portion, a crown portion, and a sole/side portion including a sole portion and a side portion. This golf club head includes a rib which extends from the toe side to the heel side in the sole portion, and a weight portion which is provided in the sole portion on the side of the face portion with respect to the rib or the back side with respect to the rib, and increases the amplitude of vibration of the sole portion. | 06-07-2012 |
20120157226 | PUTTER HEAD - This invention provides a putter head comprising a head body and a face insert mounted on a face surface of the head body. Slits are vertically aligned in multiple stages so as to extend in the face insert in a toe-to-heel direction. A depending portion is provided in the slit on a side of the face surface so as to reduce a vertical dimension of the slit. The slit is filled with a viscoelastic material. | 06-21-2012 |
20120184392 | PUTTER HEAD - A putter head includes a head main body having a recess portion in a face surface of the putter head, and a face insert disposed in the recess portion. The face insert has a slit extending upward from a bottom face thereof In the bottom face, the slit may extend from the vicinity of a toe-side end thereof to the vicinity of a heel-side end thereof A bottom end of the slit may be located on a rear edge of the face insert. A ceiling face of the slit may be in a shape of an arch from the toe side to the heel side. The slit may be filled with a viscoelastic material. | 07-19-2012 |
20120302369 | GOLF CLUB HEAD - A hollow golf club head according to this invention includes a face portion, a crown portion, and a sole portion, and is formed by connecting a plurality of shell members to each other. This golf club head includes a rib which is provided in the sole portion and used to adjust an impact sound. The plurality of shell members are divided using at least the rib as a boundary. The plurality of shell members include a rib forming shell member including a sole portion forming portion which forms part of the sole portion, and a rib forming portion which stands upright from the end of the sole portion forming portion and forms the rib. | 11-29-2012 |
20120322578 | GOLF CLUB HEAD - This invention discloses a golf club head which has a hollow shell structure and includes a face portion, a sole portion, a crown portion, a back portion, a toe-side side portion, and a heel-side side portion. A ratio R/H×100% is 5% to 20%, where R is the radius of curvature of the upper corner edge on which the face portion and the crown portion intersect with each other, and H is the maximum head height. | 12-20-2012 |
20120322580 | GOLF CLUB HEAD - A hollow golf club head according to this invention includes a face portion, a crown portion, and a sole/side portion which includes a sole portion and a side portion. This golf club head includes a rib which extends from the toe side to the heel side in the sole portion, and a weight portion which is provided in the sole portion on the back side with respect to the rib, and increases the amplitude of vibration of the sole portion. The natural frequency of the first-order vibration mode of the sole portion is 2,500 Hz or more. A mass m (g) of the weight portion satisfies 1≦m<6. The rib has a quadrangular cross-sectional shape with a width b (mm) and a height h (mm), and 0.20≦b·h | 12-20-2012 |
20130109497 | GOLF CLUB HEAD | 05-02-2013 |
20130109498 | GOLF CLUB HEAD AND METHOD OF MANUFACTURING THE SAME | 05-02-2013 |
20130130833 | GOLF CLUB HEAD - A golf club head according to this invention includes a face portion, a crown portion having a shape which bulges out upward, and a sole portion. The crown portion includes a vibration promotion region and a surrounding region which surrounds the vibration promotion region. The vibration promotion region has a circular or elliptical shape, and is flatter than the surrounding region. | 05-23-2013 |
20130281226 | FORMING METHOD AND GOLF CLUB HEAD - This invention provides a method of forming a fine groove with a width smaller than that of a scoreline in a golf club head. The method according to this invention includes a first step of forming a base groove in a face surface as a base of the fine groove, and a second step of forming a recess in at least one side wall of the base groove to reduce the angle between this side wall and the face surface. | 10-24-2013 |
20130303303 | MANUFACTURING METHOD AND GOLF CLUB HEAD - This invention provides a method of manufacturing a golf club head including a face surface. This manufacturing method includes a step of forming a plurality of recessed portions in the face surface, included in a first member, to extend in the toe-to-heel direction, a fixing step of fixing, to the recessed portions, second members which are formed by a material different from that of the first member, and fill the recessed portions, and after the fixing step, a scoreline forming step of forming at least one scoreline in each of the second members, while not forming the scoreline in a portion, between the recessed portions, of the face surface of the first member. | 11-14-2013 |
20130324296 | GOLF CLUB HEAD - This invention provides a golf club head which includes a face portion, and has a volume of 400 cc or more. When the golf club head is disposed on a horizontal plane at a specific lie angle while the face portion is matched with the flight trajectory direction, and images of the face portion and the golf club head are projected onto a vertical plane from the front side of the face portion upon defining the flight trajectory direction as the projection direction, the area of a projected figure H of the golf club head is defined as HA, and the area of a projected figure F of the face portion is defined as FA. The golf club head satisfies 0.512-05-2013 | |
20130324298 | GOLF CLUB HEAD - This invention provides a hollow golf club head including a face portion, a crown portion, a sole/side portion which includes a sole portion and a side portion, and a weight member. The golf club head includes a recessed portion which is formed in the sole/side portion, and has an outer surface to which the weight member is attached, and a rib which is formed on the inner surface of the sole/side portion, and traverses the recessed portion across the peripheral edge defining the recessed portion. | 12-05-2013 |
20130337931 | GOLF CLUB HEAD - This invention provides an iron golf club head comprising a face surface with a plurality of scorelines formed in it, and an indicating portion which indicates at least the cross-sectional shape of the scoreline. | 12-19-2013 |