Patent application number | Description | Published |
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 |
20090062027 | GOLF CLUB SHAFT SIMULATION METHOD - A computer-aided golf club shaft swing simulation method, includes: dividing a model of a shaft into a plurality of model areas continuously along its length from a proximal end to a distal end thereof; inputting values of Young's modulus, modulus of elasticity in shear and geometrical moment of inertia into the plurality of model areas or their joint portions; and analyzing a behavior of the shaft when the shaft is swung according to a given swing pattern. | 03-05-2009 |
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 |
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 |
20090305809 | GOLF CLUB SHAFT AND GOLF CLUB THEREWITH - A golf club shaft that has a flexural rigidity distribution allows a user to easily adjust swing timing even when a golf club using the golf club shaft is long. The golf club shaft comprises a section between a point 500 mm and a point 800 mm from a tip end of the shaft, wherein the flexural rigidity El of the shaft monotonically increases in the section from the point 500 mm to the point 800 mm, wherein Δ1/Δ2 is at least about 1.5 provided that the rate of change of the flexural rigidity EI of the shaft in a first subsection between a point 500 mm and a point 600 mm from the tip end is denoted by Δ1, and the rate of change of the flexural rigidity EI of the shaft in a second subsection between a point 700 mm and a point 800 mm from the tip end is denoted by Δ2, and wherein the flexural rigidity EI of the shaft at a point 750 mm from the tip end is at least about 4.1×10 | 12-10-2009 |
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 |
20100056292 | GOLF CLUB AND SHAFT REPLACING METHOD - According to an aspect of the invention, a golf club includes: a head having a hosel; a shaft; a shaft case fixed to one end of the shaft, and configured to be inserted into the hosel, the shaft case being formed in a substantially cylindrical shape; and a ring-shaped screw member configured to be screwed into one end of the hosel to fix the shaft case in the hosel, and to be fitted with an outer face of an one end of the shaft case, the ring-shaped screw member being noncontact with the shaft. | 03-04-2010 |
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 | |
20100144459 | GOLF CLUB AND METHOD FOR ADJUSTING PROPERTIES THEREOF - According to one aspect of the invention, a golf club includes: a head having a hosel having a hosel hole; a shaft; a shaft case having a shaft insertion hole to which one end of the shaft is inserted and configured to be inserted to the hosel hole; and a ring-shaped screw member configured to be screwed into one end of the hosel to fix the shaft case in the hosel hole, and to be fitted with an outer face of an one end of the shaft case so as not to contact with the shaft directly, wherein an axis of the shaft insertion hole is nonparallel to an axis of the hosel hole, and an inner face of the hosel hole and an outer face of the shaft case includes a triangular or more polygonal cross-sectional face that is perpendicular to the axis of the hosel hole. | 06-10-2010 |
20100167833 | SHAFT SET FOR GOLF CLUBS AND CLUB SET INCLUDING THE SAME - A shaft set includes plural shafts used for wood-type golf clubs each having a length of 40 inches to 48 inches. Among the plural shafts, a shaft used for a longer club has a smaller amount of change Δ1 in bending stiffness in a section from 600 mm to 800 mm from a tip of the shaft. Among the clubs using the plural shafts, the amount of change Δ1 in bending stiffness decreases at a constant rate in a range of 0.7×10 | 07-01-2010 |
20100234123 | GOLF CLUB, METHOD FOR CHANGING SHAFT INSERTION DEPTH OF GOLF CLUB, AND METHOD FOR REPLACING SHAFT OF GOLF CLUB - A golf club, includes: a head; a shaft; a shaft case, having a cylindrical shape and fixed to a leading end of the shaft, a hosel, mounted on the head, wherein: the shaft case is inserted into the hosel from an upper end of the hosel; and the shaft case is fixed to the hosel so that an insertion depth of the shaft into the hosel is changed. | 09-16-2010 |
20100317454 | GOLF CLUB, HEAD OF GOLF CLUB AND METHOD FOR ADJUSTING PROPERTIES OF GOLF CLUB - A golf club head with a leading end of a shaft mountable thereon, the golf club head includes: a head main body, formed with a hosel insertion hole; a hosel, formed with a shaft case insertion hole and removably mounted in the hosel insertion hole; and a shaft case, formed with a shaft insertion hole and removably mounted in the shaft case insertion hole. | 12-16-2010 |
20100323808 | GOLF CLUB, HEAD OF GOLF CLUB AND METHOD FOR ADJUSTING PROPERTY OF GOLF CLUB - A golf club includes: a head, formed with a hosel insertion hole, including: a female screw, formed in an inner peripheral surface of the entrance portion of the hosel insertion hole; a hosel, formed with a shaft case insertion hole and mounted on a deep portion of the hosel insertion hole; a shaft case, formed with a shaft insertion hole, a leading end portion of the shaft case being mounted into the shaft case insertion hole; a ring holder, fitted with an outer surface of the shaft case; a screw member, fitted with an outer surface of the ring holder in a peripheral direction of the ring holder; and a male screw, formed on an outer peripheral surface of the screw member so that the screw member is engaged with the female screw; and a shaft, inserted into the shaft insertion hole of the head. | 12-23-2010 |
20100331101 | GOLF CLUB HEAD - 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. | 12-30-2010 |
20110118044 | GOLF CLUB HEAD AND GOLF CLUB - A golf club head includes: a head main body having a shaft holder inserting hole; a shaft holder which has a shaft inserting hole and is attachably and detachably installed in the shaft holder inserting hole; a bolt inserting hole which penetrates from a sole side of the head main body to the shaft holder inserting hole; and a bolt which is inserted into the bolt inserting hole, screwed into the shaft holder, and fixes the shaft holder to the head main body, an axis center of the shaft inserting hole and an axis center of the shaft holder inserting hole being non-coaxial shapes, wherein a lower end side of the shaft holder and an inner portion of the shaft holder inserting hole are polygonal sectional shape portions and are engaged with each other. | 05-19-2011 |
20110118045 | GOLF CLUB HEAD AND GOLF CLUB - A golf club head includes: a head main body formed with a hosel column inserting hole; a hosel column which is formed with a shaft inserting hole and is installed on the hosel column inserting hole; a bolt inserting hole penetrating from a sole side of the head main body to the hosel column inserting hole; and a bolt which is inserted into the bolt inserting hole and is screwed into the hosel column, wherein: the hosel column includes a trunk portion provided with a shaft inserting hole, and a leg portion which protrudes from a lower end surface of the trunk portion and is inserted into the hosel column inserting hole; and at least a lower end side of the leg portion and an inner portion of the hosel column inserting hole are polygonal sectional shape portions and are engaged with each other. | 05-19-2011 |
20110159978 | SHAFT SELECTION ASSIST APPARATUS - A shaft selection assist apparatus according to this invention includes a storage means for storing recommended shaft information indicating a correspondence between measurement parameters obtained upon a test strike with a golf club to which a predetermined reference shaft is attached, and recommended shafts among shafts of a plurality of types, an acquisition means for acquiring the measurement results of the measurement parameters associated with a test strike actually made by a user with the golf club, a selection means for selecting a recommended shaft by referring to the recommended shaft information based on the measurement results acquired by the acquisition means, and an output means for outputting information indicating the recommended shaft selected by the selection means. The recommended shaft information stored in the storage means is information which specifies recommended shafts based on the relationship between the shaft rigidity distribution and the measurement parameters. | 06-30-2011 |
20110159979 | SHAFT SELECTION ASSIST APPARATUS - A shaft selection assist apparatus according to this invention includes a storage means for storing recommended shaft information indicating a correspondence between measurement parameters obtained upon a test strike with a golf club to which a predetermined reference shaft is attached, and recommended shafts among shafts of a plurality of types, an acquisition means for acquiring the measurement results of the measurement parameters associated with a test strike actually made by a user with the golf club, a selection means for selecting a recommended shaft by referring to the recommended shaft information based on the measurement results acquired by the acquisition means, and an output means for outputting information indicating the recommended shaft selected by the selection means. The measurement parameters include the vertical launch angle of a struck ball and the back spin amount on the struck ball. The recommended shaft information stored in the storage means is information which specifies recommended shafts based on the relationship between the shaft rigidity distribution, and the vertical launch angle and the back spin amount. | 06-30-2011 |
20110172025 | GOLF CLUB SHAFT AND GOLF CLUB - A golf club shaft includes an outer shaft and an inner shaft disposed in a hollow portion of the outer shaft. A void portion is formed between the outer shaft and the inner shaft. The golf club shaft has a double structure including the outer shaft and the inner shaft. This allows both of the shafts to integrally operate and also allows one of the shafts to primarily operate. | 07-14-2011 |
20110232062 | GOLF CLUB AND SHAFT REPLACING METHOD - According to an aspect of the invention, a golf club includes: a golf club head having a hosel; a shaft; a shaft case fixed to one end of the shaft, and inserted into the hosel, the shaft case being formed in a substantially cylindrical shape; and a ring-shaped screw member screwed into one end of the hosel to fix the shaft case in the hosel, the ring-shaped screw member being detachable from the hosel; | 09-29-2011 |
20110250984 | GOLF CLUB AND METHOD OF ADJUSTING PROPERTIES THEREOF - A golf club includes: a hosel of a head to which a leading end of a shaft is attached; a weight material for adjusting weight being provided in a lower end portion of a hosel hole; and a communication opening which communicates the lower end portion of the hosel hole with an inside of the head, wherein the weight material is detachably screwed into the communication opening. | 10-13-2011 |
20110256952 | GOLF CLUB, SHAFT REPLACING METHOD AND HEAD REPLACING METHOD - A method for replacing a shaft of a golf club, the golf club including: a head having a hosel; the shaft; a shaft case fixed to one end of the shaft, and configured to be inserted into the hosel; and a ring-shaped screw member configured to be screwed into one end of the hosel to fix the shaft case in the hosel, and to be fitted with an outer face of an one end of the shaft case, the ring-shaped screw member being noncontact with the shaft, the method comprising: fixing a newly-provided shaft to a newly-provided shaft case corresponding to the hosel; unscrewing the ring-shaped screw member from the hosel; removing the shaft case with the shaft from the hosel; inserting the newly-provided shaft case with the newly-provided shaft to the hosel; and screwing the ring shaped screw member on the hosel. | 10-20-2011 |
20110263348 | GOLF CLUB - A golf club includes: a shaft case being inserted into a hosel from the upper end side of a hosel hole in a head; an extending member with a lower end side which is screwed into the upper end side of the hosel hole, into which the screw member is screwed; and a pair of attachments which is fit onto the shaft and interposed between an upper end surface of the shaft case and a lower end surface of the screw member and each of which has a half-split cylindrical shape, wherein: the shaft case is fixed to the hosel hole by the screw member pressing the shaft via the attachments; and the shaft case is fixable to the hosel hole by removing the extending member and the attachments and screwing the screw member onto the upper end side of the hosel hole. | 10-27-2011 |
20110287853 | GOLF CLUB - A golf club includes: a shaft; a head including a hosel formed with a hosel hole; a shaft case with a substantially tube shape being bonded to a leading end of the shaft, the shaft case being inserted into the hosel hole, the shaft case being fixed to the hosel by a ring-shaped screw member fitted onto an upper portion of the shaft case and detachably screwed into a female screw in an inner circumferential surface of the hosel hole, wherein an outer side surface of a lower side part of the shaft case and a lower side part of the hosel hole have non-circular cross-section shapes. | 11-24-2011 |
20120064997 | CLUBHEAD OF IRON GOLF CLUB - A clubhead of an iron golf club includes: a head main body including a face portion and a hosel portion; a back member including a sole surface and a back surface; and a fixing member configured to detachably fix the back member to the head main body. | 03-15-2012 |
20120083357 | GOLF CLUB SHAFT AND GOLF CLUB THEREWITH - A golf club shaft has a length of a shaft of 1050 mm to 1170 mm and a sum of flexural rigidities at positions 150 mm, 200 mm and 250 mm from a front end of the shaft of A | 04-05-2012 |
20120190474 | GOLF CLUB, SHAFT INSERTION DEPTH CHANGING METHOD AND SHAFT REPLACING METHOD - A golf club includes: a shaft; a head mounted on a leading end of the shaft; and a substantially cylindrical shaft case fixed to the leading end of the shaft, wherein: the shaft case is inserted into a hosel of the head; the shaft case is fixed to the head by a bolt inserted from a sole side of the head; and a spacer is interposed between an upper end of the hosel and a flange portion formed in an upper portion of the shaft case or is removed therefrom to change an insertion depth of the shaft case into the hosel. | 07-26-2012 |
20120208653 | GOLF CLUB AND METHOD FOR ADJUSTING CHARACTERISTICS OF GOLF CLUB - A golf club includes: a shaft; a head mounted on a leading end of the shaft; and a substantially cylindrical shaft case fixed to the leading end of the shaft, wherein: the shaft case is inserted into the tubular portion of the hosel of the head; the tubular portion includes a partition plate section in the lower portion thereof; a spacer is interposed between the leading end of the shaft case and partition plate section; the shaft case is unrotatably engaged with the spacer; the spacer and partition plate section respectively include stopper portions for preventing the rotation of the spacer; and a bolt inserted through bolt insertion holes respectively formed in the partition plate section and spacer from the sole side of the head is screwed into the shaft case, whereby the shaft case is fixed to the head. | 08-16-2012 |
20120214617 | GOLF CLUB AND METHOD FOR ADJUSTING PROPERTIES THEREOF - A golf club is provided which includes: a head having a hosel having a hosel hole; a shaft; a shaft case having a shaft insertion hole to which one end of the shaft is inserted and configured to be inserted to the hosel hole; and a ring-shaped screw member configured to be screwed into one end of the hosel to fix the shaft case in the hosel hole, and to be fitted with an outer face of an one end of the shaft case so as not to contact with the shaft directly, wherein an axis of the shaft insertion hole is nonparallel to an axis of the hosel hole, and an inner face of the hosel hole and an outer face of the shaft case includes a triangular or more polygonal cross-sectional face that is perpendicular to the axis of the hosel hole. | 08-23-2012 |
20120283044 | GOLF CLUB, HEAD OF GOLF CLUB AND METHOD FOR ADJUSTING PROPERTIES OF GOLF CLUB - A golf club head with a leading end of a shaft mountable thereon, the golf club head includes: a head main body, formed with a hosel insertion hole; a hosel, formed with a shaft case insertion hole and removably mounted in the hosel insertion hole; and a shaft case, formed with a shaft insertion hole and removably mounted in the shaft case insertion hole. | 11-08-2012 |
20130123039 | GOLF CLUB - A golf club includes a shaft and a head, the torque of the entire length of the shaft being in a range of 3 to 5°. From viewpoints of a torsional rigidity distribution of the shaft, an integrated value of the torsional rigidity on the grip end side of the shaft is 85% or less of the integrated value of the torsional rigidity of the entire length of the shaft. The head has a distance to the center of gravity of 40 to 48 mm and a gravity center angle of 22 to 30°. | 05-16-2013 |
20130143688 | GOLF CLUB SHAFT - A golf club shaft has the bending rigidity distribution and the torsional rigidity distribution satisfying the following three relational formulas: 1) S | 06-06-2013 |
20130260910 | GOLF CLUB - A golf club includes a shaft and a head. The shaft has a torque of the entire length of the shaft of from 3 to 5°. In the torsional rigidity distribution of the shaft, an integrated value of the torsional rigidity on the grip end side of the shaft is at least 85% of the integrated value of the torsional rigidity of the entire length of the shaft. The head has a distance to the center of gravity of from 25 mm to 35 mm and has a gravity center angle of from 10° to 20°. | 10-03-2013 |
20140051527 | GOLF CLUB, SHAFT INSERTION DEPTH CHANGING METHOD AND SHAFT REPLACING METHOD - A golf club includes: a shaft; a head mounted on the leading end of the shaft; and a shaft case having a substantially cylindrical shape and fixed to the leading end of the shaft and inserted into a hosel formed in the head, the shaft case being fixed to the head by a bolt inserted from the sole side of the head, wherein the shaft case includes a small-diameter cylindrical portion on the leading end side thereof and a key portion formed on the outer peripheral surface of the small-diameter cylindrical portion, and multiple slits having different depths and engageable with the key portion are formed in the deep portion of the inside of the hosel, whereby, by changing the slits engageable with the key portion, the insertion depth of the shaft case into the hosel can be changed. | 02-20-2014 |
20140162806 | GOLF CLUB AND METHOD FOR ADJUSTING CHARACTERISTICS OF THE SAME - A golf club includes: a shaft; a head; and a shaft case, and a hosel column wherein: a threaded ring including a plurality of threads provided on an inner periphery of an inner hole of the threaded ring is provided on an upper side of a dividing member, the threads extending in an axis center direction of the inner hole; the shaft case includes a convex axis member provided at a top end of the shaft case; the convex axis member is inserted in the inner hole of the threaded ring, and any one of corner edges of the convex axis member and the convex threads connect with the threads of the threaded ring; and a bolt that is inserted into a bolt insertion hole provided to the dividing member from a sole side of the head is screwed into the shaft case. | 06-12-2014 |