公开(公告)号：JPH1066744A

公开(公告)日：1998-03-10

申请号：JP10073497

申请日：1997-03-13

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM R

IPC: A63B53/10

Abstract: PROBLEM TO BE SOLVED: To provide a shaft such that the weights of clubs, the balance between the flexibility and rigidity of the shaft, and the torsion characteristic of the shaft are uniform and match one another in one set. SOLUTION: A grip 18 is formed on the thick end 20 of the shaft 12 of a golf club 10, an a club head 22 is attached to the end 24 of the shaft 12. The shaft 12 is made of a nonmetallic material, e.g. a hardened plastic base with fibers therein, its middle part 26 being tapered. The middle part 26 includes two sections 28, 30 that taper at different inclinations. An increased diameter part 32 is formed near the inside edge of the end 24 of the shaft 12. The increased diameter part 32 is formed of a central cylindrical part 34 and transit parts 36, 38 at both ends of the cylindrical part. The cross section of either part of the increased diameter part 32 is greater in diameter than the immediately adjoining shaft 12. An axial hole is bored in the increased diameter part 32, the diameter of the hole being smaller than the diameter of the immediately adjoining shaft 12.

公开(公告)号：JPH10248977A

公开(公告)日：1998-09-22

申请号：JP10073397

申请日：1997-03-13

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM R

IPC: A63B53/12

Abstract: PROBLEM TO BE SOLVED: To make reaction as recognized by a golfer constant by taking the balance of one set of clubs to gain a harmonized stability between different inertial moment torsion of the individual clubs in the set. SOLUTION: A shaft 12 is made of steel. An intermediate section 22 thereof comprises a plurality of zones 22a-22n with the diameter thereof gradually decreasing toward the tip end 20 from a butt end 16. A bulge 24 is formed on the shaft 12 near the end of the internal side of the tip 20 thereof. Three cylindrical step faces 30, 32 and 34 are formed at one end of the central cylinder section 26 of the bulge 24 and three cylindrical step faces 36, 38 and 40 at the opposite end in the direction of the axis of the central cylinder section 26. The diameter of the central section 26 is larger than the diameter of a part immediately adjacent thereto of the shaft 12. The diameter of respective sets of three step faces at both ends of the central section 26, that is, the step faces 30, 32 and 34 at one end and the step faces 36, 38 and 40 at the other end become gradually larger than that of the parts adjacent thereto of the shaft but are smaller than the diameter of the central section 26 itself.

公开(公告)号：GB2311016B

公开(公告)日：1999-10-06

申请号：GB9705253

申请日：1997-03-13

Applicant: EMHART INC

Inventor： MCINTOSH WILLIAM ,  KITCHENS JEFFREY E

IPC: A63B53/12

Abstract: A golf club 10 includes a shaft 12 with a grip 14 assembled on a butt end 16 of the shaft. A club head 18 is mounted on a tip end 20 of the shaft 12. The shaft 12 is composed of steel and is formed with an intermediate section 22 having a plurality of sections 22a through 22n of decreasing diameter from the butt end 16 toward the tip end 20. A bulge 24 is formed in the shaft 12 near an inboard extremity of the tip end 20. The bulge 24 is formed with a central cylindrical section 26 with three cylindrical step surfaces 30, 32 and 34 at one axial end of the section 26 and three step surfaces 36, 38 and 40 at the opposite axial end of the section 26. The diameter of the central section 26 is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the diameters of each set of the three step surfaces at each end of the central section 26, that is surfaces 30, 32 and 34 at one end and surfaces 36, 38 and 40 at the other end, are successively greater than the adjacent portion of the shaft, but less than the diameter of the central section 26.

公开(公告)号：AU708496B2

公开(公告)日：1999-08-05

申请号：AU1625097

申请日：1997-03-12

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM R

IPC: A63B53/12

Abstract: A golf club 10 includes a shaft 12 with a grip 14 assembled on a butt end 16 of the shaft. A club head 18 is mounted on a tip end 20 of the shaft 12. The shaft 12 is composed of steel and is formed with an intermediate section 22 having a plurality of sections 22a through 22n of decreasing diameter from the butt end 16 toward the tip end 20. A bulge 24 is formed in the shaft 12 near an inboard extremity of the tip end 20. The bulge 24 is formed with a central cylindrical section 26 with three cylindrical step surfaces 30, 32 and 34 at one axial end of the section 26 and three step surfaces 36, 38 and 40 at the opposite axial end of the section 26. The diameter of the central section 26 is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the diameters of each set of the three step surfaces at each end of the central section 26, that is surfaces 30, 32 and 34 at one end and surfaces 36, 38 and 40 at the other end, are successively greater than the adjacent portion of the shaft, but less than the diameter of the central section 26.

公开(公告)号：GB2311016A

公开(公告)日：1997-09-17

申请号：GB9705253

申请日：1997-03-13

Applicant: EMHART INC

Inventor： MCINTOSH WILLIAM ,  KITCHENS JEFFREY E

IPC: A63B53/12

Abstract: A golf club 10 includes a shaft 12 with a grip 14 assembled on a butt end 16 of the shaft. A club head 18 is mounted on a tip end 20 of the shaft 12. The shaft 12 is composed of steel and is formed with an intermediate section 22 having a plurality of sections 22a through 22n of decreasing diameter from the butt end 16 toward the tip end 20. A bulge 24 is formed in the shaft 12 near an inboard extremity of the tip end 20. The bulge 24 is formed with a central cylindrical section 26 with three cylindrical step surfaces 30, 32 and 34 at one axial end of the section 26 and three step surfaces 36, 38 and 40 at the opposite axial end of the section 26. The diameter of the central section 26 is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the diameters of each set of the three step surfaces at each end of the central section 26, that is surfaces 30, 32 and 34 at one end and surfaces 36, 38 and 40 at the other end, are successively greater than the adjacent portion of the shaft, but less than the diameter of the central section 26.

公开(公告)号：GB2311017B

公开(公告)日：1999-10-06

申请号：GB9705266

申请日：1997-03-13

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM

IPC: A63B53/10

Abstract: A golf club 10 includes a shaft 12 with a grip 18 assembled on a butt end 20 of the shaft. A club head 22 is mounted on a tip end 24 of the shaft 12. The shaft 12 is composed of a non-metallic material, such as fibers in a cured plastic matrix, and is formed with an tapered intermediate section 26. The section 26 includes two segments 28 and 30 which taper at different taper rates. A bulge 32 is formed in the shaft 12 near an inboard extremity of the tip end 24. The bulge 32 is formed with a central cylindrical section 34 and transition sections 36 and 38 on opposite axial ends of the central section. The diameter of the bulge 32 at any cross section thereof is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the bulge 32 is formed with an axial opening 16, the diameter of which is less than the diameter of the immediately adjacent portions of the shaft 12.

公开(公告)号：AU1625597A

公开(公告)日：1997-09-18

申请号：AU1625597

申请日：1997-03-12

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM R

IPC: A63B53/10

Abstract: A golf club 10 includes a shaft 12 with a grip 18 assembled on a butt end 20 of the shaft. A club head 22 is mounted on a tip end 24 of the shaft 12. The shaft 12 is composed of a non-metallic material, such as fibers in a cured plastic matrix, and is formed with an tapered intermediate section 26. The section 26 includes two segments 28 and 30 which taper at different taper rates. A bulge 32 is formed in the shaft 12 near an inboard extremity of the tip end 24. The bulge 32 is formed with a central cylindrical section 34 and transition sections 36 and 38 on opposite axial ends of the central section. The diameter of the bulge 32 at any cross section thereof is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the bulge 32 is formed with an axial opening 16, the diameter of which is less than the diameter of the immediately adjacent portions of the shaft 12.

公开(公告)号：AU1625097A

公开(公告)日：1997-09-18

申请号：AU1625097

申请日：1997-03-12

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM R

IPC: A63B53/12

Abstract: A golf club 10 includes a shaft 12 with a grip 14 assembled on a butt end 16 of the shaft. A club head 18 is mounted on a tip end 20 of the shaft 12. The shaft 12 is composed of steel and is formed with an intermediate section 22 having a plurality of sections 22a through 22n of decreasing diameter from the butt end 16 toward the tip end 20. A bulge 24 is formed in the shaft 12 near an inboard extremity of the tip end 20. The bulge 24 is formed with a central cylindrical section 26 with three cylindrical step surfaces 30, 32 and 34 at one axial end of the section 26 and three step surfaces 36, 38 and 40 at the opposite axial end of the section 26. The diameter of the central section 26 is greater than the diameter of the immediately adjacent portions of the shaft 12. Also, the diameters of each set of the three step surfaces at each end of the central section 26, that is surfaces 30, 32 and 34 at one end and surfaces 36, 38 and 40 at the other end, are successively greater than the adjacent portion of the shaft, but less than the diameter of the central section 26.

公开(公告)号：GB2311017A

公开(公告)日：1997-09-17

申请号：GB9705266

申请日：1997-03-13

Applicant: EMHART INC

Inventor： KITCHENS JEFFREY E ,  MCINTOSH WILLIAM

IPC: A63B53/10

Abstract: A fibre-reinforced plastic golf club shaft 12 includes a bulge 32 near the inboard extremity of the tip end. The bulge is formed with a central cylindrical section 34 and transition sections 36 and 38 and has an axial opening whose diameter is less than the diameter of the immediately adjacent portions of the shaft.