Golf club and shaft therefor
First Claim
1. A golf club shaft, which comprises:
- a metallic body extending longitudinally along an axis thereof;
the body formed with a butt end formed at one end thereof having an inboard extremity of a prescribed diameter and an outboard extremity;
the body formed with a tip end formed at an end thereof axially opposite the butt end and spaced axially therefrom and having an inboard extremity of a diameter less than the prescribed diameter and an outboard extremity;
the body formed with an intermediate section which extends from the inboard extremity of the butt end toward the tip end wherein the diameter of an end of the intermediate section which joins the butt end is the same as the prescribed diameter and the diameter of an opposite end of the intermediate section is less than the prescribed diameter;
a bulge formed in the body along the axis thereof; and
the bulge formed with radially-outward-extending axially-spaced stepped portions joined with opposite ends of a central shell-like portion between the stepped portions said central shell-like portion extending radially from the axis of the body by a distance which is greater than the diameter of at least the stepped portions immediately adjacent the opposite ends of the central shell-like portion.
20 Assignments
0 Petitions
Accused Products
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.
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Citations
22 Claims
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1. A golf club shaft, which comprises:
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a metallic body extending longitudinally along an axis thereof; the body formed with a butt end formed at one end thereof having an inboard extremity of a prescribed diameter and an outboard extremity; the body formed with a tip end formed at an end thereof axially opposite the butt end and spaced axially therefrom and having an inboard extremity of a diameter less than the prescribed diameter and an outboard extremity; the body formed with an intermediate section which extends from the inboard extremity of the butt end toward the tip end wherein the diameter of an end of the intermediate section which joins the butt end is the same as the prescribed diameter and the diameter of an opposite end of the intermediate section is less than the prescribed diameter; a bulge formed in the body along the axis thereof; and the bulge formed with radially-outward-extending axially-spaced stepped portions joined with opposite ends of a central shell-like portion between the stepped portions said central shell-like portion extending radially from the axis of the body by a distance which is greater than the diameter of at least the stepped portions immediately adjacent the opposite ends of the central shell-like portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A golf club shaft, which comprises:
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a metallic tube; a butt end at one end of the tube and a tip end at another end of the tube spaced axially therefrom; at least a portion of the tube between the butt and tip ends thereof being formed with a first end diameter at a first end thereof which is closer to the butt end and a second end diameter at a second end thereof with a diameter smaller than the first diameter and closer to the tip end; a section of the tube extends between the first end and the second end of the portion and is formed with successively smaller diameters from the first end to the second end within a range of diameters between the first end diameter and the second end diameter; a bulge formed in the tube between the second end of the portion and the tip end; the bulge formed with a central cylindrical section of a prescribed axial length and a prescribed diameter greater than the second end diameter; the bulge further formed with a pair of first step surfaces with a respective one of the first step surfaces joined to each end of the central section and having a first step diameter which is less than the central section diameter and greater than the second end diameter; the bulge further formed with a pair of second step surfaces with respective ones of the second step surfaces joined at one of two ends thereof to respective ones of the pair of first step surfaces; one of the pair of second step surfaces joined at another of the two ends thereof with the second end of the portion of the tube and the other of the pair of second step surfaces joined at another of the two ends thereof with the tip end of the tube; and the pair of second step surfaces being formed with a second step diameter which is less than the first step diameter and greater than the second end diameter.
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16. A golf club, which comprises:
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a golf club shaft having a metallic body extending longitudinally along an axis of the body; the body formed with a butt end formed at one end thereof having an inboard extremity of a prescribed diameter and an outboard extremity; the body formed with a tip end formed at an end thereof axially opposite the butt end and spaced axially therefrom and having an inboard extremity of a diameter less than the prescribed diameter and an outboard extremity; the body formed with an intermediate section which extends between the inboard extremities of the butt end and the tip end wherein the diameter of an end of the intermediate section which joins the butt end is the same as the prescribed diameter and the diameter of an end of the section which joins the tip end is the same as the diameter of the inboard extremity of the tip end; a bulge formed in the body along the axis thereof; the bulge formed with radially-outward-extending axially-spaced stepped portions joined with opposite ends of a central shell-like portion between the stepped portions said central shell-like portion extending radially from the axis of the body by a distance which is greater than the diameter of at least the stepped portions immediately adjacent the opposite ends of the central shell-like portion; a grip assembled on the butt end of the body; and a club head assembled on the tip end of the body. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification