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Golf club

  • US 10,625,125 B2
  • Filed: 07/01/2019
  • Issued: 04/21/2020
  • Est. Priority Date: 01/10/2008
  • Status: Active Grant
First Claim
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1. A golf club comprising:

  • a shaft having a proximal end and a distal end;

    a grip attached to the shaft proximal end; and

    a golf club head attached to the shaft distal end producing a club length of at least 41 inches and no more than 45 inches, wherein the golf club head includes;

    (a) a face positioned at a front portion of the golf club head where the golf club head impacts a golf ball, the face has a loft of at least 12 degrees and no more than 27 degrees, and the face includes an engineered impact point and a top edge height of 1.1-2.1 inches;

    (b) a sole positioned at a bottom portion of the golf club head;

    (c) a crown positioned at a top portion of the golf club head;

    (d) a skirt positioned around a portion of a periphery of the golf club head between the sole and the crown, wherein the face, sole, crown, and skirt define an outer shell that further defines a head volume that is less than 250 cubic centimeters, a portion of the shell has a density of less than 5 g/cc, and the golf club head has a rear portion opposite the face;

    (e) a bore having a center that defines a shaft axis which intersects with a horizontal ground plane to define an origin point, wherein the bore is located at a heel side of the golf club head and receives the shaft distal end for attachment to the golf club head, and wherein a toe side of the golf club head is located opposite of the heel side;

    (f) a blade length measured horizontally from the origin point toward the toe side of the golf club head a distance that is generally parallel to the face and the ground plane to the most distant point on the golf club head in this direction, wherein the blade length includes a heel blade length section measured in the same direction as the blade length from the origin point to the engineered impact point;

    (g) a club head mass of less than 230 grams;

    (h) a center of gravity (CG) located;

    (1) vertically toward the top portion of the golf club head from the origin point a distance Ycg;

    (2) horizontally from the origin point toward the toe side of the golf club head a distance Xcg that is generally parallel to the face and the ground plane;

    (3) a distance Zcg from the origin toward the rear portion in a direction generally orthogonal to the vertical direction used to measure Ycg and generally orthogonal to the horizontal direction used to measure Xcg, wherein the Zcg distance is less than 0.65 inches;

    (4) such that a club moment arm is a distance from the CG to the engineered impact point, wherein the club moment arm is less than 1.1 inches, a transfer distance is a horizontal distance from the CG to a vertical line extending from the origin point, and a CG angle from the origin point to the center of gravity is no more than 30 degrees; and

    (i) a first moment of inertia (MOIy) about a vertical axis through the CG of at least 2000 g*cm2.

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