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Golf club head

  • US 10,695,621 B2
  • Filed: 12/17/2018
  • Issued: 06/30/2020
  • Est. Priority Date: 12/28/2017
  • Status: Active Grant
First Claim
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1. A golf club head, comprising:

  • a body, defining an interior cavity and comprising;

    a sole portion, positioned at a bottom region of the golf club head, the sole portion having a sole surface area;

    a crown portion, positioned at a top region of the golf club head, the crown portion having a crown surface area;

    a skirt portion, positioned around a periphery of the golf club head between the sole portion and the crown portion;

    a forward region;

    a rearward region, opposite the forward region;

    a heel region; and

    a toe region, opposite the heel region;

    a face portion, coupled to the body, at the forward region of the body, and comprising a strike face and an interior surface, opposite the strike face; and

    a stiffener located within the interior cavity of the body and in direct contact with the interior surface of the face portion, wherein the stiffener is made of a material having a hardness of at least Shore 5.95D;

    wherein;

    an areal weight of the crown portion of the golf club head is less than about 0.35 g/cm2 over more than about 50% of an entire surface area of the crown portion;

    the golf club head has a center of gravity (CG) with a head center face origin x-axis coordinate between about −

    5 mm and about 5 mm and a head center face origin y-axis coordinate between about 25 mm and about 50 mm, and a center face head origin z-axis coordinate less than 2 mm;

    the strike face has a central region, defined by a forty millimeter by twenty millimeter rectangular area centered on a center of the strike face and elongated in a heel-to-toe direction;

    the face portion has a thickness that varies;

    within the central region, the face portion has a maximum face thickness no more than 4.5 mm and a minimum face thickness no less than 2.0 mm;

    within the central region, the strike face has a characteristic time (CT) of no more than 257 microseconds;

    within the central region, no less than 25% of the strike face has a coefficient of restitution (COR) of at least 0.8;

    within the central region, no less than 60% of the strike face has a CT of at least 235 microseconds;

    within the central region, no less than 35% of the strike face has a CT of at least 240 microseconds;

    the golf club head has a volume between about 350 cm3 and about 500 cm3, a moment of inertia about a head center of gravity z-axis (Izz), and a moment of inertia about a head center of gravity x-axis (Ixx);

    a summation of Izz and Ixx is between about 740 kg·

    mm2 and about 1100 kg·

    mm2;

    the face portion further comprises;

    an aperture, extending through the face portion from the strike face to the interior surface; and

    a plug, fixedly retained within the aperture; and

    the plug protrudes no more than 0.15 millimeters from the strike face or is sunken below the surface of the strike face no more than 0.1 millimeters.

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