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Localized milled golf club face

  • US 10,596,423 B2
  • Filed: 06/11/2019
  • Issued: 03/24/2020
  • Est. Priority Date: 12/19/2016
  • Status: Active Grant
First Claim
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1. A wood-style golf club head comprising:

  • a toe portion, a heel portion, a crown, and a sole;

    a strike face and a body that cooperate to define a hollow internal club head volume, the strike face further comprising a ball striking surface having a surface texture characteristic of milling;

    wherein the strike face is disposed at a loft angle of from 8 degrees to 14 degrees;

    the surface texture is uniform across the entire strike face when measured in any one direction and comprises a plurality of peaks, a plurality of valleys, and a reference mid-plane extending in between the plurality of peaks and the plurality of valleys, wherein below the reference mid-plane is a negative distance, and above the reference mid-plane is a positive distance, and the plurality of peaks and the plurality of valleys extend an average maximum distance of at least −

    200 micro inches (−

    5.08 micro meters) to at least 200 micro inches (5.08 micro meters);

    the surface texture further comprises a center portion that is surrounded by a peripheral portion;

    the central portion is round and comprises a concentric milling pattern;

    the peripheral portion comprises an emanating ray milling pattern;

    the surface texture further comprises an average surface roughness (RA), representing an arithmetic average value of absolute surface deviations relative to a mean center line, a surface void parameter (WVoid), representing an average depth of the plurality of valleys relative to a closed reference surface created using a morphologic closing filter applied to the surface texture, and a surface contact parameter (WVDCL), representing the amount of contact between the closed reference surface and the surface texture; and

    wherein the surface texture, measured within at least one of a vertical cutting plane or a second cutting plane that is orthogonal to both the vertical cutting plane and the ball striking surface, is characterized by at least one of;

    a ratio of RA to WVoid being greater than about 4;

    or, a WVDCL parameter being greater than about 24%.

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