US 11,717,731 B2
Localized milled golf club face
Erik M. Henrikson, Phoenix, AZ (US); Matthew W. Simone, Phoenix, AZ (US); and Yujen Huang, Pingtung (TW)
Assigned to Karsten Manufacturing Corporation, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Sep. 30, 2021, as Appl. No. 17/449,494.
Application 17/449,494 is a continuation of application No. 16/940,142, filed on Jul. 27, 2020, granted, now 11,161,020.
Application 16/940,142 is a continuation in part of application No. 16/790,555, filed on Feb. 13, 2020, granted, now 10,905,924, issued on Feb. 2, 2021.
Application 16/790,555 is a continuation of application No. 16/438,268, filed on Jun. 11, 2019, granted, now 10,596,423, issued on Mar. 24, 2020.
Application 16/438,268 is a continuation of application No. 15/847,812, filed on Dec. 19, 2017, granted, now 10,343,034, issued on Jul. 9, 2019.
Claims priority of provisional application 62/435,944, filed on Dec. 19, 2016.
Claims priority of provisional application 62/878,668, filed on Jul. 25, 2019.
Prior Publication US 2022/0016498 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0466 (2013.01) [A63B 53/042 (2020.08); A63B 53/0408 (2020.08); A63B 53/0445 (2020.08)] 20 Claims
OG exemplary drawing
 
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;
an average bulge radius ranges inclusively from 8 to 12 inches;
an average roll radius ranges inclusively from 8 to 11 inches;
when the surface texture 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 milling pattern having overlapping and intersecting milling marks;
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
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 at least 18%.