US 11,654,339 B2
Multi-material iron golf club head
Jacob T. Clarke, Apex, NC (US); Cory S. Bacon, Cave Creek, AZ (US); Dave Wu, Pingtung (TW); Martin R. Jertson, Phoenix, AZ (US); Travis D. Milleman, Portland, OR (US); and Ryan M. Stokke, Anthem, AZ (US)
Assigned to KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Jul. 13, 2021, as Appl. No. 17/305,712.
Application 17/305,712 is a continuation of application No. 16/286,462, filed on Feb. 26, 2019, granted, now 11,058,931.
Claims priority of provisional application 62/768,543, filed on Nov. 16, 2018.
Claims priority of provisional application 62/713,424, filed on Aug. 1, 2018.
Claims priority of provisional application 62/635,020, filed on Feb. 26, 2018.
Prior Publication US 2021/0339094 A1, Nov. 4, 2021
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0475 (2013.01) [A63B 53/0412 (2020.08); A63B 53/0445 (2020.08); A63B 2209/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A golf club head comprising:
a faceplate, a body, and an insert;
the body comprising an upper portion, a lower portion, a sole, a rear, and a top rail;
wherein:
the faceplate and a portion of the body define a striking surface of the golf club head;
the faceplate, the sole, the rear, and the top rail enclose a cavity;
the rear comprises an inflection seam;
the sole rests on a ground plane;
a loft plane is tangential to the faceplate and intersects the ground plane;
the upper portion is bounded by the top rail and the inflection seam;
the lower portion is bounded by the sole and the inflection seam;
the upper portion defines a rear opening that connects to the cavity;
the rear opening covers a projected area between 25% and 50% of a total projected area of the rear, wherein the projected areas are measured parallel to the loft plane;
the cavity comprises a volume;
the cavity volume is between 17% and 32% of the total club head volume;
the cavity volume in the lower portion is greater than the cavity volume in the upper portion;
the insert is received in the cavity, and the insert complements 90% or more of the cavity;
the faceplate comprises a first material of a first density;
the body comprises a second material of a second density;
the insert comprises a third material of a third density;
the third density is less than the first and second densities; and
the third density is between 2.4 and 3.0 g/cc.