US 12,257,484 B2
Multi-piece golf club head
Charles Chou, Kaohsiung (TW); Mark Greaney, Vista, CA (US); Stephen Kraus, Kaohsiung (TW); Bryan Cheng, Kaohsiung (TW); Kevin Cheng, Kaohsiung (TW); Matthew Greensmith, Carlsbad, CA (US); Christopher Harbert, Carlsbad, CA (US); Todd Beach, San Diego, CA (US); and Matthew D. Johnson, Carlsbad, CA (US)
Assigned to TAYLOR MADE GOLF COMPANY, INC., Carlsbad, CA (US)
Filed by Taylor Made Golf Company, Inc., Carlsbad, CA (US)
Filed on May 25, 2023, as Appl. No. 18/323,935.
Claims priority of provisional application 63/345,875, filed on May 25, 2022.
Prior Publication US 2023/0381605 A1, Nov. 30, 2023
Int. Cl. A63B 53/04 (2015.01); A63B 102/32 (2015.01)
CPC A63B 53/0475 (2013.01) [A63B 53/0412 (2020.08); A63B 2102/32 (2015.10)] 55 Claims
OG exemplary drawing
 
1. A method of manufacturing a golf club head, comprising:
forming a frame comprising a crown opening surrounded by a crown bonding ledge at least partially defining a bond area for bonding a composite crown insert to the frame, wherein the frame comprises:
a face positioned at a forward portion of the frame, a rear portion positioned opposite the face, a sole portion positioned at a bottom portion of the frame, a crown portion positioned at a top portion of the frame, the frame defining an interior cavity that is at least partially enclosed by the composite crown insert;
a hosel defining a hosel opening; and
at least one weight port formed in the rear portion of the frame, and configured to receive at least one weight configured to be retained at least partially within the at least one weight port;
wherein:
the face has a striking surface and a head origin defined as a position on the striking surface at approximately a geometric center of the striking surface, the head origin including a head origin x-axis, a head origin y-axis, and a head origin z-axis;
the head origin x-axis is tangential to the striking surface and generally parallel to a ground plane when the head is ideally positioned, and a positive x-axis extends from the head origin towards a heel of the frame and a negative x-axis extends from the head origin towards a toe of the frame;
the head origin y-axis extends generally perpendicular to the head origin x-axis and parallel to the ground plane when the head is ideally positioned, and a positive y-axis extends from the head origin towards a rear portion of the frame;
the head origin z-axis extends perpendicular to the head origin x-axis and perpendicular to the head origin y-axis and having a positive z-axis that extends from the head origin towards the top portion of the frame and a negative z-axis that extends from the head origin towards the bottom portion of the frame;
the hosel opening has:
an upper hosel opening positioned in the crown portion of the frame, the upper hosel opening configured to receive an adjustable loft system comprising a shaft sleeve mounted on a lower end portion of a club shaft having a club shaft axis, wherein the adjustable loft system is configured to allow a maximum loft change, and wherein the shaft sleeve comprises a lower end portion defining a threaded opening; and
a lower hosel opening positioned in the sole portion, wherein the lower hosel opening is in communication with the upper hosel opening, and is configured to receive a screw that is configured to be inserted through the lower hosel opening and tightened into the threaded opening of the shaft sleeve to releasably secure the shaft sleeve; and
the adjustable loft system and the at least one weight are configured to be adjustable by a single engagement end of a single tool;
retaining the at least one weight within the at least one weight port; and
adhesively bonding the composite crown insert to at least the crown bonding ledge of the frame to form at least a portion of a crown of a manufactured golf club head, the composite crown insert having an interior surface comprising a total interior surface area, and a crown insert bond area;
wherein:
the crown insert bond area is defined on a portion of the interior surface of the crown insert;
a percentage of the total interior surface area occupied by the bond area on the interior surface of the crown insert is no more than 35%;
after bonding the composite crown insert to at least the crown bonding ledge of the frame, at least 50 percent of the crown has an areal weight less than 0.35 g/cm2;
the manufactured golf club head comprises at least the frame and the composite crown insert, and the manufactured golf club head has a golf club head body having a center of gravity, the center of gravity having:
a head origin x-axis coordinate no less than-10 mm and no more than 10 mm,
a head origin y-axis coordinate of at least 25 mm and no more than 50 mm, and
a head origin z-axis coordinate no less than-10 mm and no more than 2 mm;
the golf club head body has a moment of inertia (Ixx) about a center of gravity x-axis (CG x-axis), wherein the CG x-axis is parallel to the head origin x-axis and passes through the center of gravity of the golf club head body;
the golf club head body has a moment of inertia (Izz) about a center of gravity z-axis (CG z-axis), wherein the CG z-axis is parallel to the head origin z-axis and passes through the center of gravity of the golf club head body;
the Ixx is at least 250 kg·mm2 and no more than 590 kg·mm2;
the Izz is at least 400 kg·mm2 and no more than 590 kg·mm2;
a ratio of Ixx to Izz is at least 0.65;
the bond area has a variable width and the total interior surface area of the crown insert is at least 7000 mm2 and the bond area of the crown insert is at least 2000 mm2; and
the percentage of the total interior surface area occupied by the bond area on the interior surface of the crown insert is no less than 10%.