# US 12,005,325 B2 · Golf club head

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- Number: US 12,005,325 B2
- Document ID: US12005325B2
- Status: Granted
- Kind: B2
- Application number: 17/179,888
- Filed: 2021-02-19
- Published: 2021-06-10
- Granted: 2024-06-11
- Earliest claimed: 2019-07-12
- Assignees: Sumitomo Rubber Industries, Ltd.
- Applicants: Sumitomo Rubber Industries, Ltd.
- Inventors: Dustin Brekke; Anthony Munson; Farbod Gharaei
- Web page: https://patentgrep.com/patent/US12005325B2

## CPC

- A63B 53/047: {iron-type}
- A63B 53/005: {Club sets}
- A63B 53/0408: {characterised by specific dimensions, e.g. thickness}
- A63B 53/0433: {with special sole configurations}
- A63B 53/045: {Strengthening ribs}
- A63B 53/0466: {wood-type}
- A63B 53/0475: {with one or more enclosed cavities}
- A63B 2053/0479: {Wedge-type clubs, details thereof}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

An iron-type golf club head includes a heel, a toe, a top portion, a sole portion, a top portion, a rear portion, and a striking wall. The striking wall includes a striking face having a plurality of scorelines and a face center and a rear surface. A minimum striking wall thickness T min is no greater than 2.5 min. A thickened central region of the striking wall has a maximum thickness, T max, greater than T min but no greater than 2.75. A first thickness T1 of the striking wall corresponds with a first location spaced toe-ward from the face center by a first distance D1 of between 20 mm and 30 mm. A second thickness T2 of the striking wall corresponds with a second location spaced heel-ward from the face center by the first distance D1 such that T1 is greater than T2 by no less than 0.05 mm.

## Claims

### Claim 1

An iron-type golf club head that, when oriented in a reference position, comprises:
a heel;
a toe opposite the heel;
a top portion;
a sole portion opposite the top portion;
a rear portion; and
a striking wall including:
a striking face having a plurality of scorelines and a face center;
a rear surface opposite the striking face;
a minimum striking wall thickness Tmin no greater than 2.5 mm;
a thickened central region having a maximum thickness, Tmax, greater than Tmin but no greater than 2.75 mm;
a first thickness T1 corresponding with a first location spaced toe-ward from the face center by a first distance D1 of between 20 mm and 30 mm; and
a second thickness T2 corresponding with a second location spaced heel-ward from the face center by the first distance D1 such that T1 is greater than T2 by no less than 0.05 mm.

### Claim 2 (depends on 1)

The golf club head of claim 1, wherein D1 is about 25 mm.

### Claim 3 (depends on 1)

The golf club head of claim 1, wherein T1 is greater than T2 by no less than 0.075 mm.

### Claim 4 (depends on 1)

The golf club head of claim 1, wherein the striking wall further includes:
a third thickness T3 corresponding with a third location spaced vertically along the striking face and above the face center by a second distance D2 of between 10 mm and 20 mm; and
a fourth thickness T4 corresponding with a fourth location spaced vertically along the striking face and below the face center by the second distance D2 such that T4 is greater than T3 by no less than 0.075 mm.

### Claim 5 (depends on 1)

The golf club head of claim 1, wherein the top portion, the sole portion, the striking wall and the rear portion form a substantially enclosed interior cavity.

### Claim 6 (depends on 5)

The golf club head of claim 5, wherein the interior cavity comprises therewithin at least one stiffening element secured to at least one of the top portion and the sole portion.

### Claim 7 (depends on 1)

The golf club head of claim 1, wherein a difference between Tmax and Tmin is no less than 0.25 mm.

### Claim 8 (depends on 1)

The golf club head of claim 1, further comprising a club head mass no greater than about 300 g.

### Claim 9 (depends on 1)

The golf club head of claim 1, further comprising a center of gravity and a moment of inertia, Izz, measured about a virtual vertical axis that passes through the center of gravity that is no less than 2500 g*cm2.