Golf club head with separable aft body

Patent metadata

Field	Value
Publication number	US-12564769-B2
Application number	US-202217945882-A
Country	US
Kind code	B2
Filing date	Sep 15, 2022
Priority date	Dec 13, 2018
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A golf club head that is capable improving on the inertia properties of a golf club head all while also improving the Center of Gravity (CG) location is disclosed herein. More specifically, the golf club head in accordance with the present invention achieves a relative low Moment of Inertia (MOI) about the Z-axis (MOI-Z) as well as a relatively low MOI about the Shaft-axis (MOI-SA), all combined with a high MOI about the X and Y-axis (MOI-X and MOI-Y) and maintaining a consistently and relatively low CG location measured along a direction tangent to the hosel axis along the X-Y plane (CG-B). The golf club head includes a frontal portion and a rear portion which may be secured together with rotational motion.

First claim

What is claimed is:

1 . A golf club comprised of a golf club head, a shaft having a shaft axis coupled to said golf club head at a first end of said shaft and a grip coupled to said shaft at a second end of said shaft, wherein said golf club head comprises:
a frontal portion comprised of a first material having a first density, said frontal portion comprising a striking face having a face center located at a forward portion of said frontal portion, a crown return at an upper portion of said frontal portion, and a sole return at a lower portion of said frontal portion; a rear portion comprised of a second material having a second density, said rear portion located aft of said striking face and comprising a crown at an upper portion of said rear portion and a sole at a bottom portion of said rear portion; wherein said rear portion is positionable in at least an unlocked configuration and a locked configuration relative to said frontal portion, wherein when said rear portion is in said unlocked configuration, said rear portion is freely movable relative to said frontal portion, wherein when said rear portion is in said locked configuration, said rear portion is removably coupled to said frontal portion, wherein an x-axis is defined as a horizontal axis tangent to said face center with a positive x direction towards a heel of said golf club head, a y-axis is defined as a vertical axis orthogonal to said x-axis with a positive y direction towards said crown of said golf club head, and a z-axis is defined as being orthogonal to both said x-axis and said y-axis with a positive z direction extending forward; a frontal attachment mechanism connected to a rear circumferential attachment edge of said frontal portion; and a rear attachment mechanism connected to a front circumferential attachment edge of said rear portion, wherein said rear attachment mechanism is configured to connect to said frontal attachment mechanism by rotating said rear attachment mechanism relative to said frontal attachment mechanism.

2 . The golf club of claim 1 , wherein said rear attachment mechanism is connected to said frontal attachment mechanism by rotating said rear attachment mechanism relative to said frontal attachment mechanism about said z-axis.

3 . The golf club of claim 1 , wherein one of said frontal attachment mechanism and said rear attachment mechanism includes one or more protrusions, and the other one of said frontal attachment mechanism and said rear attachment mechanism includes one or more recesses,
wherein said one or more protrusions are configured to fit within said one or more recesses to connect said frontal attachment mechanism to said rear attachment mechanism.

4 . The golf club of claim 3 , wherein said golf club head further comprises a fastener secured to said frontal attachment mechanism and said rear attachment mechanism in said locked configuration to prevent relative rotational movement between said frontal portion and said rear portion.

5 . The golf club of claim 3 , wherein said one or more protrusions are configured to fit within said one or more recesses when said frontal attachment mechanism is offset from and said rear attachment mechanism by an angle between about 1 degree and 90 degrees.

6 . The golf club of claim 5 , wherein in said locked configuration, said one or more protrusions engage with a surface adjacent to said one or more recesses to prevent relative movement between said frontal portion and said rear portion along said z-axis.

7 . The golf club of claim 1 , wherein said second density is less than said first density.

8 . A golf club comprised of a golf club head, a shaft having a shaft axis coupled to said golf club head at a first end of said shaft and a grip coupled to said shaft at a second end of said shaft, wherein said golf club head comprises:
a frontal portion comprised of a first material having a first density, said frontal portion comprising:
a striking face having a face center located at a forward portion of said frontal portion;
a crown return at an upper portion of said frontal portion;
a sole return at a lower portion of said frontal portion; and
a frontal attachment mechanism connected to a rear circumferential attachment edge;
a rear portion comprised of a second material having a second density, said rear portion located aft of said striking face and comprising:
a crown at an upper portion of said rear portion;
a sole at a bottom portion of said rear portion; and
a rear attachment mechanism connected to a front circumferential attachment edge,
wherein said rear portion is positionable in at least an unlocked configuration and a locked configuration relative to said frontal portion, wherein when said rear portion is in said unlocked configuration, said rear portion is freely movably relative to said frontal portion, wherein when said rear portion is in said locked configuration, said rear portion is removably coupled to said frontal portion and aligned with said frontal portion, wherein an x-axis is defined as a horizontal axis tangent to said face center with a positive x direction towards a heel of said golf club head, a y-axis is defined as a vertical axis orthogonal to said x-axis with a positive y direction towards said crown of said golf club head, and a z-axis is defined as being orthogonal to both said x-axis and said y-axis with a positive z direction extending forward; and at least one first weighting member located near a central portion of said golf club head in a heel-to-toe orientation, substantially in line along said z-axis with said face center, wherein said rear attachment mechanism is configured to be threadedly secured to said frontal attachment mechanism in said locked configuration.

9 . The golf club of claim 8 , wherein said rear attachment mechanism threadedly secures to said frontal attachment mechanism by rotating said rear attachment mechanism relative to said frontal attachment mechanism about said z-axis.

10 . The golf club of claim 8 , wherein one of said frontal attachment mechanism and said rear attachment mechanism includes a central portion having a threaded bore.

11 . The golf club of claim 10 , wherein said golf club head further comprises a fastener secured to said frontal attachment mechanism and said rear attachment mechanism in said locked configuration to prevent relative rotational movement between said frontal portion and said rear portion.

12 . The golf club of claim 8 , wherein one of said frontal attachment mechanism and said rear attachment mechanism includes a peripheral lip, and the other one of said frontal attachment mechanism and said rear attachment mechanism includes a peripheral groove,
wherein said peripheral lip is configured to fit within said peripheral groove when said golf club head is in said locked configuration.

13 . The golf club of claim 8 , further comprising a peripheral gasket between said rear attachment mechanism and said frontal attachment mechanism.

14 . A golf club comprised of a golf club head, a shaft having a shaft axis coupled to said golf club head at a first end of said shaft and a grip coupled to said shaft at a second end of said shaft, wherein said golf club head comprises:
a frontal portion comprised of a first material having a first density, said frontal portion comprising:
a striking face having a face center located at a forward portion of said frontal portion;
a crown return at an upper portion of said frontal portion;
a sole return at a lower portion of said frontal portion; and
a frontal attachment mechanism connected to a rear circumferential atta

Assignees

• Acushnet Co

Inventors

• Yi Sang
• Cleghorn Richard L

Classifications

• A63B53/0437

  with special crown configurations · CPC title

• A63B53/0433

  with special sole configurations · CPC title

• A63B53/0416

  Heads having an impact surface provided by a face insert · CPC title

• A63B2209/00

  Characteristics of used materials · CPC title

• A63B2053/0491

  with added weights, e.g. changeable, replaceable · CPC title