IP Library Granted Patent US 12,599,820
Granted Patent B2
US 12,599,820 · App. 18/189,753 · Granted Apr 14, 2026

Weighted iron set

Inventors: Joshua D. Westrum (San Diego, CA); Joshua G. Breier (Vista, CA); Marni D. Ines (San Marcos, CA)
Assignee: Acushnet Company
A63B53/047A63B53/0475A63B53/005A63B53/0408A63B53/0412A63B53/0416A63B53/0433A63B2053/0491A63B2209/00
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Quick Facts
Patent No.
US 12,599,820
App. No.
18/189,753
Granted
Apr 14, 2026
Kind
B2
Abstract

The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and a tungsten weight member coupled to the toe and a tungsten heel weight member coupled in a hosel cavity.

Claims (37)

1 . A golf club head comprising:

a y-axis extending vertically through a face center of the club head and a Moment of Inertia about said y-axis,

a body comprising a heel, a toe, a topline, a sole, and a hosel;

a striking face, located at a frontal portion of said golf club head;

a toe weight member formed of tungsten and is coupled in a lower toe portion of said body and has a toe weight member mass that comprises greater than about 15% of a club head mass of said golf club head, and

a heel weight member formed of tungsten and coupled in a lower hosel portion of said body and has a heel weight member mass that comprises between about 5% and about 10% of said club head mass of said golf club head,

wherein said toe weight member further comprises;

a main supported portion, defined as a portion of said toe weight member that contacts said striking face,

an unsupported extension portion, extending toeward from said main supported portion, wherein said unsupported extension portion of said toe weight member does not contact with said striking face, and

wherein said striking face has a thickness of less than about 1.8 mm.

2 . The golf club head of claim 1 , wherein said Moment of Inertia about said y-axis is greater than about 230 kg-mm 2 .

3 . The golf club head of claim 2 , wherein said Moment of Inertia about said y-axis is greater than about 280 kg-mm 2 .

4 . The golf club head of claim 3 , wherein said golf club head has a Moment of Inertia about a shaft axis that is between about 610 kg-mm 2 and 700 kg-mm 2 .

5 . The golf club head of claim 1 , wherein said unsupported extension portion of said toe weight member is separated from said striking face by a distance d 1 of greater than about 0.05 mm.

6 . The golf club head of claim 5 , wherein said unsupported extension portion of said toe weight member is separated from said striking face by said distance d 1 of greater than about 0.075 mm.

7 . The golf club head of claim 6 , wherein said unsupported extension portion of said toe weight member is separated from said striking face by said distance d 1 of greater than about 0.1 mm.

8 . The golf club head of claim 7 , wherein a center of gravity of said toe weight member is located toeward of a bifurcation line within said toe weight member,

wherein said bifurcation line is defined as a plane that separates said main supported portion of said toe weight member and said unsupported extension portion of said toe weight member.

9 . The golf club head of claim 8 , wherein said toe weight member has a specific gravity of between about 15 g/cm 3 and about 20 g/cm 3 .

10 . A golf club head comprising:

a y-axis extending vertically through a face center of the club head and a Moment of Inertia about said y-axis,

a body comprising a heel, a toe, a topline, a sole, and a hosel;

a striking face, located at a frontal portion of said golf club head;

a toe weight member formed of tungsten and is coupled in a lower toe portion of said body, and

a heel weight member formed of tungsten and coupled in a lower hosel portion of said body,

wherein said toe weight member further comprises;

a main supported portion, defined as a portion of said toe weight member that contacts said striking face, and

an unsupported extension portion, extending toeward from said main supported portion, wherein said unsupported extension portion of said toe weight member does not contact with said striking face, and

wherein said unsupported extension portion of said toe weight member is separated from said striking face by a distance d 1 of greater than about 0.05 mm.

11 . The golf club head of claim 10 , wherein said unsupported extension portion of said toe weight member is separated from said striking face by said distance d 1 of greater than about 0.075 mm.

12 . The golf club head of claim 11 , wherein said unsupported extension portion of said toe weight member is separated from said striking face by said distance d 1 of greater than about 0.1 mm.

13 . The golf club head of claim 10 , wherein said toe weight member has a toe weight member mass that comprises greater than about 15% of a club head mass of said golf club head.

14 . The golf club head of claim 13 , wherein said toe weight member mass comprises greater than about 20% of a club head mass of said golf club head.

15 . The golf club head of claim 14 , wherein said toe weight member mass comprises greater than about 25% of a club head mass of said golf club head.

16 . The golf club head of claim 13 , wherein said Moment of Inertia about said y-axis is greater than about 230 kg-mm 2 .

17 . The golf club head of claim 16 , wherein said Moment of Inertia about said y-axis is greater than about 280 kg-mm 2 .

18 . The golf club head of claim 17 , wherein said golf club head has a Moment of Inertia about a shaft axis that is between about 610 kg-mm 2 and 700 kg-mm 2 .

Assignments (2)
SECURITY INTEREST Recorded Nov 22, 2025
From: ACUSHNET COMPANY
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 073689/0464 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 29, 2023
From: WESTRUM, JOSHUA D.; BREIER, JOSHUA G.; INES, MARNI D.
To: ACUSHNET COMPANY
Reel/Frame 063143/0876 →
Continuity (9)
Continuation In Part 17516079 · Nov 1, 2021
Continuation In Part 17117758 · Dec 10, 2020
Continuation 16589398 · Oct 1, 2019
Continuation 15951071 · Apr 11, 2018
Continuation In Part 15829534 · Dec 1, 2017
Continuation In Part 15261464 · Sep 9, 2016
Continuation In Part 14964169 · Dec 9, 2015
Continuation In Part 14626531 · Feb 19, 2015
Related Publication 20230302331A1 · Sep 28, 2023
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