Weighted iron set

Patent metadata

Field	Value
Publication number	US-10463933-B2
Application number	US-201815951071-A
Country	US
Kind code	B2
Filing date	Apr 11, 2018
Priority date	Feb 19, 2015
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

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.

First claim

What is claimed is:

1. A set of golf clubs comprising at least a first club head having a loft between about 15 and 25 degrees, a first club head mass, a y-axis extending vertically through a face center of the first club head and a first Moment of Inertia about the y-axis, a second club head having a loft of between about 26 and 35 degrees, a second club head mass, a second y-axis extending vertically through a face center of the second club head and a second Moment of Inertia about the second y-axis, and a third club head having a loft of about 36 degrees or greater, a third club head mass, a third y-axis extending vertically through a face center of the third club head and a third Moment of Inertia about the third y-axis,
the first club head comprising:
a first body made of steel comprising a first heel, a first toe, a first topline, a first sole, a first hosel, and a first back wall,
a first face insert made of steel and having a first face insert mass that is welded to the first body to form a first hollow cavity between the first face insert and the first back wall;
a first toe weight member formed of tungsten and coupled in a lower toe portion of the first hollow cavity that has a first toe weight member mass that comprises greater than 25% of the first club head mass; and
a first heel weight member formed of tungsten and coupled in a first hosel cavity of the first body such that a shaft axis intersects the first heel weight member below the first hosel, the first heel weight member comprising between 5% and 10% of the first club head mass;
wherein the first face insert mass is less than first toe weight member mass and a Moment of Inertia about the y-axis to blade length ratio is greater than about 3 kg-mm, and
wherein the first sole has a first sole width and the first face insert includes a first face insert sole portion that extends from a leading edge of the first face insert toward the first back wall a distance in front-to-back direction that is at least 25% of the first sole width.

2. The set of golf clubs of claim 1 , wherein the second club head comprises:
a second body made of steel comprising a second heel, a second toe, a second topline, a second sole, a second hosel, and a second back wall,

a second face insert made of steel and having a second face insert mass, the second face insert being welded to the body to form a second hollow cavity between the second face insert and the second back wall;
a second toe weight member formed of tungsten and coupled in a lower toe portion of the second hollow cavity that has a second toe weight member mass that comprises greater than 25% of the second club head mass; and
a second heel weight member formed of tungsten and coupled in a second hosel cavity of the second body such that a second shaft axis intersects the second heel weight member below the second hosel, the second heel weight member comprising between 8% and 15% of the second club head mass;
wherein the second face insert mass is less than second toe weight member mass and a second Moment of Inertia about the second y-axis to blade length ratio is greater than about 3 kg-mm.

3. The set of golf clubs of claim 2 , wherein the first face insert and the second face insert have Ultimate Tensile Strengths of greater than 2000 MPa.

4. The set of golf clubs of claim 3 , wherein the first face insert and the second face insert have thicknesses of 1.8 mm or less.

5. The set of golf clubs of claim 1 , wherein the first Moment of Inertia about the y-axis is less than both the second Moment of Inertia about the second y-axis and the third Moment of Inertia about the third y-axis.

6. The set of golf clubs of claim 1 , wherein the first club has a first Moment of Inertia about the shaft axis that is between 650 kg-mm 2 and 700 kg-mm 2 , the second club has a second Moment of Inertia about the shaft axis that is between 650 kg-mm 2 and 700 kg-mm 2 and the third club has a third Moment of Inertia about the shaft axis that is between 650 kg-mm 2 and 700 kg-mm 2 .

7. The set of golf clubs of claim 6 , wherein the first Moment of Inertia about the shaft axis is within 10% of the second Moment of Inertia about the shaft axis and the second Moment of Inertia about the shaft axis is within 10% of the third Moment of Inertia about the shaft axis.

8. The set of golf clubs of claim 1 , wherein the first club has a first Moment of Inertia about the shaft axis, the second club has a second Moment of Inertia about the shaft axis and the third club has a third Moment of Inertia about the shaft axis, wherein the first Moment of Inertia about the shaft axis is within 5% of the second Moment of Inertia about the shaft axis and the second Moment of Inertia about the shaft axis is within 5% of the third Moment of Inertia about the shaft axis.

9. The set of golf clubs of claim 1 , wherein the first iron has a first blade length and the first face insert sole portion extends from a heel-side front wall toward the toe a length in the heel-to-toe direction that is between 50% and 80% of the first blade length.

10. The set of golf clubs of claim 9 , wherein the first face insert has a thickness of 1.8 mm or less and has an Ultimate Tensile Strength of 2300 MPa or greater.

11. The set of golf clubs of claim 10 , wherein the first face insert has a Fatigue Strength of greater than 800 MPa.

12. The set of golf clubs of claim 1 , wherein the first heel weight member is arcuate and has an arc angle of 5 to 60 degrees.

13. The set of golf, clubs of claim 12 , wherein the first heel weight member has an arc radius of between 10 mm and 50 mm.

14. The set of golf clubs of claim 12 , wherein the first club has a first blade length and the first heel weight member has an arc radius that is less than ½ the first blade length.

15. The set of golf clubs of claim 1 , wherein the first heel weight member is arcuate and has an arc angle of 20 to 45 degrees.

Assignees

• Acushnet Co

Inventors

• Mata Jason A
• Ines Marni D
• Hebreo Jonathan
• Breier Joshua G
• Franz Michael E
• Stokes Joshua C
• Martens Grant M

Classifications

• A63B53/0475

  with one or more enclosed cavities · CPC title

• A63B2053/0491

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

• A63B53/047 Primary

  iron-type · CPC title

• A63B2053/0412

  Human Necessities · mapped topic

• A63B2053/005

  Human Necessities · mapped topic