Weighted iron set

Patent metadata

Field	Value
Publication number	US-10478681-B2
Application number	US-201815896852-A
Country	US
Kind code	B2
Filing date	Feb 14, 2018
Priority date	Feb 19, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 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 significant tungsten weight members coupled to at least the toe and a 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 and a first club head mass, a second club head having a loft of between about 26 and 35 degrees and a second club head mass, and a third club head having a loft of about 36 degrees or greater and a third club head mass,
the first club head comprising:
a body made of steel comprising a heel, a toe, a topline, a sole, a hosel, a front face insert made of steel and a back wall forming a hollow cavity therebetween,
a toe weight member formed of tungsten and coupled to a toe portion of the hollow cavity that comprises 25%-35% of the first club head mass; and
a heel weight member formed of tungsten and coupled into a hosel cavity formed in a lower portion of the hosel, the heel weight member comprising 5%-10% of the first club head mass, wherein the heel weight member is enclosed in the hosel cavity by a steel cover member that forms at least a portion of the hosel.

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, a second front face insert made of steel and a second back wall forming a second hollow cavity therebetween, and
a second toe weight member formed of tungsten and coupled to a second toe portion of the second hollow cavity that comprises 25%-35% of the second club head mass.

3. The set of golf clubs of claim 2 , wherein the first toe weight member and the second toe weight member are at least 65 grams each.

4. The set of golf clubs of claim 2 , wherein the first club head and the second club head have a Moment of Inertia about the y-axis, extending vertically through a face center, of greater than 250 kg-mm 2 .

5. The set of golf clubs of claim 1 , wherein the first club head has a Center of Gravity that is less than 18 mm from a ground surface when the club head is in the standard address position and is greater than 6 mm from a face center toward the back surface.

6. The set of golf clubs of claim 1 , wherein the first club head has a Moment of Inertia about the y-axis of greater than 250 kg-mm 2 and a blade length of less than 82 mm.

7. A set of golf clubs comprising at least three first club heads having a loft between about 15 and 25 degrees and first club head masses, at least three second club heads having a loft of between about 26 and 35 degrees and second club head masses, and a third club head having a loft of about 36 degrees or greater and a third club head mass, each of the first club heads comprising:
a body made of steel comprising a heel, a toe, a topline, a sole, a hosel, a front face insert made of steel and a back wall forming a hollow body having a first blade length,
a toe weight member formed of tungsten and coupled to a lower toe portion of the hollow body that comprises 25%-35% of the first club head mass; and
a heel weight member formed of tungsten and coupled a lower hosel portion of the body that comprises 5%-10% of the first club head mass;
wherein the combined mass of the toe weight members and the heel weight members for the first club heads increases with loft;
wherein the first club heads have a Center of Gravity that is less than 18 mm from a ground surface when the club head is in the standard address position and a Moment of Inertia about the y-axis of greater than 250 kg-mm 2 ; and
wherein at least one of the first club heads' Moment of Inertia about the y-axis, which extends vertically through a face center of the first club head, is greater than a second Moment of Inertia about the y-axis which extends vertically through a face center of at least one of the second club heads and less than a third Moment of Inertia about the y-axis which extends vertically through a face center of the third club head.

8. The set of golf clubs of claim 7 , wherein the first blade lengths are less than 82 mm.

9. The set of golf clubs of claim 8 , wherein the first club heads have a Moment of Inertia about the y-axis to blade length ratio of greater than 3 kg-mm.

10. The set of golf clubs of claim 9 , wherein the Center of Gravity depth from the face center for the first club heads are almost 1/10 the first blade length.

11. The set of golf clubs of claim 7 , wherein the second club heads have second Center of Gravities that are less than 19 mm from a ground surface when the club head is in the standard address position and the third club head has a third Center of Gravity that is less than 19 mm from a ground surface when the club head is in the standard address position.

12. The set of golf clubs of claim 7 , wherein each of the club heads has a Center of Gravity height from the ground that increases with loft through the set.

13. The set of golf clubs of claim 7 , wherein the Moment of Inertia about the y-axis for the first club heads increases with loft.

Assignees

• Acushnet Co

Inventors

• Franz Michael E
• Ines Marni
• Hebreo Jonathan
• Ritchie Ryan J A

Classifications

• A63B2053/0491

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

• A63B60/02

  Ballast means for adjusting the centre of mass (A63B60/24, A63B60/54 take precedence) · CPC title

• A63B53/047 Primary

  iron-type · CPC title

• A63B53/0475

  with one or more enclosed cavities · CPC title

• A63B2053/005

  Human Necessities · mapped topic