Method of forming an iron set

Patent metadata

Field	Value
Publication number	US-9718119-B2
Application number	US-201514688056-A
Country	US
Kind code	B2
Filing date	Apr 16, 2015
Priority date	May 6, 2013
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

The present invention is directed to a set of golf clubs comprising long irons, mid-irons and short irons. The irons have a progressive horizontal CG location. Preferably, the long and MID irons have a CG located between about 1 mm and 3 mm towards the hosel and the short iron CG is located between about 3 mm and 4 mm toward the hosel. Further the irons can have a substantially constant blade width with progressively increasing toe height and progressively decreasing scoreline width.

First claim

What is claimed is:

1. A method of forming a set of golf clubs comprising at least a first golf club, a second golf club, and a third golf club, wherein the first, second and third golf clubs each comprising a heel, a toe, an upper surface, a lower surface, a hosel and a front face having a face center, the steps comprising
forming a first golf club having a first loft angle (LA 1 ) of between 15 and 25 degrees and a first center of gravity positioned horizontally from the face center towards the hosel by a first distance by forging a first body comprising a weight pocket adjacent the toe and a face stabilizing bar, machining an aperture in the face stabilizing bar, and attaching a toe weight member in the weight pocket and welding a back panel to the first body to form a portion of the sole and a back wall,
forming a second golf club comprising a second loft angle (LA 2 ) of between 26 and 36 degrees and a second center of gravity positioned horizontally from the face center towards the hosel by a second distance by forging a second body comprising a second face stabilizing bar, machining an aperture in the second face stabilizing bar, and attaching a second toe weight member and a second back panel to the second body, and
forming third golf club comprising a third loft angle (LA 3 ) of between 37 and 47 degrees and a third center of gravity positioned horizontally from the face center towards the hosel by a third distance by forging a solid third body.

2. The method of forming the set of golf clubs of claim 1 , wherein the first distance and the second distance are approximately constant and the third distance is between 35 percent and 70 percent greater than the first distance.

3. The method of forming the set of golf clubs of claim 2 , wherein the first and second distance are between about 1 mm and 3 mm.

4. The method of forming the set of golf clubs of claim 1 , wherein the third distance is between about 3 mm and 4 mm and at least 30% greater than the first distance and the second distance.

5. The method of forming the set of golf clubs of claim 1 , further comprising the steps of forming an aperture in the sole, near the heel of the first body and press fitting a weight member therein.

6. The method of forming a set of golf clubs of claim 1 , wherein the step of forming the first golf club includes forming the first distance to be about 0 mm, the step of forming the second golf club includes forming the second distance to be about 1.15 mm and the step of forming the third golf club includes forming the third distance to be greater than 3 mm.

7. The method of forming a set of golf clubs of claim 6 , wherein the step of forming the first golf club, the second golf club and the third golf club includes forming the center of gravity of each golf club at a height of less than 19 mm from a ground plane when in the address position.

8. A method of forming a golf club comprising the steps of:
forging a body with a face, a topline, a sole portion, a toe portion, a heel portion, a weight pocket and a face stabilizing bar having a length,
machining an aperture into the face stabilizing bar, and
attaching a weight member and a back panel to the body;

wherein the step of forging the body includes forging the face stabilizing bar such that it extends from an upper heel portion toward a lower toe portion at an angle of 10 degrees to 60 degrees with the topline and at an angle of 5 degrees to 45 degrees with a ground plane when in an address position.

9. A method of forming a golf club comprising the steps of:
forging a body with a face, a topline, a sole portion, a toe portion, a heel portion, a hosel, a weight pocket and a face stabilizing bar having a length,
machining an aperture into the face stabilizing bar, and
attaching a weight member and a back panel to the body;

wherein the step of forging the body includes forging the face stabilizing bar such that it extends from an upper heel portion towards a lower toe portion and forms an angle of 5 degrees to 45 degrees with a ground plane when in an address position and
wherein machining the face stabilizing bar forms a face portion and a back portion with an undercut cavity therebetween that is deeper at the heel portion than at the toe.

10. The method of forming a golf club of claim 9 , further comprising the step of annealing the hosel by placing an induction heating coil over a bottom portion of the hosel and heating the bottom portion of the hosel to a temperature of 500 degrees Celsius to 1000 degrees Celsius for 5 to 20 seconds and then cooling the club head.

11. A method of forming a golf club comprising the steps of:
forging a body with a face, a topline, a sole portion, a toe portion, a heel portion, a weight pocket and a face stabilizing bar having a length,
machining an aperture into the face stabilizing bar, and
attaching a weight member to the weight pocket and a back panel to the body;

wherein the face stabilizing bar extends from an upper heel portion to a lower toe portion and the step of machining an aperture into the face stabilizing bar forms a face portion and a back portion and the step of attaching the back panel forms an undercut cavity between the face portion and the back portion that is deeper at the heel portion than at the toe portion.

12. The method of forming a golf club of claim 11 , wherein the face stabilizing bar forms an angle of 5 degrees to 45 degrees with a ground plane when in an address position.

Assignees

• Acushnet Co

Inventors

• Zimmerman Gery M
• Ines Marni
• Hebreo Jonathan
• Franz Michael E
• Mendoza Eduardo

Classifications

• A63B2053/0491

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

• A63B60/50

  with through-holes (A63B60/18 takes precedence; for stringing purposes A63B49/00) · CPC title

• A63B60/52

  with slits · CPC title

• B21K17/00 Primary

  Making sport articles, e.g. skates · CPC title

• A63B53/047

  iron-type · CPC title