# US 9,750,994 B2 · Progressive iron set

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- Number: US 9,750,994 B2
- Document ID: US9750994B2
- Status: Granted
- Kind: B2
- Application number: 15/016,628
- Filed: 2016-02-05
- Published: 2016-06-02
- Granted: 2017-09-05
- Earliest claimed: 2013-05-06
- Assignees: Acushnet Company
- Applicants: Acushnet Company
- Inventors: Michael E. Franz; Brandon Vincent; Marni Ines; Jonathan Hebreo; Eduardo Mendoza
- Web page: https://patentgrep.com/patent/US9750994B2

## CPC

- A63B 53/047: {iron-type}
- A63B 60/00: Details or accessories of golf clubs, bats, rackets or the like
- A63B 60/02: Ballast means for adjusting the centre of mass (A63B60/24, A63B60/54 take precedence)
- A63B 53/005: {Club sets}
- A63B 53/0408: {characterised by specific dimensions, e.g. thickness}
- A63B 2053/0491: {with added weights, e.g. changeable, replaceable}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The long irons have a first center of gravity positioned horizontally from the face center toward the hosel by a first distance. The mid-irons have a second center of gravity positioned horizontally from the face center toward the hosel by a second distance. The short irons have a third center of gravity positioned horizontally from the face center toward the hosel by a third distance that is greater than the first and second distances.

## Claims

### Claim 1

A set of golf clubs comprising at least a first golf club, a second golf club, and a third 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, and
the first golf club further comprising a first loft angle (LA1) of between 15 and 25 degrees and a first center of gravity positioned horizontally from the face center toward the hosel by a first distance between about 1 mm and 3 mm,
the second golf club comprising a second loft angle (LA2) of between 26 and 36 degrees and a second center of gravity positioned horizontally from the face center toward the hosel by a second distance of between about 1 mm and 3 mm, and
the third golf club comprising a third loft angle (LA3) of between 37 and 47 degrees and a third center of gravity positioned horizontally from the face center toward the hosel by a third distance,
wherein the first distance and the second distance are approximately constant and the third distance is at least 30 percent greater than the first distance and at least 30 percent greater than the second distance.

### Claim 2 (depends on 1)

The set of golf clubs of claim 1, wherein the third distance is between 35 percent and 70 percent greater than the first distance and between 35 percent and 70 percent greater than the second distance.

### Claim 3 (depends on 1)

The set of golf clubs of claim 1, wherein the third distance is between about 3 mm and 4 mm.

### Claim 4 (depends on 1)

The set of golf clubs of claim 1, wherein, for the third golf club, the third distance is greater than about 15 percent of a center of gravity position measured vertically from the ground.