# US 5,333,859 A · Constant swing golf club set by varied club length

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- Number: US 5,333,859 A
- Document ID: US5333859A
- Status: Granted
- Kind: A
- Application number: 07/881,083
- Filed: 1992-05-11
- Granted: 1994-08-02
- Earliest claimed: 1989-06-13
- Assignees: The Yokohama Rubber Co., Ltd.
- Inventors: Mitsutake Teramoto; Takaharu Okumoto; Teruo Goto; Shinkichi Saito; Hideyo Asabuki
- Web page: https://patentgrep.com/patent/US5333859A

## CPC

- A63B 53/00: Golf clubs
- A63B 60/00: Details or accessories of golf clubs, bats, rackets or the like
- A63B 53/005: {Club sets}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

An iron golf club set characterized in that the difference of the club lengths between at least two adjacent golf clubs in terms of the club number in a middle iron golf club group is set to be greater than the pitch difference of the club length between the club numbers in a long iron golf club group and the pitch difference of the club lengths between the club numbers in a short iron golf club group.

## Claims

### Claim 1

An iron golf club set of consecutively numbered clubs comprising a long iron golf club group, a middle iron golf club group and a short iron golf club group, each group consisting of two or more iron golf clubs, all of the iron golf clubs having a club number that increases from a first club in the long iron group to a last club in the short iron group, said golf clubs in said long iron group having a constant club length, said golf clubs in said middle iron group having a club length that decreases with increasing club number from the longest club in said middle iron group to the shortest club in said middle iron group and said golf clubs in said short iron group having a constant club length, the length of the short iron golf clubs being shorter than the length of the long iron golf clubs and the length of the middle iron golf clubs being no longer than the length of the long iron golf clubs and no shorter than the length of the short iron golf clubs wherein the length of the iron golf club having the smallest club number in said middle iron group is shorter than the iron golf club having the largest number in said long iron group.

### Claim 2 (depends on 1)

The iron golf club of claim 1, wherein the length of the iron golf club having the largest club number in said middle iron group is equal to the length of the iron golf clubs in said short iron group.

### Claim 3 (depends on 1)

The iron golf club set of claim 1, wherein the length of the clubs in said middle iron group decrease at a constant pitch difference P.sub.M with increasing club number.

### Claim 4 (depends on 1)

The iron golf club set of claim 1, wherein the length of the clubs in said middle iron group decrease at a constant pitch difference P.sub.M with increasing club number, the difference between the length of the iron golf club having the smallest club number in said middle iron group and the length of the iron golf club having the highest club number in said long iron group being equal to the pitch difference P.sub.M.

### Claim 5 (depends on 1)

The iron golf club set of claim 1, wherein the long iron group includes three iron golf clubs numbered 1 to 3, the middle iron group three iron golf clubs numbered 4-6, and the short iron group, three iron golf clubs numbered 7-9.