IRON TYPE GOLF CLUB SET

• US 20170259132A1
• Filed: 03/10/2017
• Published: 09/14/2017
• Est. Priority Date: 03/11/2016
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: SHIMAHARA, Yuki, KOHNO, Daisuke
• Granted Patent: US 9,956,461 B2
• Time in Patent Office: Days
• CPC Class Codes: A63B 53/005 Club sets
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/047 iron-type

Abstract

A set 2 includes two or more iron type golf clubs 4 having loft angles different from each other. Each club 4 includes a shaft sf, a head hd, and a grip gp. The head hd includes a top surface 10, a sole surface 12, and a face surface 14 having a face line gv. The sole surface 12 includes a leading edge E1 and a trailing edge E2. In a planar view of the sole surface 12, the trailing edge E2 is curved so as to project toward a face side. A sole width WSt at a toe reference position is decreased as the loft angle is increased. A sole width WSh at a heel reference position is decreased as the loft angle is increased.

Claims

1. An iron type golf club set comprising two or more iron type golf clubs having loft angles different from each other,

wherein:

each of the golf clubs includes a shaft, a head attached to a tip part of the shaft, and a grip attached to a rear end part of the shaft;

the head includes a sole surface and a face surface having face lines;

the sole surface includes a leading edge and a trailing edge;

the trailing edge is curved so as to project toward a face side in a planar view of the sole surface;

a sole width WSt at a toe reference position is decreased as the loft angle is increased; and

a sole width WSh at a heel reference position is decreased as the loft angle is increased.

2. The golf club set according to claim 1, wherein a sole width WSc at a central position of the face line is increased as the loft angle is increased.

3. The golf club set according to claim 1,

wherein if a sole width at a central position of the face line is defined as WSc,

a difference (WSt−

WSc) is decreased as the loft angle is increased; and

a difference (WSh−

WSc) is decreased as the loft angle is increased.

4. The golf club set according to claim 1,

wherein a curvature radius of the trailing edge in the planar view is increased as the loft angle is increased.

5. The golf club set according to claim 1,

wherein:

the sole surface includes a ridgeline extending from a toe side toward a heel side, a leading surface extending between the ridgeline and the leading edge, and a trailing surface extending between the ridgeline and the trailing edge;

the leading surface is inclined upward toward the face side; and

the trailing surface is inclined upward toward a back side.

6. The golf club set according to claim 1, wherein:

the set includes at least two selected from the group consisting of the following first club, second club and third club;

first club;

a club having a loft angle of 22 degrees or greater but less than 28.5 degrees, and a club length of 37.25 inches or greater but 38.5 inches or less;

second club;

a club having a loft angle of 28.5 degrees or greater but less than 36.5 degrees, and a club length of 36.25 inches or greater but less than 37.25 inches;

third club;

a club having a loft angle of 36.5 degrees or greater but 47 degrees or less, and a club length of 35 inches or greater but less than 36.25 inches.

7. The golf club set according to claim 6, wherein:

the set includes the first club, the second club and the third club.

8. The golf club set according to claim 1, wherein:

the face lines include a longest face line,

the position of a toe side end of the longest face line is the toe reference position,

the position of a heel side end of the longest face line is the heel reference position.