GOLF CLUB SET

• US 20110105240A1
• Filed: 10/29/2010
• Published: 05/05/2011
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: ABE, Hiroshi
• Granted Patent: US 8,409,029 B2
• Time in Patent Office: Days
• US Class Current: 473/291
• CPC Class Codes: A63B 53/005 Club sets
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/047 iron-type

Abstract

Groove depths D1 of clubs are defined as D1(1), D1(2), . . . , D1(n) in an order from the club having the smallest real loft angle L1, and groove widths W1 of face lines of the clubs measured by the 30 degree method of measurement are defined as W1(1), W1(2), . . . , W1(n) in an order from the club having the smallest real loft angle L1. At this time, a golf club set satisfies D1(1)≦D1(2)≦ . . . ≦D1(n). A ratio [D1(m)/D1(m−1)] of the groove depths D1 between two golf clubs with adjacent club numbers is 1.0 or greater and 3.0 or less. The golf club set satisfies W1(1)≦W1(2)≦ . . . ≦W1(n). A ratio [W1(m)/W1(m−1)] of the groove widths W1 between two golf clubs with adjacent club numbers is 1.0 or greater and 3.0 or less.

Claims

1. A golf club set comprising n pieces of golf clubs (n is an integer of equal to or greater than 3),

wherein when groove depths D1 of face lines of the clubs are defined as D1(1), D1(2), . . . , D1(n) in an order from the club having the smallest real loft angle L1;

and

groove widths W1 of the face lines of the clubs measured by the 30 degree method of measurement are defined as W1(1), W1(2), . . . , W1(n) in an order from the club having the smallest real loft angle L1,

D1(1)≦

D1(2)≦

. . . ≦

D1(n) and D1(1)<

D1(n) are satisfied;

the groove depths D1 of all the clubs are 0.0 (mm) or greater and 0.508 (mm) or less;

a ratio [D1(m)/D1(m−

1)] of the groove depths D1 between two golf clubs with adjacent club numbers in all the clubs is 1.0 or greater and 3.0 or less;

W1(1)≦

W1(2)≦

. . . ≦

W1(n) is satisfied;

the groove widths W1 of all the clubs are 0.0 (mm) or greater and 0.889 (mm) or less; and

a ratio [W1(m)/W1(m−

1)] of the groove widths W1 between two golf clubs with adjacent club numbers in all the clubs is 1.0 or greater and 3.0 or less.

2. The golf club set according to claim 1, wherein W1(1)<

W1(n) is satisfied.

3. The golf club set according to claim 1, wherein when groove bottom widths W2 are defined as W2(1), W2(2), . . . , W2(n) in an order from the club having the smallest real loft angle L1, W2(1)≦

W2(2)≦

. . . ≦

W2(n) and W2(1)<

W2(n) are satisfied;

the groove bottom widths W2 of all the clubs are 0.0 (mm) or greater and 1.0 (mm) or less; and

a ratio [W2(m)/W2(m−

1)] of the groove bottom widths W2 between two golf clubs with adjacent club numbers in all the clubs is 1.0 or greater and 3.0 or less.

4. The golf club set according to claim 1, wherein a ratio [D1(n)/D1(1)] is equal to or greater than 1.2, and a ratio [W1(n)/W1(1)] is equal to or greater than 1.1.

5. The golf club set according to claim 1, wherein the golf club set comprises a golf club having a real loft angle L1 of equal to or less than 40 degrees and a golf club having a real loft angle L1 exceeding 40 degrees.

6. The golf club set according to claim 1, wherein the golf club set comprises a golf club having a real loft angle L1 of equal to or greater than 50 degrees.

8. The golf club set according to claim 1, wherein curvature radius R1 of edges of the face lines are constant in all the clubs.

9. The golf club set according to claim 1, wherein when curvature radius R1 of edges of the face lines are defined as R1(1), R1(2), . . . , R1(n) in an order from the club having the smallest real loft angle L1, R1(1)≧

R1(2)≧

. . . ≧

R1(n) and R1(1)>

R1(n) are satisfied.

10. The golf club set according to claim 1, wherein the face lines are produced by forging, press processing, casting or cutting processing.

11. The golf club set according to claim 1, wherein the golf club set comprises a golf club having a real loft angle L1 of equal to or less than 40 degrees and a golf club having a real loft angle L1 exceeding 50 degrees.

12. The golf club set according to claim 1, wherein when a groove depth D1 of a club having the greatest real loft angle L1, among clubs having a real loft angle L1 of equal to or less than 40 degrees is defined as D1(X), and a groove depth D1 of a club having the smallest real loft angle L1, among clubs having a real loft angle L1 of equal to or greater than 50 degrees is defined as D1(Y), D1(X)<

D1(Y) is satisfied.

13. The golf club according to claim 1, wherein when a groove width W1 of a club having the greatest real loft angle L1, among clubs having a real loft angle L1 of equal to or less than 40 degrees is defined as W1(X), and a groove width W1 of a club having the smallest real loft angle L1, among clubs having a real loft angle L1 of equal to or greater than 50 degrees is defined as W1(Y), W1(X)<

W1(Y) is satisfied.

14. The golf club set according to claim 1, wherein the number n of the clubs is equal to or greater than 6.

7. A golf club set comprising n pieces of golf clubs (n is an integer of equal to or greater than 3),

wherein when groove depths D1 of face lines of the clubs are defined as D1(1), D1(2), . . . , D1(n) in an order from the club having the smallest real loft angle L1;

and

groove widths W1 of the face lines of the clubs measured by the 30 degree method of measurement are defined as W1(1), W1(2), . . . , W1(n) in an order from the club having the smallest real loft angle L1,

D1(1)≦

D1(2)≦

. . . ≦

D1(n) is satisfied;

the groove depths D1 of all the clubs are 0.0 (mm) or greater and 0.508 (mm) or less;

a ratio [D1(m)/D1(m−

1)] of the groove depths D1 between two golf clubs with adjacent club numbers in all the clubs is 1.0 or greater and 3.0 or less;

W1(1)≦

W1(2)≦

. . . ≦

W1(n) and W1(1)<

W1(n) are satisfied;

the groove widths W1 of all the clubs are 0.0 (mm) or greater and 0.889 (mm) or less; and

a ratio [W1(m)/W1(m−

1)] of the groove widths W1 between two golf clubs with adjacent club numbers in all the clubs is 1.0 or greater and 3.0 or less.