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US 8,409,029 B2Granted
Golf club set
AssigneeSRI Sports Limited
InventorHiroshi Abe
Life of this patent
Estimating the term…
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.
Claims11
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) 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, and
- a roundness of curvature radius R1 is applied to the edges of face lines in the clubs, the curvature radius R1 being equal to or greater than 0.10 mm and equal to or less than 0.50 mm,
- 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 and a golf club having a real loft angle L1 of equal to or greater than 50 degrees;
- 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, wherein the groove depths D1 in club numbers having a real loft angle L1 of equal to or greater than 20 degrees and equal to or less than 39 degrees are constant and groove depths D1 in club numbers having a real loft angle L1 of equal to or greater than 44 degrees and equal to or less than 56 degrees are constant.
7 more elements
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)≦ . . . ≦W(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, and
- a roundness of curvature radius R1 is applied to the edges of face lines in the clubs, the curvature radius R1 being equal to or greater than 0.10 mm and equal to or less than 0.50 mm,
- 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 and a golf club having a real loft angle L1 of equal to or greater than 50 degrees;
- 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, wherein the groove depths D1 in club numbers having a real loft angle L1 of equal to or greater than 20 degrees and equal to or less than 39 degrees are constant and groove depths D1 in club numbers having a real loft angle L1 of equal to or greater than 44 degrees and equal to or less than 56 degrees are constant.
7 more elements
Dependencies are inferred from the claim text.