Set of golf clubs
First Claim
1. A set of golf clubs including a number of golf clubs numbered serially and having a gradually increasing loft angle from long irons to short irons, wherein the improvement comprises arranging angles of corner portions formed by a striking face and groove slope faces in a cross-section of a number of face line grooves extending across the striking face to decrease, while arranging the face line grooves with groove widths which increase within a range from 0.3 mm to 0.9 mm, progressively from the long irons to the short irons.
2 Assignments
0 Petitions
Accused Products
Abstract
A set of golf clubs including a number of golf clubs which are numbered serially and having progressively increasing loft angles from long irons to short irons. In a cross section of a number of face line grooves arranged on a striking face, the striking face and a groove slope face form a corner portion having a cross-sectional angle which decreases gradually from the long irons to the short irons.
100 Citations
6 Claims
- 1. A set of golf clubs including a number of golf clubs numbered serially and having a gradually increasing loft angle from long irons to short irons, wherein the improvement comprises arranging angles of corner portions formed by a striking face and groove slope faces in a cross-section of a number of face line grooves extending across the striking face to decrease, while arranging the face line grooves with groove widths which increase within a range from 0.3 mm to 0.9 mm, progressively from the long irons to the short irons.
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2. A set of golf clubs including a number of golf clubs numbered serially and having a gradually increasing loft angle from long irons to short irons, wherein the improvement comprises arranging angles of corner portions formed by a striking face and groove slope faces in a cross-section of a number of face line grooves extending across the striking face to decrease, while arranging the face line grooves with groove widths which increase within a range from 0.3 mm to 0.9 mm, by stages from the long irons to the short irons.
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3. A set of golf clubs including a number of golf clubs numbered serially and having a gradually increasing loft angle from long irons to short irons, wherein the improvement comprises arranging angles of corner portions formed by a striking face and groove slope faces in a cross-section of a number of face line grooves extending across the striking face to decrease, while arranging the face line grooves with groove widths which increase within a range from 0.3 mm to 0.9 mm, progressively and by stages from the long irons to the short irons.
Specification