Golf club head
AssigneeBridgestone Sports Co., Ltd.
InventorsKozue Wada, Hideo Matsunaga
Life of this patent
Estimating the term…
Abstract
A face portion of a golf club head includes first to fourth main ribs on an inner surface of the head. The first main rib extends from a center portion of the face portion toward a crown, and the second main rib extends from the center portion toward a sole. The face portion is formed to have such a thickness that the center portion, the first main rib, and the second main rib become thinner in this order. The third and fourth main ribs extend from the center portion in outward directions of the face portion.
Claims20
A golf club head having a hollow structure, comprising:
- a face portion having a ball hitting surface;
- and
- at least four main ribs disposed on an inner surface of the face portion,
- wherein among the four main ribs, a first main rib extends from a center portion of the face portion toward a crown, a second main rib extends from the center portion toward a sole, and the other two main ribs also extend from the center portion toward the outside of the face portion, and
- the face portion is formed to have such a thickness of the center portion that is thicker than a thickness of the first main rib, which is thicker than a thickness of the second main rib, and
- the first main rib is convexly curved toward a heel side of the head and the second main rib is convexly curved toward a toe side of the head.
A golf club head having a hollow structure, comprising:
- a face portion having a ball hitting surface;
- at least four main ribs disposed on an inner surface of the face portion, each of the at least four main ribs having a substantially constant width;
- and
- a reinforcement rib disposed on the inner surface of the face portion
- wherein among the four main ribs, a first main rib extends from a center portion of the face portion toward a crown, a second main rib extends from the center portion toward a sole, a third main rib extends from the center portion toward a hosel, and a fourth main rib extends from the center portion toward a portion, closer to a toe, of the sole, and
- wherein the reinforcement rib extends toward the outside of the face portion from the center portion, the reinforcement rib having a thickness gradually reduced from the center portion in the outward direction and having a width gradually reduced from the center portion in the outward direction.
Dependencies are inferred from the claim text.