Golf club head
AssigneeSRI Sports Limited
InventorTomoya Hirano
Life of this patent
Estimating the term…
Abstract
A golf club head comprises has an inner surface including a back surface of the face portion that is provided with a crown-side thick-walled rib and a sole-side thick-walled rib. The crown-side thick-walled rib includes an upper face rib disposed in the face portion and extending from the central thick-walled part to a peripheral edge of the back surface of the face portion on a crown portion side, and a crown rib disposed in the crown portion and extending backwardly of the head from the upper face rib. The sole-side thick-walled rib includes a lower face rib disposed in the face portion and extending from the central thick-walled part to a peripheral edge of the back surface of the face portion on a sole portion side, and a sole rib disposed in the sole portion and extending backwardly of the head from the lower face rib.
Claims4
A golf club head having a hollow structure comprising
- a face portion which has a face to hit a golf ball,
- a crown portion which connects to an upper edge of the face and forms a top surface of the head,
- a sole portion which connects to a lower edge of the face and forms a bottom surface of the head, and
- a side portion between the crown portion and the sole portion, which extends from a toe-side edge of the face to a heel-side edge of the face through a back face of the head, wherein
- the face portion is provided in a central region thereof with a central thick-walled part having a thickness of 3.1 to 4.2 mm, and
- an inner surface of the head including a back surface of the face portion is provided with a crown-side thick-walled rib and a sole-side thick-walled rib,
- the crown-side thick-walled rib including
- an upper face rib which is disposed in the face portion and extends from the central thick-walled part to a peripheral edge of said back surface of the face portion on a crown portion side, and
- a crown rib which is disposed in the crown portion and extends backwardly of the head from the upper face rib, and
- the sole-side thick-walled rib including
- a lower face rib which is disposed in the face portion and extends from the central thick-walled part to a peripheral edge of the back surface of the face portion on a sole portion side and
- a sole rib which is disposed in the sole portion and extends backwardly of the head from the lower face rib,
- wherein the following expressions are satisfied:
- Tc≧Tru,
- Tc≧Trd,
- Wc≧Wru, and
- Wc≧Wrd,
- wherein
- Tc is a thickness of the central thick-walled part,
- Wc is a maximum width of the central thick-walled part in the toe-heel direction,
- Wru is a width of the crown-side thick-walled rib in the toe-heel direction,
- Wrd is a width of the sole-side thick-walled rib in the toe-heel direction,
- Tru is an average thickness of the crown-side thick-walled rib, and
- Trd is an average thickness of the sole-side thick-walled rib.
A golf club head having a hollow structure comprising
- a face portion which has a face to hit a golf ball,
- a crown portion which connects to an upper edge of the face and forms a top surface of the head,
- a sole portion which connects to a lower edge of the face and forms a bottom surface of the head, and
- a side portion between the crown portion and the sole portion, which extends from a toe-side edge of the face to a heel-side edge of the face through a back face of the head,
- wherein
- the face portion is provided in a central region thereof with a central thick-walled part having a thickness of 3.1 to 4.2 mm, and
- an inner surface of the head including a back surface of the face portion is provided with a crown-side thick-walled rib and a sole-side thick-walled rib,
- the crown-side thick-walled rib including
- an upper face rib which is disposed in the face portion and extends from the central thick-walled part to a peripheral edge of said back surface of the face portion on a crown portion side, and
- a crown rib which is disposed in the crown portion and extends backwardly of the head from the upper face rib, and
- the sole-side thick-walled rib including
- a lower face rib which is disposed in the face portion and extends from the central thick-walled part to a peripheral edge of the back surface of the face portion on a sole portion side and
- a sole rib which is disposed in the sole portion and extends backwardly of the head from the lower face rib,
- wherein in a reference state in which the club head is set on a horizontal plane at its lie angle and loft angle, the crown rib is disposed on one side of a vertical plane, and the sole rib is provided on the other side of the vertical plane,
- wherein the vertical plane is defined as including a sweet spot of the face and being parallel with the front-back direction of the head.
Dependencies are inferred from the claim text.