Golf club head
AssigneeDunlop Sports Co. Ltd.
InventorsHiroshi ABE, Tatsuhiko KUWABARA
Life of this patent
Estimating the term…
Abstract
It is an object of the present invention to provide a golf club head being lightweight and having a high strength. A head 2 includes a face 4, a sole 8, and a crown 6. The face 4 includes a face surface fs and a face back surface fr. A plurality of projections (A) are provided on the face back surface fr. The projections (A) are point-like in a planar view. An optional first direction and a second direction orthogonal to the first direction are defined in the planar view. Preferably, arrangement regularity of the projections (A) in the second direction is higher than arrangement regularity of the projections (A) in the first direction. Preferably, the first direction is a longitudinal direction; and the second direction is a lateral direction.
Claims13
A manufacturing method of a golf club head comprising the steps of:
- forging a face member;
- and
- joining the face member and another member,
- wherein the forging includes:
- a preceding forging step in which a plurality of projections (B) are formed on a face back surface;
- and
- a subsequent forging step in which a plurality of projections (A) lower than the projections (B) are formed by crushing the projections (B).
A manufacturing method of a golf club head comprising:
- a first step of producing a face member having a plurality of projections (A) on a face back surface;
- and
- a second step of joining the face member and another member,
- wherein the first step includes the steps of:
- forming a plurality of projections (B) on the face back surface, and
- forming the projections (A) lower than the projections (B) by crushing the projections (B).
A manufacturing method of a golf club head comprising:
- a first step of producing a face member having unevenness on a face back surface;
- and
- a second step of joining the face member and another member,
- wherein the first step includes a step of crushing the unevenness to decrease a height of the unevenness.
Dependencies are inferred from the claim text.