Golf club head
First Claim
1. A hollow golf club head made of metal comprising:
- a face portion;
a sole portion;
a side portion; and
a crown portion, wherein a metal material forming the crown portion has a lowest Young'"'"'s modulus.
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Accused Products
Abstract
A golf club head has a face portion, a crown portion, a sole portion, a side portion and a hosel portion. Each portion is made of titanium or a titanium alloy. The side portion is formed integrally entirely from its toe side to its back side and its heel side. The side portion and the hosel portion are cast integrally. The face portion, the crown portion and the sole portion are molded separately from one another. The face portion, the crown portion, the sole portion and the side portion are welded integrally so as to form a golf club head. The Young'"'"'s modulus of the crown portion is lower than any Young'"'"'s modulus of the face portion, the sole portion, the side portion and the hosel portion.
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Citations
20 Claims
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1. A hollow golf club head made of metal comprising:
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a face portion;
a sole portion;
a side portion; and
a crown portion, wherein a metal material forming the crown portion has a lowest Young'"'"'s modulus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A hollow golf club head made of metal comprising:
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a face portion;
a sole portion;
a side portion; and
a crown portion, which is not subjected to heat treatment, wherein the portions other than the crown portion are welded and are subjected to heat treatment, and then the portions and the crown portion are welded. - View Dependent Claims (12, 13, 14, 15)
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16. A method for manufacturing A hollow golf club head made of metal including a face portion, a sole portion, a side portion, and a crown portion, the method comprising the steps of:
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welding the portions other than the crown portion;
heat-treating the portions; and
welding the portions and the crown portion, which is not subjected to a heat treatment. - View Dependent Claims (17, 18, 19, 20)
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Specification