Golf club head
AssigneeSumitomo Rubber Industries, Ltd.
InventorYuki Shimahara
Life of this patent
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Abstract
An iron-type golf club head comprises a face having a striking surface, a back surface, and a face thickness defined therebetween. The back surface is provided with a cavity cavity-forming portion dented toward the striking surface. The cavity cavity-forming portion is provided with a protuberance in which the face thickness is partially increased, and which extends in the top-bottom direction of the head. In the cross section of the face perpendicular to the striking surface and parallel to the toe-heel direction, the protuberance has: a ridge at which the face thickness is largest in the protuberance; and a pair of inclined surfaces extending from the ridge toward a toe side and heel side of the cavity cavity-forming portion while decreasing the face thickness.
Claims13
An iron-type golf club head comprising:
- a face having a striking surface and a back surface opposite to the striking surface, and having a face thickness defined between the striking surface and the back surface, wherein
- the back surface is provided with a cavity-forming portion dented toward the striking surface,
- the cavity-forming portion is provided with a protuberance in which the face thickness is partially increased,
- the protuberance extends in a top-bottom direction of the head, and
- the protuberance has a ridge and a pair of inclined surfaces, wherein, in a cross section of the face orthogonal to the striking surface and parallel to a toe-heel direction of the head,
- the face thickness measured at the ridge is largest in the protuberance,
- one of the inclined surfaces extends toward a toe of the head from the ridge while decreasing the face thickness, and
- the other of the inclined surfaces extends toward a heel of the head from the ridge while decreasing the face thickness,
- wherein
- the back surface is provided with a frame portion surrounding the cavity-forming portion,
- the frame portion includes a top side frame portion, a sole side frame portion, and an expansion portion extending toward a center of the face from the sole side frame portion,
- the face thickness measured at the expansion portion is larger than the face thickness measured at the protuberance,
- the protuberance has a top-side end connected to the top side frame portion and a sole-side end connected to the expansion portion,
- the protuberance has a toe-side edge and a heel-side edge, and has a width measured in the head toe-heel direction from the heel-side edge to the toe-side edge,
- the expansion portion has a width in the head toe-heel direction which is larger than the width of the protuberance, and the expansion portion extends further towards the toe than the toe-side edge of the protuberance and further towards the heel than the heel-side edge of the protuberance, and
- the one of the inclined surfaces and the other of the inclined surfaces intersect so as to form a single ridge line defining the ridge, and the ridge line extends from the top side frame portion to the expansion portion.
Dependencies are inferred from the claim text.