Patent ID: 8328663
Filing Date: 2012-12-11
Classification: A63B,B23P,Y10T

Abstract:
1. A hollow iron-type golf club head comprising: a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face having an unsupported face area of between about 300 mm2 to about 4,000 mm2; a back wall in the rear portion enclosing a substantial portion of the rear portion to create a substantially enclosed cavity, the enclosed cavity being defined by at least a rear surface of the striking face, an inner back wall surface, and the sole portion; at least one plug located within the enclosed cavity, the at least one plug being compressed between the rear surface of the striking face and the back wall in the rear portion; wherein the unsupported face area includes a thickened central region; and wherein the at least one plug is positioned to be in contact with at least a portion of the thickened central region; wherein the back wall includes at least a first aperture, the first aperture being configured to allow the at least one plug to be inserted into the first aperture and is configured to allow the at least one plug to move from a first position to a second position; and wherein the back wall includes at least one slot, the at least one slot being connected to the first aperture and is configured to secure the at least one plug.