Patent 8657703 was granted and assigned to Bridgestone on February, 2014 by the United States Patent and Trademark Office.
This invention provides a hollow golf club head including a face portion, a crown portion, and a sole/side portion including a sole portion and a side portion. This golf club head includes a rib which extends from the toe side to the heel side in the sole portion, and a weight portion which is provided in the sole portion on the side of the face portion with respect to the rib or the back side with respect to the rib, and increases the amplitude of vibration of the sole portion.