Patent ID: 8801541

Claim:
A golf club, comprising: a golf club shaft; a golf club grip; and a golf club head, the golf club head comprising a body defining an interior cavity and comprising a sole positioned at a bottom portion of the golf club head, a crown positioned at a top portion, and a skirt positioned around a periphery between the sole and crown, wherein the body has a forward portion and a rearward portion; and a face positioned at the forward portion of the body, the face defining a striking surface having an ideal impact location at a golf club head origin, the head origin including an x-axis tangential to the face and generally parallel to the ground when the head is at a proper address position, a y-axis generally perpendicular to the x-axis and generally parallel to the ground when the head is at a proper address position, and a z-axis perpendicular to both the x-axis and y-axis, the striking surface having a striking surface height between approximately 45 mm and approximately 65 mm, and a striking surface width between approximately 75 mm and approximately 105 mm; wherein the golf club head has a moment of inertia about a golf club head center of gravity z-axis generally parallel to the head origin z-axis greater than approximately 490 kg·mm 2 , wherein the face has a thickness along the head origin x-axis, the thickness being between t min and t max for at least 50% of the x-axis coordinates x within a first range between approximately −10 mm and approximately −50 mm, and a second range between approximately 10 mm and approximately 50 mm, where t min =1.6+0.002378 (40−| x |) 2 , and (1) t max =2.5+0.002854 (40−| x |) 2 , (2) wherein the thickness at each coordinate of −10 mm and 10 mm along the x-axis is no less than 3.74 mm; and wherein the thickness at each coordinate of −40 mm and 40 mm along the x-axis is no greater than 2.5 mm; wherein the striking surface has an area greater than about 3,500 mm 2 , wherein the golf club has a club length between about 46 inches and 48 inches, and wherein the golf club has total mass between about 270 grams and about 300 grams.