Patent ID: 7704155

Claim:
A golf club having a shaft, a grip, a hosel and a club head, the club head comprising: a body having a face, a sole, a crown and a skirt joining the face, sole and crown, wherein the sole has a varying relief closer to a toe of the club head and wherein the sole meets the ground plane at one predetermined contact area, wherein said contact area is located on or toe-ward of the line that projects from the tip of the grip through center of gravity of the club wherein the contact area comprises a sphere segment disposed to the sole, and wherein the body has a coordinate system with an y-axis located horizontal to the club face, a x-axis located vertical to the club face, and a z-axis located through the club face, and wherein the sphere segment is located on the sole such that the center of the sphere defined by the sphere segment is located away from the geometric center of the face of the club head by about 0.5 mm in the y-direction toward the toe of the club head, about 7.5 mm in the x-direction toward the sole of the club head, and about 26 mm in the z-direction away from the face of the club head.