Patent ID: 7878920

Claim:
A set of iron-type golf clubs, comprising: a first golf club including a first golf club head having a first loft angle, a ground contact that is about co-planar with a first center of gravity of the golf club in a vertical plane extending in a heel-toe direction, and a first sole camber in a face to back direction having a first radius of curvature; a second golf club including a second golf club head having a second loft angle that is greater than the first loft angle, a ground contact that is about co-planar with a second center of gravity of the second golf club head in a vertical plane extending in a heel-toe direction, and a second sole camber in a face to back direction having a second radius of curvature that is greater than the first radius of curvature; and a third golf club including a third golf club head having a third loft angle that is greater than the second loft angle, a ground contact that is about co-planar with a third center of gravity of the third golf club head in a vertical plane extending in a heel-toe direction, and a third sole camber in a face to back direction having a third radius of curvature that is greater than the second radius of curvature, wherein the first golf club, the second golf club and the third golf club each have an effective bounce of 1.0°-15.0° based on a non-compressible planar ground surface with said golf clubs oriented with the designed loft and lie angles relative to the ground plane; wherein the first golf club has a first traditional bounce that is negative and the third golf club has a third traditional bounce that is positive.