Patent ID: 8435132

Claim:
A set of iron type golf clubs comprising at least two iron type golf clubs including a 9-iron club with iron type golf club head bodies wherein each of the iron type golf club head bodies has a different center of gravity, each of the iron type golf club head bodies includes a ball striking face, a crown portion, a sole portion, a heel portion, a toe portion and a rear surface opposite the ball striking face including a perimeter weighting member extending rearward from the ball striking face and along at least a portion of a circumferential area of the golf club head body, a cavity in the rear portion of the golf club head body, and a weight member which is selectively shaped to provide the respective center of gravity of each golf club head body at a particular position, wherein each of the weight members includes: a base portion that extends from the perimeter weighting member, an upper heel side portion that extends from the base portion, and an upper toe side portion which extends from the base portion, wherein the shape of the weight members varies successively throughout the set of the golf clubs to shift the center of gravity from a position closer to the heel in club head bodies with a low degree of loft relative to the set of club head bodies to a position closer to the toe for club head bodies with a high degree of loft relative to the set of club head bodies, wherein the weight member extends from the perimeter weighting member into a cavity in the rear portion of the golf club head body and is positioned in the cavity of the golf club head body separate and away from a rear surface of the golf club head body defined by a cavity in a rear portion of the golf club head body, wherein a thickness of the upper heel side portion and a thickness of the upper toe side portion varies throughout the set of the golf clubs to shift the center of gravity from a position closer to the heel in club head bodies with a low degree of loft relative to the set of club head bodies to a position closer to the toe for club head bodies with a high degree of loft relative to the set of club head bodies, wherein the distance between the weight member and the respective face of the golf club head varies throughout the set of the golf clubs to shift the center of gravity towards or away from the respective face of the golf club head.