Patent ID: 8480507

Claim:
A set of iron-type golf clubs comprising at least two iron-type golf clubs with iron-type golf club heads, wherein at least one of the two iron-type golf club heads includes: a first type of iron-type golf club head, which includes: a ball striking face; a golf club head body; a perimeter weighting member extending in a direction rearwardly from the ball striking face and along at least a portion of a circumferential area of the golf club head body; a recessed interior region of the golf club head which is defined by the perimeter weighting member and which is interior relative to the perimeter weighting member; a wall which is set back from a rear edge of the perimeter weighting member and which extends within the interior region of the golf club head body between inner edges of the perimeter weighting member in the toe to heel direction and upwards from a sole of the golf club head to cover at least a quarter of the interior region of the golf club head defined within the perimeter weighting member; and a slot contained within the recessed interior region defined by the perimeter weighting member, wherein the slot is positioned behind the ball striking face and defined by the ball striking face and the wall; wherein at least one of the two iron-type golf club heads includes: a second type of iron-type golf club head, which includes: a ball striking face; a golf club head body; a perimeter weighting member extending in a direction rearwardly from the ball striking face and along at least a portion of a circumferential area of the golf club head body; a recessed interior region of the golf club head which is defined by the perimeter weighting member and which is interior relative to the perimeter weighting member and includes: a notch in the recessed interior region of the golf club head which extends through at least an upper quarter of the recessed interior region and positioned behind the ball striking face of the golf club head; and a lower section of the interior region which is includes the remaining portion of the recessed interior region and is solid and thicker than the area defined by the notch, wherein the boundary between the notch and the lower region is defined by a ledge that extends within the interior region of the golf club head body between inner edges of the perimeter weighting member in the toe to heel direction, wherein the perimeter weighting member is tapered in the direction of the ball striking face of the golf club head and at least a section of the perimeter weighting member is tapered such that it exhibits a ledge which is angled at an angle which is different from the angle at which the remainder of the tapered section of the perimeter weighting member extends in the direction of the ball striking face of the golf club head; wherein the boundary extends generally along the line as the ledge of the perimeter weighting member.