Abstract: Disclosed is a metal wood club head with a body having a crown a sole, a skirt and a strike face. The sole has a first cavity located rearwards and towards the heel of the club head and a second cavity located rearwards towards the toe of the club head and approximately opposite of the first cavity. The two cavities define a relatively flat ridge or land area extending from the front of the sole rearwards which forms a beam-like stiffening structure. A backweight may be attached to the body portion to redistribute mass more rearwardly in the club head and directly behind the stiffening ridge. The redistribution of the mass rearwards increases the dynamic loft and moment of inertia of the club head and its position behind the stiffening ridge enhances energy transfer upon striking of a ball. The disclosed club head is thus provided with an increased moment of inertia to resist rotation and enhanced striking efficiency without an increase in club volume.

Abstract: There is disclosed a hollow reinforced metal golf club head in the shape of a driver. The golf club head is reinforced by at least one rib and preferably three ribs each of which extends along or between the internal surface of the striking face and the intemal surface of the top side to reinforce both the striking face and the top side. In addition, the top side has a pattern of corrugated reinforcing protrusions, preferably in the shape of gear teeth, extending rearwardly from adjacent the striking face. The sole of the club head has at least one ridge, and preferably three ridges, each of which extends along more than half the length of the sole and terminates short of the striking face and short of the back side.

Abstract: There is disclosed a hollow reinforced metal golf club head in the shape of a driver. The golf club head is reinforced by at least one rib and preferably three ribs each of which extends along or between the internal surface of the striking face and the internal surface of the top side to reinforce both the striking face and the top side. In addition, the top side has a pattern of corrugated reinforcing protrusions, preferably in the shape of gear teeth, extending rearwardly from adjacent the striking face. The sole of the club head has at least one ridge, and preferably three ridges, each of which extends along more than half the length of the sole and terminates short of the striking face and short of the back side.

Abstract: A golf iron head comprising a heel, a toe, a sole, a planar striking face, a backside, a top, a center of mass, and a hosel for connecting to a shaft, wherein the angle formed by the planar striking face and the face of the toe is greater than 90 degrees, the toe side of the club between the striking face and the backside extending back and outwardly away from the heel to a barkside point outermost from the center of mass (compared longitudinally).

Abstract: There is disclosed a set of golf irons which have progressively decreasing displacements between the axis of the shaft and the center of mass projected to the horizontal plane beginning with the long irons and progressing to the short irons. Each iron in the set also has a support column behind the striking face, parabolic shaped horizontal grooves in the striking face, and a flat segment on the sole.

Abstract: There is disclosed a set of golf irons which have progressively decreasing displacements between the axis of the shaft and the center of mass projected to the horizontal plane beginning with the long irons and progressing to the short irons. Each iron in the set also has a support column behind the striking face, parabolic shaped horizontal grooves in the striking face with a top junction between the striking face and each groove, the top junction and groove sides defined by a segment of a parabola, the longest groove length in the striking face of each club proportional to the club displacement, and a flat segment on the sole.

Abstract: There is disclosed a set of golf irons which have progressively decreasing displacements between the axis of the shaft and the center of mass projected to the horizontal plane beginning with the long irons and progressing to the short irons. Each iron in the set also has a support column behind the striking face, parabolic shaped horizontal grooves in the striking face, and a flat segment on the sole centered below the center of mass to cause the head to sit squarely at address. The flat segment is progressively positioned below the center of mass so that the flat segment is closer to the leading edge for the long irons than it is for the short irons.

Abstract: There is disclosed a set of golf irons which have progressively decreasing displacements between the axis of the shaft and the center of mass projected to the horizontal plane beginning with the long irons and progressing to the short irons. Each iron in the set also has a support column behind the striking face, parabolic shaped horizontal grooves in the striking face, and a flat segment on the sole.