A golf club head including a club head body including a back portion and a striking face, wherein the striking face comprises a front surface configured to strike a golf ball and a rear surface opposite the front surface, wherein the back portion is spaced from the rear surface, a first deformable member residing between the back portion and the rear surface of the striking face, wherein the first deformable member comprises a front surface in contact with the rear surface of the striking face, and a second deformable member residing between the back portion and the rear surface of the striking face, wherein the second deformable member comprises a front surface in contact with the rear surface of the striking face, wherein the first deformable member has a greater Shore A durometer than the second deformable member.

The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and significant tungsten weight members at the heel and toe.

Iron-type golf club heads are disclosed having a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The iron-type golf club heads include a flexible boundary structure (FBS) that is provided at one or more locations on the club head. The flexible boundary structure may comprise, in several embodiments, a slot, a channel, a gap, a thinned or weakened region, or other structure that enhances the capability of an adjacent or related portion of the golf club head to flex or deflect and to thereby provide a desired improvement in the performance of the golf club head.

The present invention generally relates to sets of iron golf clubs, and more particularly, to sets of iron golf clubs that are comprised of significant tungsten weighting to maximize the MOI about an axis through the CG that is parallel to the shaft axis.

A golf club head includes a body having a heel portion, a toe portion, a sole portion, and an outer surface, a strikeface having a geometric center, a head center of gravity, and a weight member including a weight pad. The weight member is configured to be repositionable by the user to a first position or a second position. The club head having the weight member in the first position shifts the head center of gravity toward the strikeface, and the club head having the weight member in the second position shifts the head center of gravity away from the strikeface.

Some embodiments include a club head for adjusting vertical spin of a golf ball. Other embodiments of related systems and methods are also disclosed.

The invention relates to a method for adjusting a series of golf clubs each comprising a shaft, a head at the proximal end of the shaft and a grip at the distal end of the shaft; said method comprising the following steps: adjusting the mass of the head of each golf club and/or, adjusting the mass of the shaft near the distal end of the shaft, such that each golf club has a substantially identical moment of inertia; then adjusting the mass of the grip of each golf club and/or adjusting the mass of the shaft near the proximal end of the shaft, such that each golf club has a substantially identical swingweight. The invention also relates to a series of golf clubs adjusted using the method according to the invention.

A golf club set includes a plurality of golf clubs 1 having different loft angles. The golf clubs 1 include at least one 1st golf club 1A having a loft angle of less than 34 degrees, and at least one 2nd golf club 1B having a loft angle of not less than 34 degrees. Each of the at least one 1st golf club 1A and the at least one 2nd golf club 1B comprises a clubface 3 provided with a plurality of face grooves 8 having a depth. The depth of the face grooves 8 of the at least one 2nd golf club 1B is larger than the depth of the face grooves 8 of the at least one 1st golf club 1A.

A golf club shaft system and golf club shaft possessing unique flexural and torsional rigidity profiles, while providing significant adjustability to fine tune the shaft to a particular golf swing.

A golf club head including a club head body including a back portion, a striking face, and an interior cavity formed between the back portion and the striking face, wherein the striking face comprises a front surface configured to strike a golf ball and a rear surface opposite the front surface, a deformable element residing between the back portion and the rear surface of the striking face, wherein the deformable element comprises a front surface in contact with the rear surface of the striking face, wherein an aperture is formed through the back portion; and an adjustment driver residing within the aperture, the adjustment driver including a recess adjacent the interior cavity, wherein the deformable element resides within the recess, wherein the back portion comprises a shelf surrounding the aperture, wherein the adjustment drive comprises a flange, the flange in contact with the shelf.