Karsten Manufacturing Corporation

Daniel J Kubica

John A Solheim

David E Wright

Michael R Nicolette

Lou C Beebe

Gary L Tuerschmann

Richard R Sanchez

Randall B Noble

Parvaneh Kazemi-Tabrizi

A golf club head composed of a forged metal material has a striking surface that is supported by diagonal stiffening regions that extend from a central region of the face toward the heel-sole quadrant, heel-crown quadrant, toe-crown quadrant, and toe-sole quadrants of the face. The diagonal stiffening regions are smoothly contoured to blend into the back surface of the face so as to avoid any stress concentrations. By extending the stiffening regions diagonally from the center of the club face to the four quadrants, a more uniform stress distribution can be obtained and therefore more uniform performance. Additionally, since the diagonal stiffening regions are greater in length than vertical or horizontal stiffening region could be made, the center of the face can deflect a greater amount without exceeding the yield strength of the material and, therefore, there is a more efficient transfer of energy from the club head to the ball.

Golf club with diagonally reinforced contoured front wall

A golf club is comprised of a head including a hollow body having a top wall, a bottom wall, and a front wall arranged for impacting a golf ball. A bore is disposed in the head adjacent a heel end thereof behind the body front wall extending downwardly from the body top wall toward the body bottom wall. A hosel having a generally lengthwise passage is inserted into the bore. The hosel passage is oriented at a predetermined angle relative to a longitudinal axis of the bore, and a tip end of a shaft is received in the hosel passage so that the shaft is disposed at a desired orientation with respect to the head. The hosel is selected from a plurality of hosels with passages disposed at different predetermined angles relative to the bore longitudinal axis. This allows adjustment of the desired orientation of the shaft so that the golf club may be custom fit to a particular golfer.

Golf club with different shaft orientations and method of making same

A golf club head includes a body with a top wall, a bottom wall, and a front wall arranged for impacting a golf ball. The front wall has an inner surface and an outer surface. The front wall varies in thickness and has a bulging area of increased thickness on its inner surface. The bulging area of increased thickness includes a generally ring shaped mass that projects rearwardly from the front wall. A generally cone shaped mass, that also projects rearwardly from the front wall, may be located inside the ring shaped mass.

Golf club head with variable thickness front wall

Golf club head

An iron type golf club head includes a body having a front face arranged for impact with a golf ball, a back face, a heel portion and toe portion. A perimeter weighting element protrudes rearwardly from the front face and defines a primary cavity in the back face of the body. The perimeter weighting element includes a top rail and a sole which extend between the body heel and toe portions along an upper portion and a lower portion, respectively, of the body. An interior wall extends from a first end located adjacent the body heel portion through the primary cavity between the top rail and the sole to a second end located adjacent the body toe portion. The interior wall defines a secondary cavity within the primary cavity, and a weight adjustment member is disposed in the secondary cavity. The weight adjustment member is selected from a plurality of weight adjustment members and is used to overcome manufacturing tolerances and to adjust golf club swingweights.

Iron type golf club head with weight adjustment member

A golf club head includes a front face arranged for impact with a golf ball, a heel portion and a toe portion. A hosel has a neck connected to the heel portion of the body. The hosel contains a bore for receiving one end of a golf club shaft, and the bore has a desired orientation relative to the body. The hosel neck has an upper surface and a lower surface, and a notch is formed in the lower surface of the hosel neck. The notch has a depth that varies along its length. A critical dimension measured between the upper surface of the hosel neck and a point on the depth of the notch is less than the outside diameter of the hosel. This permits the desired orientation of the bore to be adjusted by bending the hosel neck at the notch.

Golf club head with loft and lie adjustment notch

Heel notch for a golf club head

Hosel for a golf club head

Cavity insert for a golf iron head

A golf club head having a heel end and toe end includes a hollow body with a top wall, a bottom wall, a side wall connecting the top and bottom walls and a front wall arranged for impacting a golf ball. The front wall of the body varies in thickness in two planes including a first plane that is disposed substantially horizontally between the top and bottom walls of the body and a second plane that is disposed substantially vertically between the heel and toe ends of the head. The body front wall has increased thickness along an axis where the two planes intersect. The increased thickness of the front wall decreases in four directions including a first direction extending from this axis toward the body top wall, a second direction extending from this axis toward the body bottom wall, a third direction extending from this axis toward the head heel end, and a fourth direction extending from this axis toward the head toe end.

Growing community of inventors

Phoenix, AZ, United States of America

Daniel J Kubica