Abstract: A golf club head having a cavity back design with a recess therein for placement of a lightweight polymer material. The club head having a back surface of a club face. The polymer material only bonded to the recess by its perimeter with a predetermined void between the polymer and the back surface of the club face. The lightweight material allows for a larger club head and consequently a bigger sweet spot without increasing the overall weight of the club head. Unwanted vibrations caused upon the club head hitting a golf ball are dampened by a spring/mass system. The polymer material serves as the spring and a decorative medallion, which is attached only to the polymer and not the club head, provides the mass. Vibrations created by contact between club head and golf ball are dampened in accordance to material characteristics of the selected polymer.

Abstract: A set of golf club irons with improved vibration damping and weight distribution, each golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A set of golf club irons with improved vibration damping and weight distribution, each golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A golf club head having a cavity back design with a recess therein for placement of a lightweight polymer material. The club head having a back surface of a club face. The polymer material only bonded to the recess by its perimeter with a predetermined void between the polymer and the back surface of the club face. The lightweight material allows for a larger club head and consequently a bigger sweet spot without increasing the overall weight of the club head. Unwanted vibrations caused upon the club head hitting a golf ball are dampened by a spring/mass system. The polymer material serves as the spring and a decorative medallion, which is attached only to the polymer and not the club head, provides the mass. Vibrations created by contact between club head and golf ball are dampened in accordance to material characteristics of the selected polymer.

Abstract: A golf club with improved vibration damping and weight distribution, the golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A set of golf club irons with improved vibration damping and weight distribution, each golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A golf club with improved vibration damping and weight distribution, the golf club comprising a shaft and a head comprising a body portion having a front portion and a back portion, wherein the body portion defines an upper aperture and a lower aperture extending through the body portion communicating with the front portion and the back portion.

Abstract: A golf clubhead having a cavity back design and a three piece construction. The clubhead body portion includes a strike face insert cavity for receiving a strike face insert and further includes a central aperture. An additional recess is formed within the strike face insert cavity and may receive vibration dampening material. The sizes of the strike face insert cavity, vibration dampening insert recess and aperture may be progressively varied, or varied in other desirable manners in accordance with the particular golf club characteristics, to improve weight distribution and/or vibration dampening and to increase strike face surface area.