Patent ID: 7134971
Filing Date: 2006-11-14
Classification: A63B

Abstract:
1. A golf club having a shaft and a head secured to the shaft, the head comprising: a primary element at least partially formed of a first material, the primary element defining a first surface and an opposite second surface, the first surface providing an area for engaging a golf ball, and substantially all of the first surface being formed from the first material; a cavity defined by a portion of the primary element that is of unitary construction, the cavity being positioned between the first surface and the second surface, at least a portion of the cavity extending in a direction that is substantially parallel to the first surface; at least one depression that is defined by the primary element and extends toward the second surface front the cavity; and an insert element formed of a second material and positioned within the cavity, the insert element including at least one protrusion extending into the depression, and the second material being different than the first material, the second material having a lesser density than the first material.