Golf club with low density and high inertia head

Abstract

Abstract The golf club has a head of composite construction which includes a specially configured metal insert encased in a plastic matrix. The insert comprises an aluminum or magnesium face plate, relatively thin corrugated ribs or plates on the same metal extending rearwardly therefrom, and a transversely disposed block of lead cast onto the rear ends of the ribs or plates, the lead block containing therein a stack of individually removable heavy discs, preferably of a tungsten alloy, that further increases the mass at the rear of the insert. The face plate and corrugated plates, which are of aluminum or magnesium, constitute a relatively low density metal, but the plastic matrix, which is molded about the insert, is of a much lower density, the plastic constituting rigid or structural foamed polyurethane. The ribs or plates, which are corrugated to achieve a high stiffness-to-weight ratio, are perpendicular to the face plate for the purpose of transmitting energy from the face plate to the rearwardly disposed heavy mass composed of the lead block and tungsten-containing discs. Access to the heavy discs is had in one embodiment via the back side of the club head and in a second embodiment via the bottom sole plate so that the mass can be changed, either by adding or removing the appropriate number of discs.

Inventors

• 👤 Gordon W. Nygren

Bibliographic Details