Patent ID: 7976403
Filing Date: 2011-07-12
Classification: A63B

Abstract:
1. An iron-type golf club, comprising: a hosel; a front wall including a hitting face; a back portion; and a lightweight insert, wherein the back portion comprises only an upper blade portion and a lower muscle portion, said entire upper blade portion being defined as a non-perimeter weighted blade-type iron structure from a top end to a bottom end of the upper portion, said muscle portion extending from the upper blade portion and being substantially thicker than the upper blade portion, wherein the golf club further comprises at least two heavyweight inserts having higher density than a density of the front wall and a density of the back portion, wherein the heavyweight inserts are located on heelward and toeward sides of the geometric center of the hitting face, the lightweight insert having a density lower than the density of the front wall and the density of the back portion, wherein the lightweight insert is positioned only within the muscle portion.