Patent ID: 9597562
Date: 2017-03-21
CPC Classifications: A63B

Claim:
1. An iron-type golf club head comprising: a heel, a toe, a sole, a top-line of the iron-type club head, a striking face having a forward-facing ball-striking surface, a rearward-facing surface, and an ideal striking location; and a perimeter weight surrounding the striking face; wherein the striking face has a supported region supported by the perimeter weight and an unsupported region, with the ideal striking location lying within the unsupported region, the unsupported region having a thickness that varies in a heel-toe direction; wherein a heel portion of the unsupported region of the striking face is located on a heel side of an imaginary vertical plane that extends perpendicularly to the ground plane and that contains an imaginary line that extends in a direction normal to the striking face at the ideal striking location when the clubhead is in the normal address position, and wherein a toe portion of the unsupported region of the face is located on a toe side of the imaginary plane; wherein the clubhead has a relative coefficient of restitution of at least −0.030; and wherein the following two inequalities are satisfied: wherein: SA SA E E and N and M have values determined by discretizing SA