Patent ID: 9623300
Date: 2017-04-18
CPC Classifications: A63B

Claim:
1. A iron-type golf club head comprising: a top surface, a sole, a heel, and a toe; a ball striking surface having a ball striking area, wherein the ball striking area defines a heel-side boundary line, a toe-side boundary line, and a ball striking centerline located equidistant from the heel-side boundary line and the toe-side boundary line; and a rear surface opposite the ball striking surface, the rear surface having a muscle portion extending from the heel to the toe; an interface surface adjacent an upper edge of the muscle portion; wherein the interface surface having a first interface surface extending from the heel of the iron-type golf club head to a convergence point and a second interface surface extending from the convergence point to the toe of the iron-type golf club head, wherein the first interface surface and the second interface surface form an interface angle at the convergence point, wherein the interface angle is an obtuse angle, and further wherein the sole has a width between 10 mm and 19 mm measured between the heel-side boundary line and the toe-side boundary line.