Patent ID: 9295887
Filing Date: 2016-03-29
CPC Classification: A63B

Claim Text:
1. An iron-type golf club head comprising: a top surface, a sole, a heel, and a toe, the top surface having a width of no greater than 7 mm and the sole having a width of no greater than 16 mm; a ball striking surface configured for striking a ball and having a ball striking area defining 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, wherein a leading edge is defined as a forward most surface connecting the sole and the ball striking face; and a rear surface opposite the ball striking surface, the rear surface having an upper blade portion and a lower muscle portion with the upper blade portion separated from the lower muscle portion by a blade interface, wherein the blade interface includes a first blade interface and a second blade interface intersecting the first blade interface at a convergence point, wherein the first blade interface extends generally parallel to the sole from the heel to the convergence point and the second blade interface extends upward from the convergence point to the toe, and further wherein the upper blade portion and the lower muscle portion extend across the rear surface from the heel to the toe and further with the upper blade portion extending from the top surface to the blade interface and with the lower muscle portion extending from the blade interface to the leading edge, wherein the upper blade portion has a generally uniform thickness from the heel to the toe of between approximately 6 mm and 8 mm, and the lower muscle portion has a thickness greater than the upper blade portion thickness, wherein the lower muscle portion thickness is between approximately 8 mm and 16 mm, and wherein the lower muscle portion has a height measured from the blade interface to the leading edge, and a toe average height of the lower muscle portion from the ball striking centerline to the toe-side boundary line is at least 50% greater than a heel average height of the lower muscle portion from the heel-side boundary line to the ball striking centerline.