Patent ID: 11890516
Assignee: TAYLOR MADE GOLF COMPANY, INC.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 13:
14. An iron-type golf club head, comprising:
a body, comprising a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, and a rear portion, wherein the rear portion comprises a rear opening and a sole bar, the rear opening having a total area of at least 400 mm{circumflex over ( )}2, and wherein the front portion comprises a strike face and a back surface opposite the strike face;
a rear fascia, coupled to the rear portion of the body and covering the rear opening;
an internal cavity, defined between the back surface of the front portion and a front surface of the rear fascia and further defined between the back surface of the front portion and the rear portion, wherein the internal cavity is unfilled; and
polymeric stiffening material, within the internal cavity and in contact with the back surface of the front portion and the rear portion, wherein the polymeric stiffening material is insertable, through the rear opening, into the internal cavity before the rear fascia is coupled to the rear portion of the body, and wherein a surface area of the back surface of the front portion contacted by the polymeric stiffening material is at least 100 mm2 and at least 5% of a total surface area of the back surface of the front portion;
wherein the iron-type golf club head has coefficient of restitution (COR) change value between −0.015 and +0.008, the COR change value being defined as a difference between a measured COR value of the iron-type golf club head and a calibration plate COR value;
wherein a characteristic time (CT) at a geometric center of the strike face is at least 250 microseconds;
wherein the strike face is made from a metal alloy and a maximum thickness of the front portion, at the strike face, is less than 3.9 millimeters, inclusive;
wherein the front portion, at the strike face, excluding grooves, has a minimum thickness between 1.1 millimeters and 2.6 millimeters; and
wherein the rear fascia is made of a material having a density between 0.9 g/cc and 5 g/cc, inclusive.