US 12,070,665 B2
Golf club head having multi-layered striking face
Richard Sanchez, Temecula, CA (US); Richard L. Cleghorn, Oceanside, CA (US); Tony Luna, Vista, CA (US); and Kyle A. Carr, Carlsbad, CA (US)
Assigned to Acushnet Company, Fairhaven, MA (US)
Filed by Acushnet Company, Fairhaven, MA (US)
Filed on Sep. 2, 2022, as Appl. No. 17/902,266.
Application 17/902,266 is a continuation of application No. 17/563,521, filed on Dec. 28, 2021, granted, now 11,491,377.
Prior Publication US 2023/0201677 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0475 (2013.01) [A63B 53/0408 (2020.08); A63B 53/0416 (2020.08); A63B 2209/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An iron type golf club head comprising:
a striking face portion located at a frontal portion of said golf club head and an aft rear portion attached to said striking face portion forming an internal cavity therebetween;
said striking face portion having a face center and further comprises;
an external frontal face layer located at an external frontal portion of said striking face portion and having a face center thickness of between 0.8 mm and 1.4 mm at the face center and a leading edge region thickness of between about 0.6 mm and 1.0 mm;
an internal rear face layer located at an internal rear portion of said striking face portion and having an internal face center thickness of between 0.5 mm and 1.2 mm at the face center and the internal rear face layer includes an internal rear face layer bottom portion having a thickness of between 1.1 mm and 1.4 mm and that is between 20% and 50% greater than the internal face center thickness, wherein the face center thickness is greater than the internal face center thickness; and
an intermediary sandwiched face layer, juxtaposed between said external frontal face layer and said internal rear face layer, having an unconstrained perimeter and having a thickness of 0.8 mm and 1.2 mm at the face center; and
wherein said intermediary sandwiched face layer is comprised of a polymeric material having a flexural modulus of between 30 ksi and 75 ksi.