US 12,102,893 B2
Golf club head and set of golf clubs
Hiroshi Takahashi, Tokyo (JP); and Takaharu Takechi, Tokyo (JP)
Assigned to BRIDGESTONE SPORTS CO., LTD., Tokyo (JP)
Filed by BRIDGESTONE SPORTS CO., LTD., Tokyo (JP)
Filed on Dec. 1, 2022, as Appl. No. 18/060,751.
Claims priority of application No. 2021-209204 (JP), filed on Dec. 23, 2021.
Prior Publication US 2023/0201679 A1, Jun. 29, 2023
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0475 (2013.01) [A63B 53/0408 (2020.08); A63B 53/0445 (2020.08)] 7 Claims
OG exemplary drawing
 
1. A cavity-back iron type golf club head comprising:
a face portion;
a cavity portion provided behind the face portion; and
a protrusion provided on a lower part of a rear face of the face portion,
wherein the protrusion includes
a first recess extending from an upper surface of the protrusion to a sole side,
a second recess positioned closer to a toe side than the first recess is and extending from the upper surface of the protrusion to the sole side, and
a thick portion provided between the first recess and the second recess in a toe-heel direction,
wherein the first recess and the second recess each has a substantially trapezoidal shape in a cross-sectional view taken along a plane that is parallel to a front face of the face portion and that passes through a deepest part of the first recess and a deepest part of the second recess,
wherein the first recess and the second recess each gradually become deeper from the toe side toward a heel side,
wherein the thick portion is positioned behind a center line of a score line provided on the front face of the face portion in the toe-heel direction, and
wherein in a cross-sectional view taken along a face-back direction, the first recess and the second recess each include a face-side inner wall surface and a back-side inner wall surface that are not parallel to the front face of the face portion.