US 9,808,681 B2
Golf club head
Takaharu Takechi, Tokyo (JP)
Assigned to Bridgestone Sports Co., Ltd., Tokyo (JP)
Filed by Bridgestone Sports Co., Ltd., Tokyo (JP)
Filed on May 12, 2016, as Appl. No. 15/153,381.
Claims priority of application No. 2015-105628 (JP), filed on May 25, 2015; and application No. 2015-105629 (JP), filed on May 25, 2015.
Prior Publication US 2016/0346645 A1, Dec. 1, 2016
Int. Cl. A63B 53/04 (2015.01); A63B 60/50 (2015.01)
CPC A63B 53/0466 (2013.01) [A63B 60/50 (2015.10); A63B 2053/0408 (2013.01); A63B 2053/0437 (2013.01); A63B 2053/0462 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A hollow golf club head, comprising a face part, a sole part, a side part, a crown part, and a hosel part, wherein
at least one of the face part and the crown part has portions of two different thicknesses that are first and second thickness portions, the first thickness portion having a first thickness, and the second thickness portion having a second thickness that is different from the first thickness,
a rigidity of the first thickness portion is the same as a rigidity of the second thickness portion,
the second thickness of the second thickness portion is greater than the first thickness of the first thickness portion, and
the second thickness portion has a hollow chamber part that is a hollow chamber entirely enclosed within the second thickness portion.