US 11,666,808 B2
Golf club head
Jun Kodaka, Kobe (JP)
Assigned to SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed by Sumitomo Rubber Industries, Ltd., Kobe (JP)
Filed on Jan. 25, 2022, as Appl. No. 17/583,655.
Claims priority of application No. JP2021-017031 (JP), filed on Feb. 5, 2021.
Prior Publication US 2022/0249923 A1, Aug. 11, 2022
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0466 (2013.01) [A63B 53/0408 (2020.08); A63B 53/0433 (2020.08); A63B 53/0437 (2020.08)] 17 Claims
OG exemplary drawing
 
1. A golf club head comprising:
a club face for striking a ball,
a crown forming an upper surface of the golf club head,
a toe portion,
a heel portion, and
a hosel having a shaft insertion hole defining a shaft axis centerline of the club head, wherein
the club face comprises a face center,
the crown comprises a first portion being adjacent to the club face, and a second portion being located backwardly of the first portion and connected to the first portion,
the second portion is located below the first portion via a step portion,
the first portion comprises a face-vicinity portion extending in a toe-heel direction along the club face, and a heel-vicinity portion connected to a heel-side end portion of the face-vicinity portion and extending backwardly of the golf club head along a heel-side contour of the crown,
in a reference state in which the club head is placed on a horizontal plane with a lie angle and a loft angle of the club head, and the shaft axis centerline is arranged within a reference vertical plane perpendicular to the horizontal plane, and in a plan view of the golf club head which is a top view perpendicular to the horizontal plane,
the step portion comprises a first step portion extending from a toe-side end thereof toward a heel-side end thereof in the toe-heel direction, and a second step portion extending backwards smoothly in a curved manner from a first position located on a heel side with respect to the face center to a back-side end of the heel-vicinity portion,
the club head has a maximum length (B) that is a maximum length of the club head in a head front-back direction perpendicular to the reference vertical plane,
the club head has a leading edge that defines a front-end point of the maximum length (B),
the club head has a length (A) in the head front-back direction from the leading edge to a back-side end of the heel-vicinity portion which is an end located most backward position of the second step portion, and the length (A) is equal to or more than 70% of the maximum length (B) of the golf club head, and
in the plan view of the golf club head, the back-side end of the heel-vicinity portion is located on a toe side in the toe-heel direction with respect to the first position.