Patent ID: 11865418
Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 0:
1. A putter-type golf club head that, when oriented in a reference position, comprises:
a main body including:
a heel;
a toe opposite the heel;
a front portion having a face defining a virtual face plane, the face including a forward-most extent of the front portion;
a rear portion extending rearwardly from the front portion and having a rearward-most extent of the golf club head, the rear portion including:
a heel projection projecting rearwardly from the front portion;
a toe projection projecting rearwardly from the front portion; and
a central section between the heel projection and the toe projection, the central section projecting less rearwardly from the front portion than each of the heel projection and the toe projection by at least 30.0 mm; and

a sole surface including a plurality of empty sole recesses located entirely rearwardly of a golf club head center of gravity CG, the plurality of empty sole recesses being located in the heel projection and the toe projection, with each of the heel projection and the toe projection containing a sole recess of the plurality of empty sole recesses, each of the plurality of empty sole recesses being in the form of a blind hole and comprising a plurality of sub-recesses arranged in a front to rear direction, at least a portion of each of the plurality of sub-recesses of the plurality of empty sole recesses being located rearward of the central section, and in each of the plurality of empty sole recesses, each sub-recess has a same depth on a side of the sole recess facing toward the central section as the other sub-recesses in that empty sole recess and a different depth on a side of the sole recess facing away from the central section than the other sub-recesses in that empty sole recess;

a weight insert that is denser than the main body and includes an insert CG located rearwardly from the virtual face plane by a distance no more than 1.0 cm;
a CG depth CGD that is measured along a depth axis that passes through the CG and is normal to the virtual face plane, the CGD being no greater than 25.0 mm;
a golf club head length L measured in the front to rear direction from the forward-most extent of the front portion to the rearward-most extent of the rear portion, L being no less than 75.0 mm; and
a ratio of CGD/L of no less than 0.15 and at most 0.30.