Patent ID: 11883724
Assignee: TAYLOR MADE GOLF COMPANY, INC.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 17:
18. A clubhead for an iron-type golf club, the clubhead comprising:
a body having a heel portion, a toe portion, a top-line portion, a rear portion, a face portion, a sole portion extending rearwardly from a lower end of the face portion to a lower portion of the rear portion,
wherein a sole bar defines a rearward portion of the sole portion,
wherein a cavity is defined by a region of the body rearward of the face portion, forward of the rear portion, above the sole portion, and below the top-line portion,
wherein a lower undercut region is defined within the cavity rearward of the face portion, forward of the sole bar, and above the sole portion,
wherein a lower ledge extends above the sole bar to further define the lower undercut region,
wherein an upper undercut region is defined within the cavity rearward of the face portion, forward of an upper ledge and below the top-line portion, and
wherein the upper ledge extends below the top-line portion; and
a shim received at least in part by the upper ledge and the lower ledge, wherein the shim is configured to close a non-circular opening in the cavity and to enclose an internal cavity volume between 5 cc and 30 cc, and the shim has a density of no more than 2 g/cc;
wherein the opening in the cavity has an area as projected onto the face portion of between 1200 mm2 and 2000 mm2, and the area as projected onto the face portion of the opening in the cavity is at least 62% of an area of the shim as projected onto the face portion;
wherein the clubhead has an external water-displaced clubhead volume between 35 cc and 65 cc; and
wherein a ratio of the internal cavity volume to the external water-displaced clubhead volume is between 0.1 and 0.4.