Patent ID: 11918864
Assignee: KARSTEN MANUFACTURING CORPORATION
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 9:
10. A putter-type golf club head comprising:
a body comprising:
a heel portion;
a toe portion distal from the heel portion;
a top rail;
a sole portion distal from the top rail; and
a striking surface forming a recess defined by the heel portion, the toe portion, the top rail, and the sole portion of the body;
a striking surface imaginary vertical axis that extends through a geometric center of the striking surface relative to the heel portion, the toe portion, the top rail, and the sole portion; and

an insert configured to be received within and complimentary with the recess defined by the striking surface;
wherein:
the insert comprises a first material and a second material forming at least one of a front surface adapted for impact with a golf ball, a rear surface opposite the front surface, and a second material thickness defined as a distance between the front surface and the rear surface;
the insert further defines a plurality of circular-shaped voids that extend through an entirety of the second material thickness;
wherein the plurality of circular-shaped voids are arranged in a plurality of rows extending in a heel-to-toe direction and a plurality of columns extending in a top rail-to-sole direction;
wherein a vertical center-to-center distance between adjacent circular-shaped voids within a given column increases from the geometric center toward the top rail and the sole portion;
wherein the vertical center-to-center distance between adjacent circular-shaped voids is governed by the equation:

Vi=V1*BV(i-1) 

wherein:
Vi is the vertical center-to-center distance between a given pair of circular-shaped voids; and
BV is a constant greater than 1.