Patent ID: 7371187

Claim:
A golf putter designed to have a weight balance wherein: three moments of inertia M 1 , M 2 , and M 3 defined in units of g·cm 2 by the following descriptions (1) to (3) satisfy the following expressions (A) and (B): M 1− M 2<12000 (A) M1> M 2> M 3 (B), (1) M 1 : a moment of inertia of the putter about a first axis through a reference point P, parallel to a face surface and perpendicular to a shaft axis, the reference point P defined by an intersection of the shaft axis and a perpendicular line from a putter-supporting point on the shaft to the shaft axis in a static balance state of the one-point supported putter; (2) M 2 : a moment of inertia of the putter about a second axis through the reference point P and perpendicular to the first axis and to the shaft axis; and (3) M 3 : a moment of inertia of the putter about a third axis defined by the shaft axis.