Golf putter and method of designing the same
AssigneeSumitomo Rubber Industries, Ltd.
InventorsKeiji Moriyama, Masanori Yabu
Life of this patent
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Abstract
Three moments of inertia M1, M2, and M3 (g·cm 2) about three axes defined in a golf putter are defined in a manner to provide a weight balance satisfying the expressions {(M1−M2)<12000} and {M1>M2>M3}.
Claims5
A golf putter designed to have a weight balance wherein:
- three moments of inertia M1, M2, and M3 defined in units of g·cm2 by following descriptions (1) to (3) satisfy following expressions (A) and (B):
- M1−M2<12000 (A)
- M1>M2>M3 (B),
- (1) M1:
- 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) M2:
- 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) M3:
- a moment of inertia of the putter about a third axis defined by the shaft axis.
A method of designing a golf putter, which defines a weight balance of the putter considering a correlation of magnitudes of three moments of inertia about principal inertial axes of the putter.
A method of designing a golf putter, which defines a weight balance of the putter considering a correlation of magnitudes of three moments of inertia M1, M2, and M3 g·cm2 defined by the following descriptions (1) to (3) and a value of M1−M2,
- (1) M1:
- 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) M2:
- 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) M3:
- a moment of inertia of the putter about a third axis defined by the shaft axis.
Dependencies are inferred from the claim text.