Golf club head
First Claim
Patent Images
1. A golf club head, comprising:
- a weight distribution which creates a principal axis of inertia intersecting an X axis on an XZ plane at a most acute angle among three principal axes of inertia perpendicular with each other at an angle between 10° and
40°
,wherein when the golf club head is placed on a plane with a predetermined loft angle and coordinate axes are arranged with a center of gravity of the golf club head as an origin, a Z axis is an axis perpendicular with the plane, the X axis is an axis perpendicular with the Z axis and parallel with a tangent of a midpoint of a face of the golf club head, and a Y axis is an axis intersecting the X axis and the Z axis at right angles.
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Accused Products
Abstract
When a golf club head is placed on a plane with a predetermined lie angle and a predetermined loft angle, coordinate axes are arranged with a center of gravity of a golf club head as an origin, an axis perpendicular with the plane as a Z axis, an axis perpendicular with the Z axis and parallel with a tangent of a midpoint of a face of the golf club head as an X axis, and an axis intersecting the X axis and the Z axis at right angles as a Y axis. A line formed by projecting a principal axis of inertia intersecting the X axis at a most acute angle among three principal axes of inertia perpendicular with each other on an XZ plane, is arranged to intersect the X axis at an angle between 10° and 40°.
120 Citations
8 Claims
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1. A golf club head, comprising:
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a weight distribution which creates a principal axis of inertia intersecting an X axis on an XZ plane at a most acute angle among three principal axes of inertia perpendicular with each other at an angle between 10° and
40°
,wherein when the golf club head is placed on a plane with a predetermined loft angle and coordinate axes are arranged with a center of gravity of the golf club head as an origin, a Z axis is an axis perpendicular with the plane, the X axis is an axis perpendicular with the Z axis and parallel with a tangent of a midpoint of a face of the golf club head, and a Y axis is an axis intersecting the X axis and the Z axis at right angles. - View Dependent Claims (2, 3, 4, 5)
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6. A wood-type golf club head, comprising:
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a weight distribution, with an increased weight in at least one of an upper portion of a toe side and a lower portion of a heel side, creating a principal axis of inertia intersecting an X axis at a most acute angle among three principal axes of inertia perpendicular with each other on an XZ plane at an angle between 10° and
40°
, and creating, among secondary moments of a region surrounding an outline of the face observed from a direction of the Y axis, a moment axis of the smallest secondary moment intersecting the X axis at an angle between 0° and
20°
,wherein when the golf club head is placed on a plane with a predetermined loft angle and coordinate axes are arranged with a center of gravity of the golf club head as an origin, a Z axis is an axis perpendicular with the plane, the X axis is an axis perpendicular with the Z axis and parallel with a tangent of a midpoint of a face of the golf club head, and a Y axis is an axis intersecting the X axis and the Z axis at right angles. - View Dependent Claims (7, 8)
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Specification