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US 6,425,832 B2Granted
Golf club head that optimizes products of inertia
AssigneeCallaway Golf Company
InventorsMatthew T. Cackett, D. Clayton Evans, Frank H. Fan, Alan Hocknell, Richard C. Helmstetter
Life of this patent
Estimating the term…
Abstract
A golf club having products of inertia Ixy, Ixz and Iyz with absolute values below 100 g-cm2 is disclosed herein. The golf club has a large volume, a high moment of inertia, or both. Preferably, the moment of inertia, Izz, of the golf club head about a vertical axis Z through the center of gravity ranges from 3000 g-cm2 to 5000 g-cm2, and a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head ranges from 1900 g-cm2 to 2050 g-cm2. Preferably, the golf club head is composed of plies of pre-preg sheets. The volume of the golf club head preferably varies from 300 cm3 to 600 cm3.
Claims20
A golf club head comprising:
- a body having a crown, a sole and a striking plate, the body having a hollow interior;
- wherein the golf club head has a volume ranging from 300 cm3 to 600 cm3, and each of the products inertia, Ixy, Ixz and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by a vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club head comprising:
- a body having a hollow interior and composed of a composite material, the body having a face, a sole, a crown, a ribbon juxtaposed by the sole and the crown, a heel end and a toe end;
- and
- a plurality of weight strips, each of the plurality of weight strips composed of a material having a density greater than the composite material, each of the plurality of weight strips disposed on the ribbon;
- wherein the golf club head has a volume ranging from 300 cm3 to 600 cm3, and each of the products inertia, Ixy, Ixz and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by a vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the face, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
1 more element
A golf club head comprising:
- a body having a crown, a sole and a striking plate, the body having a hollow interior;
- wherein the golf club head has a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head that ranges from 1900 g-cm2 to 2050 g-cm2, and each of the products inertia, Ixy, Ixz, and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, the horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis x through the center of gravity to the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club head comprising:
- a body having a crown, a sole and a striking plate, the body having a hollow interior, the body composed of a titanium alloy material, the body having a mass less than 250 g;
- a plurality of weight members disposed within the hollow interior of the body, the plurality of weight members having a total mass of less than 85 g;
- wherein the golf club head has a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head that ranges from 1900 g-cm2 to 2050 g-cm2, and each of the products inertia, Ixy, Ixz, and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, the horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club head comprising:
- a body having a crown, a sole and a striking plate, the body having a hollow interior, the body composed of a steel alloy material;
- a plurality of weight members disposed within the hollow interior of the body, the plurality of weight members having a total mass of less than 85 g;
- wherein the golf club head has a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head that ranges from 1900 g-cm2 to 2050 g-cm2, and each of the products inertia, Ixy, Ixz and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, the horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club comprising:
- a golf club head having a crown, a sole, a striking plate and an external hosel extending outward from the crown, the golf club head having a hollow interior;
- wherein the golf club head has a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head that ranges from 1900 g-cm2 to 2050 g-cm2, and each of the products inertia, Ixy, Ixz, and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, the horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club comprising:
- a golf club head having a crown, a sole and a striking plate, the golf club head having a hollow interior, the golf club head composed of a titanium alloy material, the golf club head having a mass less than 250 g, the striking plate having concentric regions of varying thickness;
- a plurality of weight members disposed within the hollow interior of the body, the plurality of weight members having a total mass of less than 85 g;
- wherein the golf club head has a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, a moment of inertia, Iyy, about a horizontal axis Y through the center of gravity of the golf club head that ranges from 1900 g-cm2 to 2050 g-cm2, and each of the products inertia, Ixy, Ixz, and Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, the horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club head comprising:
- a body having a crown, a sole and a striking plate, the body having a hollow interior;
- wherein the golf club head has a volume ranging from 300 cm3 to 600 cm3, the product of inertia, Ixy, of the golf club head has an absolute value less than 50 g-cm2, the product of inertia, Ixz, of the golf club head has an absolute value less than 100 g-cm2, and the product of inertia, Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by a vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
A golf club head comprising:
- a body having a crown, a sole with a ribbon, and a striking plate, the body having a hollow interior;
- a plurality of weight members disposed within the hollow interior of the body, the plurality of weight members having a total mass of less than 85 g;
- wherein the golf club head has a volume ranging from 300 cm3 to 600 cm3, a moment of inertia, Izz, about a vertical axis Z through the center of gravity of the golf club head that ranges from 3000 g-cm2 to 5000 g-cm2, the product of inertia, Ixy, of the golf club head has an absolute value less than 50 g-cm2, the product of inertia, Ixz, of the golf club head has an absolute value less than 100 g-cm2, and the product of inertia, Iyz, of the golf club head has an absolute value less than 100 g-cm2, wherein the products of inertia are defined by the vertical axis Z through the center of gravity of the golf club head, a horizontal axis Y through the center of gravity of the golf club head and substantially parallel to the striking plate, and a forward to rearward axis X through the center of gravity of the golf club head, the X axis, the Y axis and the Z axis orthogonal to each other.
Dependencies are inferred from the claim text.