GOLF CLUB HEAD

• US 20080032818A1
• Filed: 10/08/2007
• Published: 02/07/2008
• Est. Priority Date: 01/03/2005
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Stevens, Daniel, Williams, Luke, Gibbs, Evan, Hettinger, Ronald, Tang, Larry, Hocknell, Alan, Hallack, Michael, Cackett, Matthew
• Granted Patent: US 7,455,598 B2
• Time in Patent Office: Days
• US Class Current: 473/343
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 2209/02 with reinforcing fibres, e.g. carbon, polyamide fibres
• CPC Class Codes: A63B 2209/023 Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0412 Volume
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/042 the face insert consisting of a material different from that of the head
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0462 characterised by tapering thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence

Abstract

A golf club head (42) having a substantially square or rectangular body is disclosed herein. The golf club head (42) preferably has a volume ranging from 420 cubic centimeters to 470 cubic centimeters. The golf club head (42) preferably has a moment of inertia about the Izz axis through the center of gravity of the golf club head greater than 4000 grams-centimeters squared, and a moment of inertia about the Ixx axis through the center of gravity of the golf club head greater than 3000 grams-centimeters squared.

Claims

1. A wood-type golf club head comprising:

a body comprising a sole, a toe wall, a heel wall, an aft-wall, and a front wall having a perimeter, wherein the aft-wall is substantially perpendicular to the heel wall and the toe wall, the body composed of steel;

a crown composed of plies of pre-preg material;

wherein the golf club head has a distance, Dhw, ranging from 3.5 inches to 4.0 inches;

wherein the golf club head has a distance, Dtw, ranging from 3.5 inches to 4.0 inches;

wherein the golf club head has a distance, Daw, ranging from 4.0 inches to 4.50 inches;

wherein the crown, the sole, the front wall, the heel wall, the aft wall and the toe wall define a hollow interior;

wherein the heel wall extends rearward from a perimeter of the front wall a distance of least 50% of the length of the heel wall at an angle of 80 degrees to 90 degrees relative to relative to a plane parallel to the farthest extent of the front wall;

wherein the golf club head has a volume ranging from 300 cubic centimeters to 500 cubic centimeters, a coefficient of restitution ranging from 0.81 to 0.94, a mass ranging from 180 grains to 215 grams, and a moment of inertia, Izz, about the center of gravity of the golf club head greater than 4000 grams-centimeters squared.

2. The wood-type golf club head according to claim 1 wherein the golf club head has a moment of inertia, Iyy, about the center of gravity of the golf club head ranging from 2000 grams-centimeters squared to 4000 grams-centimeters squared.

3. The wood-type golf club head according to claim 1 wherein the body has a geometric center point, an aft-heel edge point and an aft-toe edge point, wherein the distance from the geometric center point to the aft-heel edge point is equal to the distance from the geometric center point to the aft-toe edge point.

4. The wood-type golf club head according to claim 1 wherein the heel wall extends rearward from a perimeter of the front wall a distance of least 66% of the length of the heel wall at an angle of 80 degrees to 90 degrees relative to a plane parallel to the farthest extent of the front wall.

5. The wood-type golf club head according to claim 1 wherein the heel wall extends rearward from a perimeter of the front wall a distance of least 75% of the length of the heel wall at an angle of 80 degrees to 90 degrees relative to a plane parallel to the farthest extent of the front wall.

6. The wood-type golf club head according to claim 1 wherein the heel wall extends rearward from a perimeter of the front wall a distance of least 90% of the length of the heel wall at an angle of 80 degrees to 90 degrees relative to a plane parallel to the farthest extent of the front wall.

7. The wood-type golf club head according to claim 3 wherein the distance from the geometric center point to the aft-heel edge point and the distance from the geometric center point to the aft-toe edge point are the greatest length of the geometric center point to a location on the golf club head.

8. The wood-type golf club head according to claim 1 wherein the front wall has a face area ranging from 5.00 square inches to 10.0 square inches.