Golf club head having a striking face with improved impact efficiency

• US 20040185959A1
• Filed: 01/28/2004
• Published: 09/23/2004
• Est. Priority Date: 03/14/2000
• Status: Active Grant

• Current Assignee: Callaway Golf Company
• Original Assignee: Callaway Golf Company
• Inventors: Kosmatka, John B.
• Granted Patent: US 6,949,032 B2
• Time in Patent Office: Days
• US Class Current: 473/329
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0416 Heads having an impact surface provided by a face insert
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like

Abstract

A compliant golf club head permits a more efficient impact between a golf ball and the golf club head. Material and geometry constraints of a striking plate of the golf club head can reduce energy losses caused by large strain and strain rate values of the golf ball, these constraints on the striking plate yield a measure of the impact efficiency of the golf club head. Designating a required natural frequency range of the striking plate provides improved impact efficiency between the golf ball the golf club head.

Claims

1. A wood-type golf club head comprising:

a striking plate composed of a titanium alloy material and having a thickness less than 0.200 inch and greater than 0.070 inch, the striking plate having a natural frequency of less than 4500 Hz and greater than 2800 Hz.

2. The wood-type golf club head according to claim 1 wherein the natural frequency is less than 3300 Hz and greater than 2800 Hz.

3. A wood-type golf club head comprising:

a striking plate disposed in the open front of the body, the striking plate composed of a titanium alloy material and having a thickness less than 0.140 inch, the striking plate having a plurality of scorelines thereon, the striking plate having a natural frequency of less than 8500 Hz and greater than 2800 Hz.

4. A wood-type golf club head comprising:

a body having a striking plate, the striking plate composed of a forged titanium alloy material and having a thickness less than 0.140 inch, the striking plate having a plurality of scorelines thereon, the striking plate having a natural frequency of less than 4500 Hz and greater than 2800 Hz, the golf club head having a volume ranging from 300 cubic centimeters to 450 cubic centimeters.

5. The wood-type golf club head according to claim 4 wherein the natural frequency is less than 3300 Hz and greater than 2800 Hz.

6. The wood-type golf club head according to claim 4 wherein the volume is 385 cubic centimeters.