Metal wood club with improved hitting face

• US 7,029,403 B2
• Filed: 05/01/2003
• Issued: 04/18/2006
• Est. Priority Date: 04/18/2000
• Status: Expired due to Term

• Current Assignee: Acushnet Company (FILA Holdings Corp.)
• Original Assignee: Acushnet Company (FILA Holdings Corp.)
• Inventors: Rice, Scott A, Nardacci, Nicholas M
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US10/428,061
• Publication Number:
  US 20030195058A1
• Time in Patent Office: 1,083 Days
• Field of Search: 473324-350, 473290-291
• US Class Current: 473/329
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• 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 53/0458 with non-uniform thickness of the impact face plate
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/08 with special arrangements for obtaining a variable impact
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/42 Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand
• CPC Class Codes: G01N 2291/014 Resonance or resonant frequency
• CPC Class Codes: G01N 2291/02854 Length, thickness
• CPC Class Codes: G01N 29/045 by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks measuring resonant frequency G01H13/00; measuring strength properties by application of mechanical stress G01N3/00

Abstract

A golf club head having selectively oriented zones of relatively high flexural stiffness is disclosed. The hitting face is configured and dimensioned so that it includes an inner zone and a concentric intermediate zone. The inner zone has relatively high flexural stiffness and the intermediate zone has relatively lower flexural stiffness. The inner zone may have an elliptical shape or a substantially parallelogram shape. Preferably, the inner zone has a shape that comprises a major axis and a minor axis and the major axis aligns substantially in the direction of high heel to low toe. This arrangement of inner and intermediate zones creates a gradient of flexural stiffness in the direction of high toe to low heel and produces a desirable manipulation COR in that direction. This area of high coefficient of restitution advantageously coincides with the ball impact pattern that golfers typically make on the hitting face. The hitting face also comprises a measurement zone wherein the lowest COR is at least 93% of the highest COR.

Claims

1. A golf club head comprising:

a face insert and a face support,

the face insert and the face support form a hitting face;

the hitting face comprises an inner zone having a generally parallelogram shape;

the hitting face comprises a first flexural stiffness having a major axis that aligns substantially in the direction of high heel to low toe and an intermediate zone having a second flexural stiffness, wherein the first flexural stiffness is higher than the second flexural stiffness and wherein the major axis of the paralleogram inner zone forms a first angle in the range of about 10°

to about 60°

with a shaft axis of the club head.

2. The golf club head of claim 1, wherein the face support defines a cavity sized and dimensioned to receive the face insert.

3. The golf club head of claim 2, wherein said cavity is located on the hitting face.

4. The golf club head of claim 1, wherein the golf club head defines a cavity sized and dimensioned to receive the face insert.

5. The golf club head of claim 1, wherein the face insert comprises at least one side wall.

6. The golf club head of claim 5, wherein the at least one side wall is a partial crown portion.

7. The golf club head of claim 5, wherein the at least one side wall is a partial sole portion.

8. The golf club of claim 1, wherein the first angle is about 20°

to about 50°

.

9. The golf club of claim 1, wherein the first angle is about 25°

to about 45°

.