Method of adjusting coefficient of restitution of face of golf club head

a golf club and coefficient technology, applied in the field of making golf clubs, can solve the problems of increasing the cost, shifting the center of gravity of the head, and the cost of manufacturing such faces is much higher, and achieves the effect of reducing the cost of manufactur

Inactive Publication Date: 2008-03-13
CHEN ARCHER C C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The primary objective of the present invention is to provide a method of adjusting the coefficient of restitution of the face, which has lower cost of manufacture and fit to various types of golf clubs.
[0007]According to the objectives of the present invention, a method of adjusting a coefficient of restitution of the face of a golf club head including the step of fixing a metallic assistant device on a back of the face to reduce the coefficient of restitution of the face.

Problems solved by technology

The thicker face increases the cost and shifts the center of gravity of the head forward that is disadvantageous for swing.
The forging process is working under a high temperature environment and molded in several molds that the cost of manufacturing such faces is much higher and can not meet the requirement of quick and mass production and making the products with less quantity and more aspects.

Method used

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  • Method of adjusting coefficient of restitution of face of golf club head
  • Method of adjusting coefficient of restitution of face of golf club head
  • Method of adjusting coefficient of restitution of face of golf club head

Examples

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Embodiment Construction

[0011]As shown in FIG. 1, a face 10 of a golf club head may be made of metal and made by casting, forging or punching. In the present invention, the face 10 is made of titanium alloy, more preferred βTi TVC, with a thickness about 2.5 mm and a hardness of HRC42°. An assistant device 20 is made of βTi 15-333 with a thickness about 1.5 mm and a hardness of HRC28°. The assistant device 20 is pressed on a center of a back side of the face 10 and spun in a high speed. The spinning of the assistant device 20 generates heat, and the heat welds the assistant device 20 and the face 10 together, so called friction welding, to form a face thicker at center and thinner at margin. The thickness of the center of the face is about 4 mm that may reduce the ROC.

[0012]As shown in FIG. 2, the second preferred embodiment provides a face 30 made of 6-4 titanium and an annular assistant device 40, which is made of 6-4 titanium also, fixed at a center of a back of the face 30 by friction welding. It has g...

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Abstract

The present invention provides a method of adjusting a coefficient of restitution (COR) of the face of a golf club head. A metallic assistant device is fixed on a center of a back of the face by friction welding or brazing. The metallic assistant may increases the central thickness of the face that may reduce the COR of the face.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates generally to a method of making golf club, and more particularly to a method of making a golf club head that may adjust the coefficient of restitution of the face.[0003]2. Description of the Related Art[0004]In the standards of United States Golf Association (USGA), the coefficient of restitution (COR) of the face must be less than 0.83. The golf club with COR greater than 0.83 is forbidden in the game. The facts of COR of the face include the thickness of the face and the hardness of the face. The thicker or harder face will have less COR. In present days, the new material had introduced in golf clubs that the thinner face can pass the strength test. However, the thinner face usually has the COR greater than 0.83. A solution is making the face thicker. The thicker face increases the cost and shifts the center of gravity of the head forward that is disadvantageous for swing. Now, a new head...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B53/00A63B53/04A63B102/32
CPCA63B53/0466A63B53/06A63B2053/045A63B2053/0437A63B2209/00A63B2053/0454A63B2053/0433A63B2053/0458A63B53/0437A63B53/0433A63B53/0454A63B53/0458A63B53/045
Inventor CHEN, ARCHER C. C.
Owner CHEN ARCHER C C
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