Chanh D Truong

US Patent:

8608590, Dec 17, 2013

Filed:

Jun 14, 2007

Appl. No.:

12/304106

Inventors:

Lloyd A. Hackel - Livermore CA, US
Jon Rankin - Dublin CA, US
Chanh H. Truong - Hayward CA, US
C. Brent Dane - Livermore CA, US

Assignee:

Metal Improvement Company, LLC - Paramus NJ

International Classification:

A63B 53/04

US Classification:

473342, 473349

Abstract:

A method of manufacturing a driver, or other types of golf club, includes inducing residual compressive stress by high intensity laser shock peening to form an array of laser shock peened impact zones on the club face. Laser pulses having irradiance greater than 4 GW/cm, with spot size greater than 4 mmare used, including a pulse with on the order of 16 ns, with spot size greater than 9 mm. Residual compressive stress of more than 400 MPa penetrating with a depth of more than 0. 2 mm are imparted, without increased hardening in or damage to the face of the club. Laser shock peening a pattern that covers an interior area leaves the perimeter unpeened, inducing a stress gradient between interior area and the perimeter of the club face. Multiple layers of arrays of laser shock impact zones are applied on the club. The technology is readily applied to assembled club heads.

US Patent:

20070138157, Jun 21, 2007

Filed:

Dec 7, 2006

Appl. No.:

11/608210

Inventors:

C. Brent Dane - Livermore CA, US
Lloyd Hackel - Livermore CA, US
Fritz Harris - Rocklin CA, US
Chanh Truong - Hayward CA, US
James Wintemute - Livermore CA, US

Assignee:

Metal Improvement Company LLC - Paramus NJ

International Classification:

B23K 26/00
B29C 65/16

US Classification:

219121850, 219121600

Abstract:

A method for laser shock processing a device, including a metallic body having a surface, comprises conformally applying a compliant solid material to the first region on the surface of the metallic body and applying a layer of ablative material to the second region on the surface of the metallic body. A damping liquid is flowed over the layer of ablative material. An array of pulses of laser energy is directed through the damping fluid to impact the layer of ablative material on the surface and peen the surface in the second region. The pulses induce pressure waves within the metallic body which propagate to the surface in the first region. The compliant solid material acts as a momentum trap, so that the acoustic waves are at least partially coupled into the compliant solid material and attenuated outside of the metallic body.