Ronald Leigh Boyce

US Patent:

6381828, May 7, 2002

Filed:

Apr 13, 2000

Appl. No.:

09/548314

Inventors:

Ronald C. Boyce - San Diego CA
Richard C. Helmstetter - Carlsbad CA
Alan Hocknell - Cardiff CA
J. Andrew Galloway - Escondido CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

295274, 473342, 473345, 473409, 473349, 295272, 29557, 148669

Abstract:

A method for chemically etching a forged striking plate for a golf club to uniformly remove 0. 002 inch to 0. 015 inch of material therefrom. The forged striking plate is placed in an acidic bath to uniformly remove material from all surfaces of the striking plate. The forging process, conducted prior to etching, involves multiple heating and pressing of a metal bar to obtain a final face member configuration. The heating of the metal bar is performed at temperatures below 1000Â C. for less than twenty minutes. The final face member configuration has a striking plate with regions of variable thickness. The metal bar is preferably composed of a forged titanium material.

US Patent:

6390933, May 21, 2002

Filed:

Nov 2, 2000

Appl. No.:

09/705253

Inventors:

J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Rancho Santa Fe CA
Alan Hocknell - Encinitas CA
Ronald C. Boyce - San Diego CA
Homer E. Aguinaldo - San Diego CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5302

US Classification:

473345, 473342, 473305, 473290

Abstract:

A golf club having a club head having with a coefficient of restitution greater than 0. 845 and a durability to withstand 2000 impacts with a golf ball at 110 mile per hour is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4. 00 square inches to 7. 50 square inches.

US Patent:

6435982, Aug 20, 2002

Filed:

Nov 20, 2001

Appl. No.:

09/683118

Inventors:

J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Carlsbad CA
Alan Hocknell - Cardiff CA
Ronald C. Boyce - San Diego CA
Homer E. Aguinaldo - San Diego CA
Curtis S. Woolley - Carlsbad CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473342, 473345, 473349

Abstract:

A golf club having a club head with a striking plate having a thickness in the range of 0. 010 to 0. 250 inch is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The striking plate of the club head may have an aspect ratio less than 1. 7. The striking plate may also have concentric regions of thickness with the thickness portion in the center. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4. 00 square inches to 7. 50 square inches. The golf club head may also have a coefficient of restitution greater than 0.

US Patent:

6440011, Aug 27, 2002

Filed:

Apr 13, 2000

Appl. No.:

09/548531

Inventors:

Alan Hocknell - Cardiff CA
J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Carlsbad CA
Ronald C. Boyce - San Diego CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473342, 473345, 473409, 473349, 295272, 295274, 148669

Abstract:

A method for producing a forged striking plate for a golf club is disclosed herein. The forging process involves multiple heating and pressing of a metal bar to obtain a final face member configuration. The heating of the metal bar is performed at temperatures below 1000Â C. for less than twenty minutes. The final face member configuration has a striking plate with regions of variable thickness. The metal bar is preferably composed of a forged titanium material.

US Patent:

6506127, Jan 14, 2003

Filed:

Dec 21, 2001

Appl. No.:

09/683401

Inventors:

Richard C. Helmstetter - Rancho Santa Fe CA
J. Andrew Galloway - Escondido CA
Ronald C. Boyce - Cardiff CA
Homer E. Aguinaldo - San Diego CA
Alan Hocknell - Encinitas CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473290, 473291

Abstract:

The present invention is directed at varying the thickness of a striking plate of a golf club head according to the loft angle of the golf club head. The thickness of the striking plate is greater for lower loft angles, such as seven, eight and nine degrees loft angle drivers, as compared to ten, eleven and twelve degrees loft angle drivers. The striking plate may have a variable face thickness with the thickest region near the center.

US Patent:

6582321, Jun 24, 2003

Filed:

Feb 28, 2002

Appl. No.:

09/683906

Inventors:

J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Rancho Santa Fe CA
Alan Hocknell - Encinitas CA
Ronald C. Boyce - Cardiff CA
Homer E. Aguinaldo - San Diego CA
Curtis S. Woolley - Carlsbad CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473329, 473342, 473349, 473345

Abstract:

A golf club having a club head with a striking plate having a thickness in the range of 0. 010 to 0. 250 inch is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The striking plate of the club head may have an aspect ratio less than 1. 7. The striking plate may also have concentric regions of thickness with the thickness portion in the center. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4. 00 square inches to 7. 50 square inches. The golf club head may also have a coefficient of restitution greater than 0.

US Patent:

6620056, Sep 16, 2003

Filed:

Mar 12, 2003

Appl. No.:

10/249054

Inventors:

J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Rancho Santo Fe CA
Ronald C. Boyce - Cardiff CA
Homer E. Aguinaldo - San Diego CA
Curtis S. Woolley - Carlsbad CA
Alan Hocknell - Encinitas CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473342, 473329, 473345, 473349

Abstract:

A golf club having a club head with a striking plate having a thickness in the range of 0. 010 to 0. 250 inch is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The striking plate of the club head may have an aspect ratio less than 1. 7. The striking plate may also have concentric regions of thickness with the thickness portion in the center. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4. 00 square inches to 7. 50 square inches. The golf club head may also have a coefficient of restitution greater than 0.

US Patent:

6800040, Oct 5, 2004

Filed:

Sep 3, 2003

Appl. No.:

10/655142

Inventors:

J. Andrew Galloway - Escondido CA
Richard C. Helmstetter - Carlsbad CA
Alan Hocknell - Cardiff CA
Ronald C. Boyce - San Diego CA
Homer E. Aguinaldo - San Diego CA
Curtis S. Woolley - Carlsbad CA

Assignee:

Callaway Golf Company - Carlsbad CA

International Classification:

A63B 5304

US Classification:

473342, 473329, 473345

Abstract:

A golf club having a club head with a striking plate having a thickness in the range of 0. 010 to 0. 250 inch is disclosed herein. The club head may be composed of three pieces, a face member, a sole and a crown. The striking plate of the club head may have an aspect ratio less than 1. 7. The striking plate may also have concentric regions of varying thickness, with the thickness portion in the center. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a striking plate surface area in the range of 4. 00 square inches to 7. 50 square inches. The golf club head may also have a coefficient of restitution greater than 0. 8 under test conditions, such as the USGA test conditions specified pursuant to Rule 4-1e, Appendix II, of the Rules of Golf for 1998-1999.