Steven J Mahaffey from 603 Glendale Rd, Wilbraham, MA 01095, age 72

Golf Club Head With Peripheral Weighting
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US Patent:

6860818, Mar 1, 2005
Filed:

Mar 4, 2003
Appl. No.:

10/379146
Inventors:

Steven J. Mahaffey - Belchertown MA, US
Thomas M. Greene - Monson MA, US
David Lowe - Unionville CT, US
Assignee:

Callaway Golf Company - Carlsbad CA
International Classification:

A63B053/04
US Classification:

473256, 473327
Abstract:

A golf club head with low peripheral and rearward weighting includes C-shaped and annular weights connected with at least one of the rear and bottom surfaces, respectively, of the head. The weighting within the peripheral weights is adjustable between the heel, rear, and toe portions of the head to customize the weight distribution of the head in accordance with a golfer's swing. The added weight and its orientation increases the moment of inertia of the head and reduces the rotation thereof.

Golf Club Head With Peripheral Weighting
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US Patent:

6890267, May 10, 2005
Filed:

Mar 11, 2004
Appl. No.:

10/798147
Inventors:

Steven J. Mahaffey - Belchertown MA, US
Thomas M. Greene - Monson MA, US
David Lowe - Annapolis MD, US
Assignee:

Callaway Golf Company - Carlsbad CA
International Classification:

A63B053/04
US Classification:

473256, 473328, 473334
Abstract:

A golf club head with low peripheral and rearward weighting includes C-shaped and annular weights connected with at least one of the rear and bottom surfaces, respectively, of the head. The weighting within the peripheral weights is adjustable between the heel, rear, and toe portions of the head to customize the weight distribution of the head in accordance with a golfer's swing. The added weight and its orientation increases the moment of inertia of the head and reduces the rotation thereof.

Golf Club Set With Progressive Weight Pad
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US Patent:

6935967, Aug 30, 2005
Filed:

Jun 10, 2003
Appl. No.:

10/458491
Inventors:

Steven J. Mahaffey - Belchertown MA, US
Ryan Roach - Northampton MA, US
Ronnie F. McGraw - Fort Worth TX, US
Assignee:

Callaway Golf Company - Carlsbad CA
International Classification:

A63B053/04
US Classification:

473291, 473349
Abstract:

A set of golf club irons of the blade type is characterized by a weight pad behind the impact area of the club face which progressively increases in height through the set from the long irons to the short irons. In addition, the thickness of the sole portion of each head increases through the set to progressively increase the weight at the bottom of the club heads. The clubs provide improved feel to the golfer which enable the golfer to work the ball more easily during execution of a golf shot.

Golf Club Head With A Face Insert
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US Patent:

6986715, Jan 17, 2006
Filed:

Jun 4, 2004
Appl. No.:

10/709902
Inventors:

Steven J. Mahaffey - San Marcos CA, US
Assignee:

Callaway Golf Company - Carlsbad CA
International Classification:

A63B 53/02
A63B 53/04
US Classification:

473305, 473342, 473345, 473349
Abstract:

A golf club head () having a body () with a front wall () with an opening () and a striking plate insert () is disclosed herein. The striking plate insert () preferably includes an outer layer () and an inner layer () that are joined together by an explosion bonding process. The inner layer () is preferably composed of a material that has a lower yield strength than that of the outer layer (). The explosion bonding process results in the striking plate insert having an increased yield strength relative to the yield strengths of the individual layers. The golf club head () preferably has a moment of inertia, Izz, about the Z axis through the center of gravity of the golf club head ranging from 2700 g-cmto 4000 g-cm.

Golf Club Head With Peripheral Weighting
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US Patent:

6988960, Jan 24, 2006
Filed:

Feb 28, 2005
Appl. No.:

11/069284
Inventors:

Steven J. Mahaffey - Northampton MA, US
Thomas M. Greene - Monson MA, US
David Lowe - Unionville CT, US
Assignee:

Callaway Golf Company - Carlsbad CA
International Classification:

A63B 53/04
US Classification:

473345, 473256, 473327, 473334
Abstract:

A golf club head with low peripheral and rearward weighting includes C-shaped and annular weights connected with at least one of the rear and bottom surfaces, respectively, of the head. The weighting within the peripheral weights is adjustable between the heel, rear, and toe portions of the head to customize the weight distribution of the head in accordance with a golfer's swing. The added weight and its orientation increases the moment of inertia of the head and reduces the rotation thereof.