Golf club with stable face angle

• US 8,303,429 B2
• Filed: 01/22/2010
• Issued: 11/06/2012
• Est. Priority Date: 01/27/2009
• Status: Active Grant

• Current Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Original Assignee: Callaway Golf Company (Topgolf Callaway Brands Corp.)
• Inventors: Cackett, Matthew T., Hocknell, Alan
• Primary Examiner(s): HUNTER, ALVIN A
• Application Number:
  US12/692,447
• Publication Number:
  US 20110039637A1
• Time in Patent Office: 1,019 Days
• Field of Search: 473324-350
• US Class Current: 473/246
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0466 wood-type

Abstract

A golf club having a golf club head 20 with a keel zone that makes the actual face angle of the golf club appear differently when the golf club is at address. The golf club head 20 has a keel zone that is preferably 0.5 inch wide in the fore-aft direction and 1.0 inch wide in the heel-toe direction, which changes the appearance of the face angle while the golf club is at address.

Claims

1. A wood-type golf club head comprising:

a body having a front portion, a crown portion and a sole portion, the body also having a heel end, a toe end and an aft end, the sole portion having only a single keel point;

a keel zone within the sole located with respect to the center of gravity, having a width ranging from 0.5 inch to 0.6 inch wide fore-aft and 1.0 inch to 1.1 inch wide heel-toe.

2. The golf club according to claim 1 wherein the keel zone is located in the fore-aft direction relative to the equilibrium line.

3. The golf club according to claim 1 wherein the keel zone is located in the heel-toe direction by the target lie angle.

4. The wood-type golf club according to claim 1 wherein the center of the keel zone contacts the ground at the target lie angle and the zone is equally dispersed about the contact point in the heel and toe directions.

5. A wood-type golf club comprising:

a golf club head comprising

a body having a front portion, a crown portion and a sole portion, the body also having a heel end, a toe end and an aft end, the sole portion having a single keel point,

a keel zone within the sole located with respect to the center of gravity, having a width ranging from 0.5 inch to 0.55 inch wide fore-aft and 1.0 inch to 1.05 inch wide heel-toe;

and

a shaft connected to the golf club head;

wherein the keel zone is located in the fore-aft direction relative to the equilibrium line and in the toe-heel direction relative to the target lie angle.

6. The wood-type golf club according to claim 5 wherein the golf club head has a volume ranging from 420 cc to 470 cc.

7. The wood-type golf club according to claim 5 wherein the center of the keel zone contacts the ground at the target lie angle and the zone is equally dispersed about the contact point in the heel and toe directions.

8. A wood-type golf club head comprising:

a body having a front portion, a crown portion and a sole portion, the body also having a heel end, a toe end and an aft end, the sole portion having a single keel point;

a keel zone within the sole located with respect to the center of gravity, having a width ranging from 0.5 inch to 0.55 inch wide fore-aft and 1.0 inch to 1.05 inch wide heel-toe.

9. The wood-type golf club head according to claim 8 wherein the keel zone contacts the ground at the target lie angle and the zone is equally dispersed about the contact point in the heel and toe directions.