Golf club head

Patent metadata

Field	Value
Publication number	US-11045695-B2
Application number	US-201916264839-A
Country	US
Kind code	B2
Filing date	Feb 1, 2019
Priority date	Sep 30, 2016
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A golf club head includes a striking face, a sole portion, a top portion, a hosel, a rear surface, a loft no less than 40°, a virtual vertical plane, and a center of gravity. The striking face has a face center, a leading edge, and a virtual striking face plane. The hosel includes an internal bore configured to receive a golf shaft and includes a peripheral side wall and a shaft abutment surface configured to abut a tip end of the golf shaft. The rear surface is opposite the striking face and has an upper portion and a lower portion, the lower portion including a forward-extending recess. The insert covers the recess forming a hollow portion. The virtual vertical plane is perpendicular to the striking face plane and passes through the face center. The center of gravity is spaced a distance from the virtual vertical plane in the heel-to-toe direction.

First claim

We claim:

1. A golf club head comprising:
a loft L 1 between 40° and 50°;
a striking face having a face center, a leading edge, a virtual striking face plane generally parallel to the striking face, and a striking face surface area SA 1 that satisfies the following relationship:
−0.0016 in 2 /(°) 2 ×L 1 2 +0.195 in 2 /°×L 1−1.5 in 2 ≤SA1≤−0.0016 in 2 /(°) 2 ×L 1 2 +0.195 in 2 /°×L 1−1.3 in 2 ;

a sole portion;
a top portion;
a rear surface opposite the striking face;
a hosel;
a virtual vertical plane perpendicular to the first striking face plane and passing through the face center; and
a club head center of gravity spaced from the virtual vertical plane in the heel-to-toe direction by a distance D 1 that is no greater than 6 mm.

2. The golf club head of claim 1 , further comprising a heel blade height BH 1 no greater than 38 mm.

3. The golf club head of claim 1 , wherein the distance D 1 is no greater than 4 mm.

4. The golf club head of claim 3 , wherein D 1 is no greater than 3 mm.

5. The golf club head of claim 1 , wherein L 1 is no greater than 48°.

6. The golf club head of claim 1 , wherein the hosel further comprises an internal bore having an abutment surface configured to support a golf shaft and an auxiliary recess extending sole-ward from the abutment surface.

7. The golf club head of claim 1 , further comprising a sole taper angle in the heel-to-toe direction no less than 10% of the loft L 1 .

8. The golf club head of claim 1 , further comprising a bounce angle measured in the virtual vertical plane, no less than 4°.

9. The golf club head of claim 1 , wherein the hosel further comprises an internal bore depth no greater than 30 mm.

10. A correlated set of golf club heads comprising:
a first club head that, when oriented in a reference position, comprises:
a first loft L 1 between 40° and 50°;
a first striking face having a first face center, a first leading edge, a first virtual striking face plane generally parallel to the first striking face, and a first striking face surface area SA 1 that satisfies the following relationship:
−0.0016 in 2 /(°) 2 ×L 1 2 +0.195 in 2 /°×L 1−1.5 in 2 ≤SA1≤−0.0016 in 2 /(°) 2 ×L 1 2 +0.195 in 2 /°×L 1−1.3 in 2 ;

a first sole portion;
a first top portion;
a first rear surface opposite the first striking face;
a first hosel;
a first virtual vertical plane perpendicular to the first striking face plane and passing through the first face center; and
a first club head center of gravity spaced from the first virtual vertical plane in the heel-to-toe direction by a first distance D 1 A that is no greater than 6 mm; and

a second club head that, when oriented in a reference position, comprises:
a second loft L 2 greater than 50°;
a second striking face having a second face center, a second leading edge, a second virtual striking face plane generally parallel to the second striking face, and a second striking face surface area SA 2 that satisfies the following relationship:
−0.0016 in 2 /(°) 2 ×L 2 2 +0.195 in 2 /°×L 2−1.5 in 2 ≤SA2≤−0.0016 in 2 /(°) 2 ×L 2 2 +0.195 in 2 /°×L 2−1.3 in 2 ;

a second sole portion;
a second top portion;
a second rear surface opposite the second striking face;
a second hosel;
a second virtual vertical plane perpendicular to the second striking face plane and passing through the second face center; and
a second club head center of gravity spaced from the second virtual vertical plane in the heel-to-toe direction by a second distance D 1 B that is no greater than 6 mm.

11. The correlated set of golf club heads of claim 10 , wherein:
the first club head comprises a first heel blade height BH 1 no greater than 38 mm; and
the second club head comprises a second heel blade height BH 2 no less than 39 mm.

12. The correlated set of golf club heads of claim 10 , wherein at least one of:
D 1 A is no greater than 4.5 mm; and
D 1 B is no greater than 4.5 mm.

13. The correlated set of golf club heads of claim 10 , wherein the distance D 1 is no greater than 4.0 mm.

14. The correlated set of golf club heads of claim 13 , wherein D 1 is no greater than 3 mm.

15. The correlated set of golf club heads of claim 10 , wherein:
SA 1 is no greater than 4.25 in 2 ; and
SA 2 is no less than 4.5 in 2 .

16. The correlated set of golf club heads of claim 10 , wherein:
L 1 is no greater than 48°; and
L 2 is no less than 54°.

17. The correlated set of golf club heads of claim 10 , wherein at least one of the first hosel and the second hosel further comprises an internal bore having an abutment surface configured to support a golf shaft and an auxiliary recess extending sole-ward from the abutment surface.

18. The correlated set of golf club heads of claim 10 , wherein at least one of:
the first golf club head comprises a first sole taper angle in the heel-to-toe direction no less than 10% of L 1 ; and
the second golf club head comprises a second sole taper angle in the heel-to-toe direction no less than 10% of L 2 .

19. The correlated set of golf club heads of claim 10 , wherein at least one of the first golf club head and the second golf club head further comprises a bounce angle measured in the virtual vertical plane, no less than 4°.

20. The correlated set of golf club heads of claim 10 , wherein at least one of:
the first hosel comprises an internal bore depth no greater than 30 mm; and
the second hosel comprises an internal bore depth no greater than 30 mm.

Assignees

• Dunlop Sports Co Ltd

Inventors

• Ripp Patrick
• Seagram Phill
• Becktor Mika
• Dolezel Keith

Classifications

• A63B2053/0491

  with added weights, e.g. changeable, replaceable · CPC title

• A63B53/0475

  with one or more enclosed cavities · CPC title

• A63B2102/32

  Golf · CPC title

• A63B60/50

  with through-holes (A63B60/18 takes precedence; for stringing purposes A63B49/00) · CPC title

• A63B60/52

  with slits · CPC title