IP Library Granted Patent US 7,563,178
Granted Patent B2
US 7,563,178 · App. 11/808,091 · Granted Jul 21, 2009

Golf club head

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Quick Facts
Patent No.
US 7,563,178
App. No.
11/808,091
Granted
Jul 21, 2009
Kind
B2
Abstract

An exemplary golf club head having additional discretionary mass may be realized by utilizing light-weight materials, an favorable average crown height, and/or articulation points. By using a preferred break length, the additional discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.

Claims (22)

1. A golf club head comprising:

a total mass between about 150 g and about 250 g;

a primary heel-toe moment of inertia;

a light-weight component comprising a connecting member, the light-weight component comprising at least about 8% of the total mass;

a club head component coupled to the light-weight component, the club head component comprising a secondary heel-toe moment of inertia, the secondary heel-toe moment of inertia being between about 85% and about 99% of the primary heel-toe moment of inertia; and

a volume of at least about 300 cm 3 .

2. The golf club head of claim 1 , wherein the secondary heel-toe moment of inertia is between about 88% and about 97% of the primary heel-toe moment of inertia.

3. The golf club head of claim 2 , wherein the secondary heel-toe moment of inertia is between about 90% and about 95% of the primary heel-toe moment of inertia.

4. The golf club head of claim 1 , wherein the club head component further includes a striking surface having a sweet spot and a face center, the sweet spot being substantially coincident with the face center.

5. The golf club head of claim 1 , further comprising:

a primary high-low moment of inertia; and

a secondary high-low moment of inertia being between about 85% and about 99% of the primary high-low moment of inertia.

6. The golf club head of claim 5 , wherein the secondary high-low moment of inertia is between about 88% and about 97% of the primary high-low moment of inertia.

7. The golf club head of claim 6 , wherein the secondary high-low moment of inertia is between about 90% and about 95% of the primary high-low moment of inertia.

8. The golf club head of claim 1 , wherein the light-weight component comprises at least about 20% of the total mass.

9. The golf club head of claim 8 , wherein the light-weight component comprises at least about 30% of the total mass.

10. The golf club head of claim 1 , the golf club head further comprising a break length, between about 96 mm and about 140 mm, measured at a vertical distance between about 5 mm and about 10 mm from a ground plane.

11. The golf club head of claim 10 , wherein the break length is between about 100 mm and about 140 mm.

12. The golf club head of claim 1 further comprising a plurality of reference paths, at least one of the plurality of reference paths comprising an average height between about 20 mm and about 45 mm.

13. The golf club head of claim 12 , wherein the average height is between about 36 mm and about 41 mm.

14. The golf club head of claim 12 , wherein the average height is between about 37 mm and about 40 mm.

15. The golf club head of claim 1 further comprising a plurality of reference paths, at least one of the plurality of reference paths comprising at least two articulation points.

Assignments (4)
MERGER Recorded Jan 3, 2019
From: DUNLOP SPORTS CO., LTD.
To: SUMITOMO RUBBER INDUSTRIES, LTD.
Reel/Frame 048002/0320 →
CHANGE OF NAME Recorded Sep 5, 2018
From: SRI SPORTS LIMITED
To: DUNLOP SPORTS CO., LTD.
Reel/Frame 047597/0660 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2010
From: ROGER CLEVELAND GOLF CO., INC.
To: SRI SPORTS LIMITED
Reel/Frame 024411/0289 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 17, 2007
From: RAE, JOHN J.; RADCLIFFE, NATHANIEL J.; HORACEK, ROBERT J.; SCHAEFFER, KEVIN; LACEY, SAM G.; BRUNSKI, JEFF D.
To: ROGER CLEVELAND GOLF CO., LTD
Reel/Frame 019572/0678 →