US2015224374A1PendingUtilityA1
Golf club head
Est. expiryDec 21, 2027(~1.4 yrs left)· nominal 20-yr term from priority
A63B 53/0466A63B 60/00A63B 2053/0416A63B 2053/0458A63B 2053/0408A63B 53/0416A63B 53/0458A63B 53/0408
51
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
A golf club head comprises a club head body having an external surface with a heel portion, a toe portion, a crown, a sole, and a face. The golf club head has a moment of inertia about a CG Z axis, I ZZ . In some implementations, I ZZ is greater than 4150 g·cm 2 or greater than 4400 g·cm 2 . The face comprises a bulge curvature that satisfies a predetermined mathematical relationship. In some implementations, a moment of inertia about the CG X axis, I xx , exceeds a predetermined value, and I zz is greater than I xx . The face can comprise a roll curvature, and a ratio of the bulge curvature divided by the roll curvature, R C , can be greater than 0.28 and less than 0.75.
Claims
exact text as granted — not AI-modifiedWe claim:
1 . A golf club head comprising:
a club head body having an external surface with a heel portion, a toe portion, a crown, a sole, and a face; and a moment of inertia about a CG Z axis, I ZZ , wherein I ZZ is greater than 4400 g·cm 2 ; wherein the face comprises:
a bulge curvature; and
wherein the bulge curvature satisfies the following relationship
1
0.00466
×
I
zz
+
23.54
≤
bu
1
g
ecurvature
≤
1
0.00459
×
I
zz
+
14.39
.
2 . The golf club head of claim 1 , wherein the golf club head has a moment of inertia about a CG X axis, I XX , and wherein I XX is at least 2500 g·cm 2 and I ZZ is greater than I xx .
3 . The golf club head of claim 1 , wherein the bulge curvature is between 0.016 cm −1 and 0.027 cm −1 .
4 . The golf club head of claim 1 , wherein the face comprises a roll curvature, and wherein the roll curvature is between 0.033 cm −1 and 0.066 cm −1 .
5 . The golf club head of claim 4 , wherein a ratio of the bulge curvature divided by the roll curvature is between 0.28 and 0.75 at a roll curvature between 0.033 cm −1 and 0.066 cm −1 .
6 . The golf club head of claim 4 , wherein a ratio of the bulge curvature divided by the roll curvature is between about 0.33 and about 0.75 when the I zz is between 4400 g·cm 2 and 5000 g·cm 2 .
7 . The golf club head of claim 1 , wherein a ratio of the bulge curvature divided by the roll curvature is less than 0.84 at a roll curvature of 0.049 cm −1 .
8 . The golf club head of claim 1 , wherein the bulge curvature and the roll curvature are constant over the face of the golf club head.
9 . A golf club head comprising:
a club head body having an external surface with a heel portion, a toe portion, a crown, a sole, and a face; a moment of inertia about the CG Z axis, I zz , wherein I zz is greater than 4150 g·cm 2 ; and a moment of inertia about the CG X axis, I xx , wherein I zz is greater than I xx ; wherein the face comprises a bulge curvature and a roll curvature; and wherein a ratio of the bulge curvature divided by the roll curvature, R C , is greater than 0.28 and less than 0.75.
10 . The golf club head of claim 9 , wherein the bulge curvature is between 0.016 cm −1 and 0.027 cm −1 .
11 . The golf club head of claim 9 , wherein the bulge curvature is between 0.023 cm −1 and 0.027 cm −1 .
12 . The golf club head of claim 9 , wherein the roll curvature is between 0.033 cm −1 and 0.066 cm −1 .
13 . The golf club head of claim 9 , wherein the ratio of the bulge curvature divided by the roll curvature, R C , satisfies the following:
1
(
5.6
×
10
-
4
*
I
ZZ
)
+
0.222
≤
R
C
≤
1
(
2.8
×
10
-
4
*
I
ZZ
)
+
0.111
.
14 . The golf club head of claim 9 , wherein the bulge curvature is determined by with multiple measurements of the golf club head taken on an optical comparator.
15 . The golf club head of claim 14 , wherein measurements for a given axis are taken at the center of the face, at a first distance in both directions of the axis and at a second distance in both directions of the axis, wherein the second distance is longer than the first distance, thereby yielding five measurement points, and wherein an arc is fit through the five measurement points to determine the bulge curvature.
16 . The golf club head of claim 9 , wherein the face comprises a front side and a back side that define a variable face thickness
17 . The golf club head of claim 9 wherein the golf club head has a mass between 170 grams and 220 grams.
18 . A golf club head comprising:
a club head body having an external surface with a heel portion, a toe portion, a crown, a sole, and a face; and a moment of inertia about the CG Z axis, I zz , wherein I zz is greater than 4150 g·cm 2 ; and a moment of inertia about the CG X axis, I xx , wherein I zz is greater than I xx ; wherein the face comprises:
a bulge curvature; and
wherein the bulge curvature satisfies the following relationship
1
0.00466
*
I
zz
+
23.54
≤
bu
1
g
ecurvature
≤
1
0.00459
*
I
zz
+
14.39
.Join the waitlist — get patent alerts
Track US2015224374A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.