US2022047925A1PendingUtilityA1
Iron type golf club head
Est. expiryAug 13, 2040(~14 yrs left)· nominal 20-yr term from priority
Inventors:Charles E. GoldenGrant M. MartensGentry FergusonRyan J. A. RitchieMarni D. InesRichard L. CleghornGery M. Zimmerman
A63B 53/047A63B 53/0408A63B 53/0458A63B 2102/32A63B 53/04A63B 53/0462A63B 53/0454
49
PatentIndex Score
0
Cited by
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References
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Claims
Abstract
An iron golf club head achieving improved performance via a specific Effective Stiffness Area ratio between the boundary of the iron golf club head and the face of the iron golf club head is disclosed. More specifically, the present invention discloses a golf club head wherein an iron golf club head having a variable face profile into specific iron golf club head chassis resulting in an Effective Stiffness Area Ratio of between about 4.5 to 5.5 and a Coefficient of Restitution value as a function of the above Effective Stiffness Area Ratio.
Claims
exact text as granted — not AI-modified1 . An iron golf club head comprising:
a frontal portion having a striking face defining a face height (H Face ),
said striking face further comprising a substantially planar frontal surface and a non-planar rear surface,
said non-planar rear surface of said striking face forming a VFT profile, said VFT profile further comprising a thickened central portion, a transition portion, and a thinned perimeter portion,
said thinned perimeter portion defining a face thickness (T Face ),
said thickened central portion defining a VFT height (H VFT ) and a VFT thickness (T VFT ),
a body portion attached to a rear of said frontal portion, said iron golf club head defining a boundary height (H Boundary ) and a boundary thickness (T Boundary ), said iron golf club head having an ESA Ratio of between about 4.5 and 5.5, said ESA Ratio defined as,
ESA
Ratio
=
0.5
*
T
Boundary
*
H
Boundary
(
H
Face
*
T
Face
)
+
(
0
.
5
*
(
T
VFT
-
T
Face
)
*
H
VFT
,
and
said golf club head has a COR defined by the relationship below;
COR≥0.0196(ESA Ratio)+0.7211.
2 . The iron golf club head of claim 1 , wherein said iron golf club head has an ESA Face of between about 80 mm 2 to about 110 mm 2 , said ESA Face defined as,
ESA Face =( H Face *T Face )+(0.5*( T VFT −T Face )* H VFT .
3 . The iron golf club head of claim 2 , wherein said ESA Face is between about 90 mm 2 to about 100 mm 2 .
4 . The iron golf club head of claim 3 , wherein said ESA Face is about 95 mm 2 .
5 . The iron golf club head of claim 2 , wherein said iron golf club head has an ESA Boundary of between about 380 mm 2 to about 420 mm 2 , said ESA Boundary defined as.
ESA Boundary =0.5* T Boundary *H Boundary .
6 . The iron golf club head of claim 5 , wherein said ESA Boundary is between about about 390 mm 2 to about 410 mm 2 .
7 . The iron golf club head of claim 6 , wherein said ESA Boundary is about 400 mm 2 .
8 . The iron golf club head of claim 1 , wherein said thickened central portion has said VFT thickness (T VFT ) of between about 1.9 mm and about 2.3 mm, said VFT height (H VFT ) of between about 10 mm to about 27 mm, and a VFT width (W VFT ) of between about 15 mm to about 35 mm.
9 . The iron golf club head of claim 8 , wherein said VFT thickness (T VFT ) is between about 2.0 mm and about 2.2 mm, said VFT height (H VFT ) is between about 15 mm to about 22 mm, and said VFT width (W VFT ) is between about 20 mm to about 30 mm.
10 . The iron golf club head of claim 9 , wherein said VFT thickness (T VFT ) is about 2.1 mm, said VFT height (H VFT ) is about 18 mm, and said VFT width (W VFT ) about 26 mm.
11 . An iron golf club head comprising:
a frontal portion having a striking face defining a face height (H Face ),
said striking face further comprising a substantially planar frontal surface and a non-planar rear surface,
said non-planar rear surface of said striking face forming a VFT profile, said VFT profile further comprising a thickened central portion, a transition portion, and a thinned perimeter portion,
said thinned perimeter portion defining a face thickness (T Face ),
said thickened central portion defining a VFT height (H VFT ) and a VFT thickness (T VFT ),
a body portion attached to a rear of said frontal portion, said iron golf club head defining a boundary height (H Boundary ) of between about 35 mm to about 40 mm and a boundary thickness (T Boundary ) of between about 18 mm to about 24 mm, said iron golf club head having an ESA Ratio of between about 4.5 and 5.5, said ESA Ratio defined as,
ESA
Ratio
=
0.5
*
T
Boundary
*
H
Boundary
(
H
Face
*
T
Face
)
+
(
0
.
5
*
(
T
VFT
-
T
Face
)
*
H
VFT
,
and
said golf club head has a COR defined by the relationship below;
COR≥0.0196(ESA Ratio)+0.7211.
12 . The iron golf club head of claim 11 , wherein said boundary height (H Boundary ) is between about 36 mm to about 39 mm and said boundary thickness (T Boundary ) is between about 19 mm to about 23 mm.
13 . The iron golf club head of claim 12 , wherein said boundary height (H Boundary ) is between about 37 mm to about 38 mm and said boundary thickness (T Boundary ) is between about 20 mm to about 22 mm.
14 . The iron golf club head of claim 13 , wherein said iron golf club head has an ESA Boundary of between about 380 mm 2 to about 420 mm 2 , said ESA Boundary defined as.
ESA Boundary =0.5* T Boundary *H Boundary .
15 . The iron golf club head of claim 14 , wherein said ESA Boundary is between about 390 mm 2 to about 410 mm 2 .
16 . The iron golf club head of claim 15 , wherein said ESA Boundary is about 400 mm 2 .
17 . An iron golf club head comprising:
a frontal portion having a striking face defining a face height (H Face ),
said striking face further comprising a substantially planar frontal surface and a non-planar rear surface,
said non-planar rear surface of said striking face forming a VFT profile, said VFT profile further comprising a thickened central portion, a transition portion, and a thinned perimeter portion,
said thinned perimeter portion defining a face thickness (T Face ),
said thickened central portion defining a VFT height (H VFT ) and a VFT thickness (T VFT ),
a body portion attached to a rear of said frontal portion, said iron golf club head defining a boundary height (H Boundary ) of between about 35 mm to about 40 mm and a boundary thickness (T Boundary ) of between about 18 mm to about 24 mm, wherein said iron golf club head has an ESA Boundary of between about 380 mm 2 to about 420 mm 2 , said ESA Boundary defined as.
ESA Boundary =0.5* T Boundary *H Boundary .
18 . The iron golf club head of claim 17 , wherein said ESA Boundary is between about about 390 mm 2 to about 410 mm 2 .
19 . The iron golf club head of claim 18 , wherein said ESA Boundary is about 400 mm 2 .
20 . The iron golf club head of claim 19 , wherein said thickened central portion has said VFT thickness (T VFT ) of between about 1.9 mm and about 2.3 mm, said VFT height (H VFT ) of between about 10 mm to about 27 mm, and a VFT width (W VFT ) of between about 15 mm to about 35 mm.Join the waitlist — get patent alerts
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