Golf club head with improved striking face
A golf club head with improved striking face is disclosed. More specifically, the present invention relates to a golf club head wherein the striking face is further comprised out of a thickened central region, located near a geometric center of the striking face portion, a central transition region extending outward radially from the thickened central region, a thinned intermediate region, extending outward radially from the central transition region, a thickened stress reducing region, extending outward radially from the thinned intermediate region, and a thinned perimeter region, extending outward radially from the thickened stress reducing region, all of which combine to form the improved striking face.
1 . A golf club head comprising:
a striking face portion, located at a frontal portion of said golf club head, adapted to impact a golf ball; and
a body portion, attached to a rear of said striking face portion,
wherein said striking face portion further comprises;
a frontal striking surface, wherein said frontal striking surface is substantially planar, and
an internal rear surface,
wherein said frontal striking surface and said internal rear surface combine to further comprise;
a thickened central region having a first thickness,
a central transition region, extending outward from said thickened central region, having a variable thickness, wherein said central transition region comprises:
a toeward central transition region having a height H 2 - c,
a heelward central transition region having a height H 2 - d,
a thinned intermediate region, extending outward from said central transition region, having a third thickness, wherein said thinned intermediate region comprises:
a toeward thinned intermediate region having a height H 3 - c,
a heelward thinned intermediate region having a height H 3 - d,
a thickened stress reducing region, extending outward from said thinned intermediate region, having a fourth thickness, and
a thinned perimeter region, extending outward from said thickened stress reducing region, having a fifth thickness,
wherein said thickened stress reducing region protrudes rearward from said internal rear surface of said striking face portion, and
wherein said height H 2 - c in addition to said height H 3 - c is different than said height H 2 - d in addition to said height H 3 - d,
wherein said fourth thickness is greater than said first thickness.
2 . The golf club head of claim 1 , wherein said fourth thickness of said thickened stress reducing region is a thickest portion of said striking face portion.
3 . The golf club head of claim 2 , wherein said fifth thickness is greater than said third thickness.
4 . The golf club head of claim 1 , wherein said thickened stress reducing region has a T over H Ratio of between about 0.5 to about 1.3, said T over H ratio defined as
T
over
H
Ratio
=
Thickness
T
4
of
Thickened
Stress
Reducing
Region
Height
H
4
of
Thickened
Stress
Reducing
Region
.
5 . The golf club head of claim 4 , wherein said T over H ratio is between about 0.7 to about 1.0.
6 . The golf club head of claim 5 , wherein said T over H ratio is about 0.8.
7 . The golf club head of claim 4 , wherein said thickened stress reducing region further comprises:
an upper thickened stress reducing region, and
a lower thickened stress reducing region,
wherein said upper thickened stress reducing region and said lower thickened stress reducing region has a same height.
8 . The golf club head of claim 4 , wherein said thickened stress reducing region further comprises;
an upper thickened stress reducing region, and
a lower thickened stress reducing region,
wherein said upper thickened stress reducing region and said lower thickened stress reducing region has a different height.
9 . The golf club head of claim 8 , wherein a height of said upper thickened stress reducing region is smaller than a height of said lower thickened stress reducing region.
10 . The golf club head of claim 9 , wherein said height of said upper thickened stress reducing region is about 0.5 mm smaller than said height of said lower thickened stress reducing region.
11 . The golf club head of claim 1 , wherein said height H 2 - c in addition to said height H 3 - c is smaller than said height H 2 - d in addition to said height H 3 - d.
12 . The golf club head of claim 1 , wherein said height H 2 - c in addition to said height H 3 - c is greater than said height H 2 - d in addition to said height H 3 - d.
13 . The golf club head of claim 1 , wherein said height H 2 - c is different than said height H 2 - c.
14 . A golf club head comprising:
a striking face portion, located at a frontal portion of said golf club head, adapted to impact a golf ball; and
a body portion, attached to a rear of said striking face portion,
wherein said striking face portion further comprises;
a frontal striking surface, wherein said frontal striking surface is substantially planar, and
an internal rear surface,
wherein said frontal striking surface and said internal rear surface combine to further comprise;
a thickened central region having a first thickness,
a central transition region, extending outward from said thickened central region, having a variable thickness, wherein said central transition region comprises:
a toeward central transition region having a height H 2 - c,
a heelward central transition region having a height H 2 - d,
a thinned intermediate region, extending outward from said central transition region, having a third thickness, wherein said thinned intermediate region comprises:
a toeward thinned intermediate region having a height H 3 - c,
a heelward thinned intermediate region having a height H 3 - d,
a thickened stress reducing region, extending outward from said thinned intermediate region, having a fourth thickness, and
a thinned perimeter region, extending outward from said thickened stress reducing region, having a fifth thickness,
wherein said thickened stress reducing region protrudes rearward from said internal rear surface of said striking face portion,
wherein said height H 2 - c in addition to said height H 3 - c is smaller than said height H 2 - d in addition to said height H 3 - d
wherein said fifth thickness is less said fourth thickness, and
wherein said third thickness of said thinned intermediate region is a thinnest portion of said striking face portion.
15 . The golf club head of claim 14 , wherein said fourth thickness of said thickened stress reducing region is a thickest portion of said striking face portion.
16 . The golf club head of claim 14 , wherein said height H 2 - c is smaller than said height H 2 - d.
17 . A golf club head comprising:
a striking face portion, located at a frontal portion of said golf club head, adapted to impact a golf ball; and
a body portion, attached to a rear of said striking face portion,
wherein said striking face portion further comprises;
a frontal striking surface, wherein said frontal striking surface is substantially planar, and
an internal rear surface,
wherein said frontal striking surface and said internal rear surface combine to further comprise:
a thickened central region having a first thickness,
a central transition region, extending outward from said thickened central region, having a variable thickness, wherein said central transition region comprises:
a toeward central transition region having a height H 2 - c,
a heelward central transition region having a height H 2 - d,
a thinned intermediate region, extending outward from said central transition region, having a third thickness, wherein said thinned intermediate region comprises:
a toeward thinned intermediate region having a height H 3 - c,
a heelward thinned intermediate region having a height H 3 - d,
a thickened stress reducing region, extending outward from said central transition region and located proximate a perimeter of said striking face portion,
wherein said thickened stress reducing region protrudes rearward from said internal rear surface of said striking face portion, and wherein said height H 2 - c in addition to said height H 3 - c is smaller than said height H 2 - d in addition to said height H 3 - d.
18 . The golf club head of claim 17 , wherein said thickened stress reducing region has a T over H Ratio of between about 0.5 to about 1.3, said T over H ratio defined as
T
over
H
Ratio
=
Thickness
T
4
of
Thickened
Stress
Reducing
Region
Height
H
4
of
Thickened
Stress
Reducing
Region
.
19 . The golf club head of claim 18 , wherein said T over H ratio is between about 0.7 to about 1.0.
20 . The golf club head of claim 18 , wherein said T over H ratio is about 0.8.