U.S. patent application number 10/430946 was filed with the patent office on 2003-10-23 for steel golf club head having reduced face thickness and optimum distributed mass.
Invention is credited to Stites, John Thomas III.
Application Number | 20030199331 10/430946 |
Document ID | / |
Family ID | 29216013 |
Filed Date | 2003-10-23 |
United States Patent
Application |
20030199331 |
Kind Code |
A1 |
Stites, John Thomas III |
October 23, 2003 |
Steel golf club head having reduced face thickness and optimum
distributed mass
Abstract
A golf club head is comprised of cryogenically treated steel
resulting in the striking face having a reduced face thickness of
between 0.115 inches and 0.130 inches, and therefore, a reduced
striking face mass. Extra material which is eliminated from the
striking face, is distributed in other areas of the club head to
enhance performance. In an iron club head embodiment, the club head
includes a heel portion, toe portion, bottom sole portion, top
ridge portion, hosel portion, striking face, rear surface, and
peripheral mass on the rear surface which forms a rear cavity. A
cantilevered mass extends from the bottom sole portion toward the
top ridge portion within the rear cavity, spaced apart from the
rear surface. In a wood club head embodiment, the club head
includes a hollow body having an inner cavity delimited by a sole
portion, a striking face, a heel portion, a toe portion, and a
crown portion which links the striking face, toe portion, and heel
portion. A weight chip of higher density material is located along
the sole portion of the head. The iron and wood embodiments enjoy
an optimum weight distribution which is below and behind the sweet
spot, producing higher trajectory golf shots and more forgiving
off-center hits.
Inventors: |
Stites, John Thomas III;
(Fort Worth, TX) |
Correspondence
Address: |
Scott A. McCollister
FAY, SHARPE, FAGAN, MINNICH & McKEE, LLP
7th Floor
1100 Superior Ave.
Cleveland
OH
44114
US
|
Family ID: |
29216013 |
Appl. No.: |
10/430946 |
Filed: |
May 7, 2003 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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10430946 |
May 7, 2003 |
|
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|
09616599 |
Jul 14, 2000 |
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Current U.S.
Class: |
473/290 ;
473/291; 473/345; 473/349; 473/350 |
Current CPC
Class: |
A63B 2053/0491 20130101;
A63B 60/02 20151001; A63B 53/005 20200801; A63B 53/0408 20200801;
A63B 53/0466 20130101; A63B 53/047 20130101; A63B 53/0433
20200801 |
Class at
Publication: |
473/290 ;
473/291; 473/345; 473/349; 473/350 |
International
Class: |
A63B 053/04 |
Claims
Having thus described the preferred embodiments, the invention is
now claimed to be:
1. An iron type golf club head comprising: a heel portion, a toe
portion, a bottom sole portion, a top ridge portion, a hosel
portion, a striking face having a primary striking zone, a rear
surface, a peripheral mass formed on the rear surface adjacent said
heel, toe, bottom sole, and top ridge portions, said peripheral
mass defining a rear cavity, a bottom of said rear cavity being
defined by said rear surface; and a cantilevered mass extending
from the bottom sole portion toward the top ridge portion within
the rear cavity, said cantilevered mass being spaced apart from the
rear surface.
2. The iron type golf club head according to claim 1, wherein the
primary striking zone of the striking face has a thickness between
0.115 inches and 0.135 inches.
3. The iron type golf club head according to claim 2, wherein the
primary striking zone of the striking face has a thickness between
0.115 and 0.120 inches.
4. The iron type golf club head according to claim 2, wherein the
primary striking zone of the striking face has a thickness between
0.120 and 0.125 inches.
5. The iron type golf club head according to claim 2, wherein the
primary striking zone of the striking face has a thickness between
0.125 and 0.135 inches.
6. The iron type golf club head according to claim 1, wherein the
cantilevered mass is positioned below and behind the primary
striking zone of the striking face.
7. The iron type golf club head according to claim 6, wherein the
cantilevered mass is disposed toward the heel portion.
8. The iron type golf club head according to claim 1, wherein the
cantilevered mass tapers from a thickness that is greatest at the
sole portion toward the top ridge portion.
9. The iron type golf club head according to claim 8, wherein the
cantilevered mass is smoothly contoured on a back side and
substantially flat on a front side, said substantially flat front
side being substantially parallel to the rear surface.
10. The iron type golf club head according to claim 2, wherein the
golf club head is comprised of cryogenically treated steel.
11. The iron type golf club head according to claim 9, wherein the
cryogenically treated steel is controllably cooled to approximately
-300 degrees Fahrenheit.
12. A metal wood type golf club head comprising: a hollow body
having an inner cavity delimited by a sole portion, a striking face
having a primary striking zone, a heel portion having an opening
defining a shaft axis for the introduction of a shaft, a toe
portion, and a crown portion linking said striking face, said toe
portion, and said heel portion, wherein the hollow body is
comprised of cryogenically treated steel; a weight chip located
along the sole portion of the head, said head having a center of
gravity substantially closer to the sole portion than said crown
portion; and wherein the primary striking zone of the striking face
has a thickness between 0.130 and 0.135 inches.
13. The metal wood type golf club head according to claim 12,
wherein the primary striking zone of the striking face has a
thickness of approximately 0.130 inches.
14. The metal wood type golf club head according to claim 12,
wherein the cryogenically treated steel is controllably cooled to
approximately -300 degrees Fahrenheit.
15. The metal wood type golf club head according to claim 13,
wherein the weight chip is welded into a weight insert pocket on
the sole portion.
16. The metal wood type golf club head according to claim 15,
wherein the weight chip is made of a higher density material than
the body.
17. The metal wood type golf club head according to claim 16,
wherein the weight chip is made of tungsten or a tungsten-based
alloy.
18. The metal wood type golf club head according to claim 17,
wherein the weight chip has a mass between 25 and 45 grams.
19. A iron set comprising a plurality of irons having increasing
size numbers, said irons each having an iron head comprising: a
heel portion, a toe portion, a bottom sole portion, a top ridge
portion, a hosel portion, a striking face having a primary striking
zone, a rear surface, a peripheral mass formed on the rear surface
adjacent said heel, toe, bottom sole, and top ridge portions, said
peripheral mass defining a rear cavity, a bottom of said rear
cavity being defined by said rear surface; and a cantilevered mass
extending from the bottom sole portion toward the top ridge portion
within the rear cavity, said cantilevered weight mass being spaced
apart from the rear surface.
20. The iron set according to claim 19, wherein the primary
striking zone of each iron head has a thickness between 0.115 and
0.135 inches.
21. The iron set according to claim 20, wherein each iron head is
comprised of cryogenically treated steel.
22. The iron set according to claim 21, wherein the cantilevered
mass tapers from a thickness that is greatest at the sole portion
toward the top ridge portion.
23. The iron set according to claim 22, wherein the cantilevered
mass is smoothly contoured on a back side and substantially flat on
a front side, said substantially flat front side being
substantially parallel to the rear surface.
24. The iron set according to claim 23, wherein depending on the
size number of the iron, the cantilevered mass is located in one of
(1) a first position which is disposed toward the heel portion; (2)
a second position which is disposed medially along the sole
portion; and (3) a third position which is disposed toward the toe
portion.
25. A method of making a golf club head, said method comprising:
forming a club head having a primary striking zone, a top portion,
a bottom portion, a toe portion, and a heel portion, wherein at
least the striking face of the club head is cryogenically treated
steel, the primary striking zone having at least a portion having a
thickness between 0.115 inches and 0.135 inches, said face
thickness resulting in a reduced striking zone mass; and,
distributing mass not used in the reduced striking zone mass about
at least one of the striking face, the top portion, the bottom
portion, the toe portion, the heel portion.
26. The method according to claim 25, wherein in a wood-type golf
club head, step (c) includes: welding a weight chip into a weight
insert pocket on the bottom portion of the club head, wherein the
weight chip is made of a higher density material than the
cryogenically treated steel.
27. The method according to claim 25, wherein in an iron-type golf
club head, step (c) includes: forming a peripheral mass on a rear
surface of the striking face, said peripheral mass defining a rear
cavity; and, forming a cantilevered mass extending from the bottom
portion toward the top portion within the rear cavity, said
cantilevered mass being spaced apart from the rear surface.
28. A method of constructing a golf club head comprising:
assembling the golf club head including a striking face, a top
portion, a bottom portion, a toe portion, and a heel portion; and
cryogenically treating the assembled golf club head; or
cryogenically treating a striking face; and assembling the striking
face in contact with a top portion, a bottom portion, a toe
portion, and a heel portion.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to the art of golf clubs and,
more particularly, to iron type and wood type golf club heads
weighted for improved performance.
[0002] Golf clubs comprise a shaft and a club head and are
generally classified into three categories: woods, irons, and
putters. Irons are classified by loft angle. Irons with low loft
angles, e.g. 20.degree.-30.degree., are classified as long irons,
while irons with large loft angles, e.g. 40.degree.-50.degree., are
classified as short irons. Typically irons are numbered from long
to short, i.e. 1, 2, 3, 4, 5, 6, 7, 8, 9, PW (pitching wedge), SW
(sand wedge), and LW (lob wedge). Irons include a head joined to a
hosel and a shaft with the shaft being attached to the head by
fitting the shaft into a bore formed in the hosel. The hosel is
typically attached to and formed integrally with the head of an
iron. Conventionally, the golf club head includes a heel, a bottom
sole, a toe, a planar striking face and a back side.
[0003] Golfing irons can be said to be either a traditional design
wherein the iron is forged and has a generally continuous back
portion on the club blade or of a second type of design known as
cavity back. In the cavity back design, the back portion of the
club blade includes a substantial depression or cavity which has
the effect of providing perimeter weighting for the club head.
Traditionally, cavity back clubs which include perimeter weighting
have shown to provide a larger "sweet spot" or striking area such
that a ball need not be struck precisely in the center of mass of
the club to produce an acceptable golf shot.
[0004] In designing wood and iron club heads, factors such as
weight distribution, overall finish weight, and center of gravity
are of importance. In an effort to reduce the overall finish weight
of a club, lighter and stronger materials have been used.
Conventional wooden club heads have been replaced by stainless
steel club heads which have, in turn, been replaced by titanium
club heads. Titanium has proven to be a desirable material because
of its strength and reduced mass. However, titanium is quite
expensive. Therefore, a need exists for a golf club head comprised
of a cost-effective, light-weight, and strong material. In
addition, an optimized weight distribution which enhances overall
performance is desired.
[0005] The present invention contemplates new and improved golf
club heads which overcome the above-referenced problems and
others.
SUMMARY OF THE INVENTION
[0006] In accordance with one aspect of the present invention, an
iron type golf club head includes a heel portion, toe portion,
bottom sole portion, top ridge portion, a hosel portion, a striking
face which contains a primary striking zone, and a rear surface. A
peripheral mass is formed on the rear surface adjacent the heel,
toe, bottom sole, and top ridge portions. The peripheral mass
defines a rear cavity where the bottom of the rear cavity is
defined by the rear surface. A cantilevered mass extends from the
bottom sole portion toward the top ridge portion within the rear
cavity. The cantilevered mass is spaced apart from the rear
surface.
[0007] In accordance with a more limited aspect of the present
invention, the primary striking zone of the striking face has a
thickness between 0.115 inches and 0.135 inches. Further, the iron
type golf club head is comprised of cryogenically treated
steel.
[0008] In accordance with another aspect of the present invention,
a metal wood type golf club head includes a hollow body having an
inner cavity delimited by a sole portion, a striking face having a
primary striking zone, a heel portion having an opening defining a
shaft axis for the introduction of a shaft, a toe portion, and a
crown portion linking the striking face, toe portion, and heel
portion. A higher density weight chip is located along the sole
portion, providing a center of gravity which is substantially
closer to the sole portion than the crown portion.
[0009] In accordance with a more limited aspect of the present
invention, the primary striking zone of the striking face has a
thickness between 0.130 inches and 0.135 inches.
[0010] In accordance with another aspect of the present invention,
an iron set includes a plurality of irons having increasing size
numbers. Each iron head of the iron set includes a heel portion,
toe portion, bottom sole portion, top ridge portion, a hosel
portion, a striking face which contains a primary striking zone,
and a rear surface. A peripheral mass is formed on the rear surface
adjacent the heel, toe, bottom sole, and top ridge portions. The
peripheral mass defines a rear cavity where the bottom of the rear
cavity is defined by the rear surface. A cantilevered mass extends
from the bottom sole portion toward the top ridge portion within
the rear cavity. The cantilevered mass is spaced apart from the
rear surface.
[0011] In accordance with a more limited aspect of the present
invention, the primary striking zone of each striking face has a
thickness between 0.115 inches and 0.135 inches. Further, the iron
heads are comprised of cryogenically treated steel.
[0012] In accordance with another aspect of the present invention,
a method of making a golf club head includes forming the club head
having a primary striking zone, a top portion, a bottom portion, a
toe portion, and a heel portion, wherein at least the striking face
of the club head is cryogenically treated steel. The primary
striking zone has at least a portion having a thickness between
0.115 inches and 0.135 inches, where the face thickness results in
a reduced striking zone mass. The method further includes
distributing mass not used in the reduced striking zone mass about
at least one of the striking face, the top portion, the bottom
portion, the toe portion, the heel portion.
[0013] In accordance with another aspect of the present invention,
a method of constructing a golf club head includes assembling the
golf club head including a striking face, a top portion, a bottom
portion, a toe portion, and a heel portion, and cryogenically
treating the assembled golf club head. Alternatively, the method
includes cryogenically treating a striking face and assembling the
striking face in contact with a top portion, a bottom portion, a
toe portion, and a heel portion.
[0014] One advantage of the present invention is that it has a
reduced face thickness.
[0015] Another advantage of the present invention is that it
provides optimized weight distribution.
[0016] Another advantage of the present invention is that it
provides a lower center of gravity.
[0017] Another advantage of the present invention is that it
provides greater distance and accuracy for off-center hits.
[0018] Another advantage of the present invention is that it
provides enhanced energy transfer.
[0019] Yet another advantage of the present invention resides in
the welding of a tungsten weight clip in the sole portion of the
wood type club.
[0020] Still another advantage of the present invention resides in
variable positioning of the cantilevered mass depending on the iron
size number.
[0021] Other benefits and advantages of the present invention will
become apparent to those skilled in the art upon a reading and
understanding of the preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The invention may take form in various components and
arrangements of components, and in various steps and arrangements
of steps. The drawings are only for purposes of illustrating
preferred embodiments and are not to be construed as limiting the
invention.
[0023] FIG. 1 is a front view of an iron in accordance with the
present invention;
[0024] FIG. 2 is a back view of an iron club head in accordance
with the present invention;
[0025] FIG. 3 is a side cross-sectional view along line z-z of the
iron club head of FIG. 2;
[0026] FIG. 4 is a front view of an iron club head in accordance
with the present invention;
[0027] FIGS. 5A, 5B, and 5C are back views illustrating alternate
positions for the cantilevered mass on iron club heads in
accordance with the present invention;
[0028] FIG. 6 is a front view of a metal wood in accordance with
the present invention;
[0029] FIG. 7 is a side cross-sectional view of a metal wood club
head in accordance with the present invention;
[0030] FIG. 8 is a sole view of the metal wood club head in
accordance with the present invention;
[0031] FIG. 8A is a perspective view of the weight chip which is
welded to the metal wood club head in accordance with the present
invention; and,
[0032] FIG. 9 is a front view of the metal wood club head in
accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0033] With reference to FIG. 1, an iron 10 comprises a shaft 12
with a grip 14 and a head 16. The head 16 is connected by a hosel
18 to the shaft 12 in a conventional manner. Similarly, the grip 14
is attached to the shaft 12 in a conventional manner. The head 16
comprises a toe portion 20, heel portion 22, sole portion 24 and
top ridge portion 26. The finished club height 28 progressively
decreases from long irons, e.g. 2, 3, 4, to short irons, e.g. 8, 9,
PW. The front striking face 30, which contains a primary striking
zone or sweet spot 32, is suitably scored with grooves.
[0034] FIG. 2 illustrates a back view of the iron club head 16. A
peripheral mass 36 is formed on the rear surface 34 of the club
head 16, defining a rear cavity 38. Artisans will appreciate that
cavity back or perimeter weighted clubs enjoy a larger sweet spot
or hitting area than conventional forged irons. As shown in FIG. 2,
a cantilevered mass 40 extends from the bottom sole portion 24
toward the top ridge portion 26 within the rear cavity 38. As will
be described more fully below, the cantilevered mass 40 is variably
positioned along the bottom sole portion 24 below and behind a
primary striking zone or sweet spot 32 of the striking face 30. The
location of the cantilevered mass 40 below and behind the sweet
spot lowers the center of gravity of the club which aids the golfer
in placing the center of gravity of the club head below the center
of gravity of the golf ball at the moment of impact, producing a
properly airborne and solidly hit ball having a high
trajectory.
[0035] As shown in FIG. 3 (side view), the cantilevered mass 40 is
spaced apart from the rear surface 34 of the club head. It is to be
appreciated that spacing the cantilevered mass 40 apart from the
rear surface 34 provides forgiveness for off-center hits. In other
words, golfers may still produce acceptable shots despite striking
the ball in a location on the striking face 30 other than the
center or sweet spot 32. The cantilevered mass 40 tapers from a
thickness that is greatest at the sole portion 24 toward the top
ridge portion 26.
[0036] With reference to FIGS. 5A, 5B, and 5C, for an iron set
consisting of 2, 3, 4, 5, 6, 7, 8, 9, PW, and SW, the cantilevered
mass 40 is disposed in one of three positions along the bottom sole
portion 24 between the heel portion 22 and the toe portion 20. The
cantilevered mass is progressively moved from the low heel area
(FIG. 5A) on long irons (2-4), to a middle position (FIG. 5B) on
the middle irons (5-7), to a higher position toward the toe (FIG.
5C) on the short irons (8-SW). It is to be appreciated that varying
the position of the cantilevered mass 40 varies the center of
gravity for the club, and therefore, provides for optimum
trajectory and launch angle for each golf shot. In one preferred
embodiment, the cantilevered mass 40 is located approximately 1.00
inches from the heel portion in the long irons (FIG. 5A),
approximately 1.187 inches from the heel portion in the middle
irons (FIG. 5B), and approximately 1.375 inches from the heel
portion in the short irons (FIG. 5C).
[0037] In a preferred embodiment, each iron club head 16 is
comprised of a cryogenically treated steel. Artisans will
appreciate that cryogenic treatment of metals, including steel,
results in greater hardness and tensile strength than untreated
metals. For example, cryogenic treatment of standard 17-4 pH steel
results in a steel which is harder and stronger than both 6-4
titanium and alpha maraging steel. Because of the increased
hardness and strength of cryogenically treated steel, the striking
face thickness FT of the club head is thinner than conventional
irons. In one embodiment, the striking face thickness FT is reduced
from 0.145 inches to 0.130 inches. This reduction in face thickness
FT results in a reduction of approximately 15 grams in striking
face mass. This additional mass that is not present in the striking
face is relocated other regions of the club head in order to
enhance overall performance. Preferably, this additional mass is
located in the peripheral mass and the cantilevered mass, resulting
in a lower center of gravity and enhanced performance.
[0038] During the cryogenic treatment process, the temperature of
the golf club head is slowly and gradually lowered to approximately
-300 degrees Fahrenheit in a nitrogen gas-filled chamber. As the
steel is supercooled, molecular movement is decreased and the
molecules join together more tightly. As the temperature is
gradually increased, the molecules remain closer together in a more
uniform and dense formation, resulting in a stronger and harder
substance. It is to be appreciated that a cryogenically treated
steel golf club head produces greater energy transfer which
translates into added distance in golf shots.
[0039] In a preferred embodiment, the following reduced face
thicknesses FT in the primary striking zone or sweet spot 32 are
present:
[0040] 2-5 iron: 0.125-0.135 inches,
[0041] 6-7 iron: 0.120-0.125 inches, and
[0042] 8-PW: 0.115-0.120 inches.
[0043] For a preferred set of irons made in accordance with the
present invention, the following dimensions are provided:
1TABLE A-1 Loft Lie Bounce Off- Hosel Face Scoreline Angle Angle
Angle set Length Length Length (A) (B) (C) (D) (E) (G) (H) Club
(deg) (deg) (deg) (in.) (in.) (in.) (in.) 1 16 57.5 0 .230 2.450
2.925 2.325 2 18 58.5 0 .220 2.450 2.325 3 21 59.5 +1 .220 2.450
2.925 2.325 4 24 60.5 +2 .190 2.450 2.925 2.325 5 27 61 +2 .190
2.450 2.925 2.325 6 31 61.5 +3 .175 2.450 2.925 2.325 7 35 62 +8
.160 2.450 2.925 2.325 8 39 62.5 +3 .145 2.450 2.850 2.250 9 43 63
+4 .130 2.450 2.850 2.250 PW 47 63.5 +6 .115 2.450 2.850 2.250 SW
55 64 +10 .100 2.450 2.850 2.250
[0044]
2TABLE B-1 Sole Sole Sole Hosel Hosel Width Width Width Ref. to to
Face Heel Center Toe Dimension Heel Center Height Finish (I) (J)
(K) (L) (M) (N) (O) Weight Club (in.) (in.) (in.) (in.) (in.) (in.)
(in.) (grams) 1 .600 .800 .700 .600 .135 1.057 2.045 232 2 .600
.800 .700 .600 .145 1.074 2.075 239 3 .600 .800 .700 .600 .155
1.096 2.105 245 4 .600 .800 .700 .600 .165 1.116 2.135 251 5 .600
.800 .700 .600 1.75 1.134 2.165 257 6 .600 .800 .700 .600 .185
1.149 2.195 264 7 .600 .800 .700 .600 .195 1.165 2.225 271 8 .600
.800 .700 .600 .205 1.172 2.235 278 9 .600 .800 .700 .600 .215
1.187 2.273 285 PW .600 .800 .700 .600 .225 1.208 2.294 293 SW .600
.800 .700 .600 .235 1.223 2.400 306
[0045] With reference to FIG. 6 and FIG. 7, a wood type golf club
100 comprises a shaft 112 with a grip 114 and a head 116. The head
116 is connected by a hosel 118 to the shaft 112 in a conventional
manner. Similarly, the grip 114 is attached to the shaft 112 in a
conventional manner. The head comprises a hollow body 136 having an
inner cavity delimited by a sole portion 124. Additionally, the
head 116 includes a toe portion 120, heel portion 122, and a crown
portion 126. The front striking face 130, which contains a primary
striking zone or sweet spot 132, is suitably scored with
grooves.
[0046] FIG. 8 illustrates a sole view of the club head 116. The
sole portion 124 of the club head contains a pocket 150 in which a
weight chip 154 is disposed. In a preferred embodiment, the weight
chip 154 is welded to the sole portion 124 inside the pocket 150 by
a plurality of welds 160 disposed in a weld groove 158, as shown in
FIG. 8A. While other means of fastening the weight chip to the sole
portion, such as adhesives, fasteners and pressing, are
contemplated, it is to be appreciated that welding provides a
stronger and more permanent bond between the club head 116 and the
weight chip.
[0047] In a preferred embodiment, the club head 116 is comprised of
a cryogenically treated steel. As set forth above, it is to be
appreciated that cryogenically treated steel provides greater
hardness and tensile strength than conventional club head
materials. Because of the increased hardness and strength of
cryogenically treated steel, the striking face thickness of the
club head is thinner than conventional metal woods. In a preferred
embodiment, the primary striking zone or sweet spot of the striking
face is between 0.130 and 0.135 inches. The reduction is striking
face thickness results in a reduction of the mass of the striking
face. In one embodiment, the additional mass not used in the
thinner club face, is distributed around the sole portion and crown
portion of the club head in order to enhance overall weighting and
performance. In another embodiment, the additional mass is not
distributed about the club head, resulting in a club having reduced
mass.
[0048] In a preferred embodiment, the weight chip is made out of
tungsten having a mass of between 25 and 45 grams, preferably, 35
grams. Alternately, the weight chip is made of another metal which
has a density greater than the density of the cryogenic steel of
the club body. As shown in FIG. 9, the presence of the tungsten
weight chip in the sole portion of the club head lowers the overall
center of gravity CG of the club head versus a conventional center
of gravity CG.sub.1. It is to be appreciated that the lower center
of gravity promotes more consistent distance and accuracy from
off-center hits as well as a higher trajectory. Artisans will
appreciate that the lower center of gravity promotes solid contact
with balls which are in undesirable locations, such as long grass,
dirt, and tight lies, i.e. where little or no grass is present
under the ball. For a preferred set of woods made in accordance
with the present invention, the following dimensions are
provided:
3TABLE A-2 Face Face Loft Lie Face Roll Bulge Face Crown Angle
Angle Angle Radius Radius Height Height (A) (B) (C) (D) (E) (F) (G)
Club (deg) (deg) (deg) (in.) (in.) (in.) (in.) 1 9 55.5 +2 open 12
12 1.700 1.850 3 14 57 0 12 14 1.250 1.350 5 18 58 0 12 14 1.200
1.300
[0049]
4TABLE B-2 Hosel Hosel Face Hosel Hosel Hosel Bore Bore Sole Length
Length Diameter Diameter Depth Radius Breadth Finish (H) (I) (J)
(K) (L) (M) (N) Weight Club (in.) (in.) (in.) (in.) (in.) (in.)
(in.) (grams) 1 3.500 2.500 .500 .339 1.375 P.M. 3.075 205 3 3.200
2.150 .500 .339 1.375 P.M. 3.050 209 5 3.100 2.100 .500 .339 1.375
P.M. 2.950 214
[0050] The invention has been described with reference to the
preferred embodiment. Modifications and alterations will occur to
others upon a reading and understanding of the preceding detailed
description. It is intended that the invention be construed as
including all such modifications and alterations insofar as they
come within the scope of the appended claims or the equivalents
thereof.
* * * * *