U.S. patent application number 11/473640 was filed with the patent office on 2007-12-27 for adjustable putter.
Invention is credited to Bill Dworzan.
Application Number | 20070298904 11/473640 |
Document ID | / |
Family ID | 38874209 |
Filed Date | 2007-12-27 |
United States Patent
Application |
20070298904 |
Kind Code |
A1 |
Dworzan; Bill |
December 27, 2007 |
ADJUSTABLE PUTTER
Abstract
A golf putter comprises latitudinally elongated head having a
generally rectangular hitting face against a golf ball. The head
has an integral center plate extending longitudinally and rearward
from the hitting face at its bottom. The center plate has a visible
centerline for aiming at the ball. A ball joint for angularly
fixing a shaft to the head includes a frictional sphere attached to
the bottom end of the shaft. A truncated spherical socket is formed
by a middle section of the head and a clamp member screw fastened
to the head, whereby the shaft is locked in a truncated spherical
interior wall at an adjusted angle to the head. Two swappable posts
extend from the opposite side of the hitting face of the head near
its latitudinal edges, each post having a centrally threaded bore
and being threadedly attached to the head so that it may be
replaced by a body of varying weight for plugging a void created by
the threading of the post.
Inventors: |
Dworzan; Bill; (Santa Ana,
CA) |
Correspondence
Address: |
LAW OFFICES OF CLEMENT CHENG
17220 NEWHOPE STREET #127
FOUNTAIN VALLEY
CA
92708
US
|
Family ID: |
38874209 |
Appl. No.: |
11/473640 |
Filed: |
June 24, 2006 |
Current U.S.
Class: |
473/340 |
Current CPC
Class: |
A63B 53/0487 20130101;
A63B 53/0433 20200801; A63B 60/00 20151001; A63B 53/02 20130101;
A63B 53/065 20130101; A63B 53/0441 20200801; A63B 2053/0491
20130101; A63B 53/06 20130101; A63B 60/52 20151001 |
Class at
Publication: |
473/340 |
International
Class: |
A63B 53/00 20060101
A63B053/00 |
Claims
1. A golf putter comprising: a latitudinally elongated head having
a generally rectangular hitting face against a ball, the head
having an integral center plate extending longitudinally and
rearward from the hitting face at its bottom, the center plate
having a visible center line for aiming at the ball; a ball joint
for angularly fixing a shaft to the head, the joint including a
frictional sphere attached to the bottom end of the shaft, a
semi-spherical recess formed in the middle of the head facing away
from the hitting face less a semi-circular top opening for allowing
angular adjustment of the shaft, and a clamp member having a
complementary semi-spherical recess with a semi-circular top
opening and screw fastened centrally to the semi-spherical recess
of the head, whereby the shaft is locked in a truncated spherical
interior wall at an adjusted angle to the head two longitudinal
posts extending from the opposite side of the hitting face of the
head near its latitudinal edges, each the post having a centrally
threaded bore; two sets of longitudinal stacks of weight elements
having incremental thickness and screw fastened to the threaded
bore of the posts respectively, the weight elements being
selectively added or deleted to adjust the weight of the putter
locally in a plane parallel to the center plate; and at least one
elastic washer inserted between adjacent ones of the weight
elements in each set concentrically thereto to provide a bounce to
the putter.
2. The golf putter of claim 1, further comprising acute edges along
the boundaries of the semi-spherical recesses and semi-circular top
openings of both the head and clamp member whereby the frictional
sphere of the shaft in the ball joint is enhanced in clamping speed
as well as clamping force.
3. The golf putter of claim 1, wherein the weight elements are made
of metal shaped into single to multiple concentric washers, the
multiple washers being joined integrally to provide a visual
consistency allowing a quick addition or deletion of weight into a
target distribution of weight of the putter.
4. The golf putter of claim 1, wherein the weight elements are made
of composite materials including a metal and a plastic to provide
an eccentric weighting for extending the planar weight adjustment
to a vertical level of the putter.
5. The golf putter of claim 4, wherein the metal is copper.
6. A golf putter comprising: a latitudinally elongated head having
a generally rectangular hitting face against a golf ball, the head
having an integral center plate extending longitudinally and
rearward from the hitting face at its bottom, the center plate
having a visible center line for aiming at the ball; a ball joint
for angularly fixing a shaft to the head, the joint including a
frictional sphere attached to the bottom end of the shaft, a
semi-spherical recess formed in the middle of the head facing away
from the hitting face less a semi-circular top opening for allowing
angular adjustment of the shaft, and a clamp member having a
complementary semi-spherical recess with a semi-circular top
opening and screw fastened centrally to the semi-spherical recess
of the head, whereby the shaft is locked in a truncated spherical
interior wall at an adjusted angle to the head; two swappable posts
extending from the opposite side of the hitting face of the head
near its latitudinal edges, each the post having a centrally
threaded bore and being threadedly attached to the head so that it
may be replaced by a body of varying weight for plugging a void
created by the threading of the post; two sets of longitudinal
stacks of weight elements having incremental thickness and screw
fastened to the head selectively through the threaded bore of the
posts respectively to provide a first mode of expanded weight
distribution or through the clamp member to provide a second mode
of compacted weight positioning in a conventional putter head
contour, the weight elements being selectively added or deleted to
adjust the weight of the putter locally in a plane parallel to the
center plate; and at least one elastic washer inserted between
adjacent ones of the weight elements in each set concentrically
thereto to provide a bounce to the putter.
7. The golf putter of claim 6, further comprising acute edges along
the boundaries of the semi-spherical recesses and semi-circular top
openings of both the head and clamp member whereby the frictional
sphere of the shaft in the ball joint is enhanced in clamping speed
as well as clamping force.
8. The golf putter of claim 6, wherein the weight elements are made
of metal shaped into single to multiple concentric washers, the
multiple washers being joined integrally to provide a visual
consistency allowing a quick addition or deletion of weight into a
target distribution of weight of the putter.
9. The golf putter of claim 1, wherein the weight elements are made
of composite materials including a metal and a plastic to provide
an eccentric weighting for extending the planar weight adjustment
to a vertical level of the putter.
10. The golf putter of claim 9, wherein the metal is copper.
11. The golf putter of claim 6, wherein the weight element sets in
the compact mode cooperate to align and aim the head body and
assist the aiming center line of the center plate for the golfer to
hit the ball consistently.
12. A golf putter comprising: a putter head having a generally
rectangular face, the head having an integral alignment plate
extending longitudinally and rearward from the hitting face, the
center plate having a visible aiming center line; a shaft; a ball
joint angularly affixing the shaft to the putter head, the ball
joint having a sphere attached to the bottom end of the shaft, a
head recess allowing angular adjustment of the shaft; and a clamp
member having a complementary recess with a top opening, wherein
the clamp member is screw fastened to the head recess, wherein the
shaft is locked during use; two longitudinal posts extending from
the opposite side of the hitting face of the head near its
latitudinal edges, each the post having a centrally threaded bore;
two sets of longitudinal weight elements having incremental
thickness and screw fastened to the threaded bore of the posts
respectively, the weight elements being selectively added or
removed to adjust the weight of the putter locally in a plane
parallel to the center plate.
13. The golf putter of claim 12, wherein the sphere has a power
coat to control surface roughness.
14. The golf putter of claim 12, wherein the weight elements are
formed as stacks.
15. The golf putter of claim 12, further comprising at least one
elastic washer inserted between adjacent ones of the weight
elements in each set concentrically thereto to provide a bounce to
the putter.
16. The golf putter of claim 15, wherein the weight elements are
formed as stacks and wherein the weight elements are made of
composite materials including a metal and a plastic to provide an
eccentric weighting for extending the planar weight adjustment to a
vertical level of the putter.
17. The golf putter of claim 15, further comprising surface grooves
on the hitting face.
18. The golf putter of claim 12, wherein the head recess and the
complementary recess provide a double ring clamp configuration.
19. The golf putter of claim 18, wherein the weight elements are
formed as stacks.
20. The golf putter of claim 18, wherein the weight elements are
made of composite materials including a metal and a plastic to
provide an eccentric weighting for extending the planar weight
adjustment to a vertical level of the putter.
Description
BACKGROUND OF THE INVENTION
[0001] A. Field of the Invention
[0002] The present invention relates to golf putters, and more
particularly, an adjustable putter for its weighting, lie, loft,
grip rotation right or left.
[0003] B. Description of the Prior Art
[0004] Golf putter is used for short strokes of a ball into a hall
cup to complete a hole. This precision instrument of golf club
generally consists of a grip, a shaft and a head. The head of the
putter is normally designed to have a perpendicular clubface to the
playing ground without a significant loft to give the ball a
special trajectory.
[0005] There are correct methods of using the putter with calm
wrists and arms, which in unity should make a pendulum motion
sideways resulting in the ball rolling over a distance determined
by the gripping force of the hands and the extent of a back swing.
Specifically for short putting, wrist or fingers should not be
involved in controlling forces to the ball to get the best result.
With the well known basics of putting in mind golfers practice for
lengthy period of time to attain their personal way of putting.
[0006] The immediate solution to the long-term practice could be to
have a putter custom made in the first place to the golfer's
individual specification including the right weight, a specially
placed center of gravity, and the degree of bounce using the right
face material of the head among other factors. Because of the
expertise and thus time and cost, which only some golf enthusiasts
want to bear there have been increasing efforts to incorporate the
customizing factors into the mass-produced putters. Moreover, as
the golfer improves in the performance level the putter may need
future readjustments that can be done preferably without special
skills or instruments.
[0007] Many mass-produced putter designs attempt to mimic custom
putters by leaving one or two components to the users' discretions:
an adjustable overall weight, a specially displaced center of
gravity with the use of heel and toe inserts; the degree of bounce
provided by a changeable face material of the head; club loft and
lie, etc.
[0008] U.S. Pat. No. 1,167,387 to Daniel discloses a driving golf
club with a cylindrical metal weight or disk-shaped weights fit in
a socket housed in a club recess. By positioning the interior heavy
disks with the use of light dummy disks in between, the balance of
the club head is varied. For a putter application, the weight
recess is provided parallel to the face of the head to conform to
the narrowness of the putter.
[0009] U.S. Pat. No. 2,155,830 to Howard discloses a golf club
having a universally adjustable joint between head and stem for
right or left handed use of the club and slidably adjustable
balance bodies positioned in a track extending in parallel with the
face of the club head.
[0010] U.S. Pat. No. 5,244,210 to Au discloses a golf putter system
with a head, which has an elongated threaded weight chamber
extending from toe to heel. The chamber contains a number of coins,
thrust/friction washers and some resilient spacers. Threaded end
plugs are rotated to move the weight distribution and the center of
gravity or sweet spot of the club.
[0011] U.S. Pat. No. 6,749,523 to Forzano shows a putter having at
least one adjustable weight which can be positioned longitudinally
along the putter head. A vibration dampening plate is used to
provide the golfer with a good feel upon striking the ball.
[0012] U.S. Pat. No. 7,018,304 to Bradford suggests a T-shaped
putter head having a toe wing and a heel wing to which selected two
of various weight members are threadedly attached respectively in
order to compensate undesirable moments from a golf ball struck off
center.
[0013] As the above patents indicate, known putters are still short
of providing a comprehensive range of customizing with putter
weight adjustments, loft adjustments, and/or bounce adjustments in
an easy structure to make and use intuitively.
[0014] Therefore, the primary object of the present invention is to
provide a practical golf putter structure that permits nearly all
known aspects of putter adjustments with an easy interface for the
golfer to intuitively find the best customized golf club for each
individual.
[0015] Another object of the present invention is to provide the
above putter with a strong structural integrity throughout various
adjustable components, which are not only functional to play with
but also esthetical to carry in the field.
SUMMARY OF THE INVENTION
[0016] A golf putter according to the present invention comprises
latitudinally elongated head having a generally rectangular hitting
face against a golf ball. The head has an integral center plate
extending longitudinally and rearward from the hitting face at its
bottom. The center plate has a visible centerline for aiming at the
ball. A ball joint for angularly fixing a shaft to the head
includes a frictional sphere attached to the bottom end of the
shaft. A semi-spherical recess is formed in the middle of the head
facing away from the hitting face less a semi-circular top opening
for allowing angular adjustment of the shaft.
[0017] A clamp member having a complementary semi-spherical recess
with a semi-circular top opening is screw fastened centrally to the
semi-spherical recess of the head, whereby the shaft is locked in a
truncated spherical socket at an adjusted angle to the head.
[0018] Two swappable posts extend from the opposite side of the
hitting face of the head near its latitudinal edges, each post
having a centrally threaded bore and being threadedly attached to
the head so that it may be replaced by a body of varying weight for
plugging a void created by the threading of the post. Two sets of
longitudinal stacks of weight elements having incremental thickness
are screw fastened to the head selectively through the threaded
bore of the posts respectively to provide a first mode of expanded
weight distribution or through the clamp member to provide a second
mode of compacted weight positioning in a conventional putter head
contour. The weight elements may be selectively added or deleted to
adjust the weight of the putter locally in a plane parallel to the
center plate and at least one elastic washer is inserted between
adjacent ones of the weight elements in each set concentrically
thereto to provide a bounce to the putter.
[0019] Alternatively, the posts may be integrally formed with the
putter head to bear the adjustable stacks of weight at a certain
distance from each other.
[0020] Acute edges are formed along the boundaries of the
semi-spherical recesses and semi-circular top openings of both the
head and clamp member to bite the frictional sphere of the shaft in
the ball joint locally to enhance the clamping speed as well as
clamping force.
[0021] The weight element sets in the compact mode cooperate to
visualize an aiming body in volume to assist the aiming centerline
of the center plate for the golfer to hit the ball
consistently.
[0022] The copper stabilization weights are stackable and removable
to adjust overall putter head weight and head balance as well as
being able to adjust impact feel from firm to soft using a simple
tool of a hex driver. With its adjustable geometry, weight,
balance, and feel, the present putter allows the golfer to make
adjustment to suit personal preferences. The putter is so adaptable
that it complements the golfer's own natural way of stroke instead
of compromising each unique stroke to fit otherwise less adaptable
putters.
[0023] The putter may be instantly customized for various aspects
of the putter specifications.
[0024] Then, the present putter may be used as a reference model to
which the golfer's any other putters matched in the personal
tune.
[0025] The putter has a higher moment of inertia (MOI) than most
existing putter available to provide an extreme stability and a big
and forgiving sweet spot.
[0026] Embodiments of the invention will now be described by way of
example with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 is a perspective view of a putter according to a
first embodiment of the present invention.
[0028] FIG. 2 is an exploded perspective view of the putter of FIG.
1.
[0029] FIG. 3 is a cross sectional view taken along line 3-3 in
FIG. 2.
[0030] FIG. 4 is a partially assembled rear view of the putter of
FIG. 1.
[0031] FIG. 5 is a top view of the putter of FIG. 1.
[0032] FIG. 6A is a perspective view of an alternative composite
weight ring according to the present invention.
[0033] FIG. 6B is a front view of the composite weight ring of FIG.
6A.
[0034] FIG. 7 is a partially assembled perspective view of a putter
according to a second embodiment of the present invention.
[0035] FIG. 8 is an exploded perspective view of the putter of FIG.
7.
[0036] FIG. 9 is a perspective view of the putter of FIG. 7 in
operation.
[0037] FIG. 10 is a cross sectional view taken along line 10-10 in
FIG. 9.
[0038] Similar reference numbers denote corresponding features
throughout the attached drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0039] With reference to FIG. 1, a putter 10 according to a first
embodiment of the present invention generally has a head 11 and a
shaft 12 connected to the putter head 11 through a ball joint 13.
The putter head 11 is a solid metal block having a generally
rectangular flat face 14 to hit the ball.
[0040] Extending rearwards of the head 11 are two threaded posts 15
formed integral to the head 11 at opposite ends thereof. Each post
15 supports a stack of stability weights 16, which are varying
thickness of heavy bored discs threaded together by socket head
screws 17 to the post 15. At least one elastic washer 18 is
removably threaded within the weight stack 16 to each post 15 to
provide a cushioning effect to the hit ball resulting in an
adjusted rebound characteristics of the putter 10 and its feel as
well as the overall weight and balance.
[0041] Because of the ball joint 13 of the shaft 12, the putter 10
is adaptable to both left and right-handed addressing. Between the
balance posts 15 a rectangular center plate 19 projects from a rear
bottom edge of the head 11. The center plate 19 provides a
directional contour to the putter 10 to aid in the desired putting
action as well as a deeper or backward center of gravity.
[0042] Above the top surface of the center plate 19 a clamp 20 is
screw fastened to the rear of the head 11 to hold the shaft 12. On
the top surface of the putter 10 a central aiming line 21 is marked
through the head 11, clamp 20 and center plate 19 in an exact
alignment with the ball joint 13 so that the golfer may have
consistent sense of view and feel of the ball impact spot in the
putter 10.
[0043] Referring to FIGS. 2 and 3, the detail of the putter 10 of
the present invention follows.
[0044] The weight set 16 is shown to have three incremental
thicknesses of one to three times. They may be formed of copper to
provide weight and resist rusting at the same time. At the golfer's
discretion, more or less weight discs may be assembled to the
putter 10 using the straight forward fastening means of screw 17.
Moving the elastic washer 18 to front or back in the weight set 16
also adjusts the center of gravity of the putter 10.
[0045] The putter head 11 also includes at its middle area a recess
22, which has approximately a semi-spherical interior with a
semi-circular top opening 23 while the shaft 12 has a rigid bulb 24
fixed to the bottom thereof. The recess 22 is sized to accept the
bulb tip 24 of the shaft 12 partly as the main portion of the shaft
12 extends through the top opening 23.
[0046] The clamp 20 is made of an elongated metal block and
provides the other halves of the recess 22 and top opening 23 as
shown at 22a and 23a in FIG. 3. Thus, when the clamp 20 is aligned
centrally of the head 11 facing the recess 22, a truncated
spherical interior is formed where the shaft bulb 24 may be tightly
positioned. For a swift fastening, the clamp 20 has two through
holes 25 at its opposite sides. Each hole 25 has smooth interior
surfaces and is shaped to receive a hex screw 26 snugly and
entirely. At the corresponding locations in the head 11 there are
formed two threaded blind holes 27 where a couple of the hex screws
26 passing through the holes 25 may be threaded to make a tight
engagement between the head 11 and clamp 20 enclosing the shaft
bulb 24 in order to lock the shaft 12 in an adjusted one of
virtually any angles about the head 11. In order to provide a near
permanent fastening of the shaft 12, the bulb 24 has a finely
roughened surface through sand blasting or chemical treatment.
[0047] The clamp region has a recess that is preferably a generally
cylindrical recess 22 in the spherical profile. The generally
cylindrical recess in the striking face cooperates with the
generally cylindrical recess in the clamp 20 member to form a
double ring clamp where the sphere 24 is engaged against a pair of
opposing rings. The opposing generally cylindrical recesses have
circumferential lips that act as rings. The double ring clamp
configuration is the preferred embodiment where the contact between
the lip of the cylindrical recess and the spherical member forms a
ring shaped pressure distribution on the surface of the spherical
member.
[0048] Facing rearwards of the clamp 20 is a round window 28 though
which a part of the bulb 24 of the shaft 12 is visible from the
outside. As shown in cross section in FIG. 3, inner edge 29 of the
window 28 protrudes into the recess 22 at the side of the clamp 20.
The similar acute edge 29 is formed at the recess 22 of the head
11. This acute edges 29 bite into the bulb 24 circularly to
contribute to the positive locking engagement between the shaft 12
and head 11.
[0049] Therefore, even a slight tightening of the screws 26 holds
the shaft 12 in a preliminary adjusted position in the ball joint
13 until the shaft 12 is completely locked in position by turning
the screws 26 to the end where the heads of the screws 26 lie flush
with the outer surface of the clamp 20. In this way, the user may
lock in the desired lie and loft of the putter 10 in a short
duration of trial and error with a ball to play any time the golfer
needs a tuning of such parameters due to different green speeds or
other reasons. Using the simple ball joint 13, turning the head
face 14 about makes it easy to reconfigure the putter 10 into a
left or right-handed player's instrument.
[0050] FIGS. 4 and 5 together show more technical views of the
putter 10, which has a flat top surface 30 and generally chamfered
bottom 31. The center plate 19 conforms to the bottom 31 and has
chamfered side edges. The latitudinal positional relations among
the head 11, center plate 19 and back weights 16 are more evident
in FIG. 4.
[0051] FIGS. 6A and 6B show an alternative weight disc 33, which is
composite so that it has an eccentric radial weight about the post
screw 17. The disc 33 may comprise a bigger metal section 34 and a
smaller plastic section 35 that complements the metal section 34 to
form a complete disc. Two disc sections 34,35 may be heat bonded
together. Otherwise, the smaller plastic section 35 may be molded
to enclose the metal section 34 resulting in the equal weight
distribution in the disc 33.
[0052] The composite disc 33 may replace part or all of the disc
members in the weight set 16. When two or more of such discs 33 are
loaded on the posts 15, the golfer may turn each disc 33 about its
axis, i.e. respective screw 17 to change the center of gravity in
height also as an extra control to fine tune the weight arrangement
of the putter 10 in three dimensions.
[0053] FIGS. 7 and 8 illustrate a second embodiment of the present
invention wherein a putter 100 is similar in shape and function to
the putter 10 of the first embodiment except that it includes a
swappable post 105 to configure the whole putter 100 in
conventional design under traditional regulations governing normal
golf instruments while retaining the novel weighting scheme of the
present invention.
[0054] The post 105 may be fastened to a threaded bore 101 formed
at either rear lateral side of the head 110 in a training session
where the weight sets 16 located edgewise provide more pronounced
weight distribution in the putter 100 because the positions of the
posts 15 space the MOI of the putter head 11 at a maximum
distance.
[0055] In transformation, the putter 100 may be concentrated into a
traditional shape by replacing the posts 105 with the plugs 102 and
the post screws 17 with longer clamp screws 107 respectively so
that the weight sets 16 shift to the axes of the clamp holes 25, as
shown in FIG. 8.
[0056] The transformed putter 100a is shown in FIGS. 9 and 10 which
can be brought to an official tournament with the familiarity of
muscle memories gained on the same putter that was suited to the
practice purpose. Therefore, the advantage of the transformable
embodiment of the putter is to adapt one putter to more varieties
of environments.
[0057] In addition, the outer edges of two weight sets 16 of the
putter 100a extend in parallel within the diameter of a golf ball
200 which enhances ball aiming power of the central line 21 to a
three dimensional level. By this arrangement of the weight discs
the golfer will visually align the outer boundary lines 201 of the
ball 200 with the double tubular sections 16 of the putter 100a
while directing the central line 21 to an imaginary center line of
the ball 200. Combined with the quick fine-tuning of visual
weights, the putter of the present invention results in more
desirable hits with less unexpected rolls of balls.
[0058] Surface grooves on the hitting face 11 are optional and may
be implemented as shallow grooves that allow additional degree of
control over the striking face interaction with the ball. The
shallow grooves preferably travel as parallel lines across the face
of the striking face.
[0059] Therefore, while the presently preferred form of the golf
putter has been shown and described, and several modifications
thereof discussed, persons skilled in this art will readily
appreciate that various additional changes and modifications may be
made without departing from the spirit of the invention, as defined
and differentiated by the following claims.
Call Out List of Elements
[0060] 10: Putter [0061] 11: Head [0062] 12: Shaft [0063] 13: Ball
Joint [0064] 14: Flat Face [0065] 15: Post [0066] 16: Weight [0067]
17: Post Screw [0068] 18: Elastic Washer [0069] 19: Center Plate
[0070] 20: Clamp [0071] 21: Central Aiming Line [0072] 22: Recess
[0073] 23: Opening [0074] 24: Bulb [0075] 25: Through Hole [0076]
26: Hex Screw [0077] 27: Blind Hole [0078] 28: Window [0079] 29:
Acute Edge [0080] 30: Top Surface [0081] 31: Chamfered Bottom
[0082] 33: Disc [0083] 34,35: Disc Sections [0084] 100: Putter
[0085] 101: Threaded Bore [0086] 102: Plugs [0087] 105: Swappable
Post [0088] 107: Clamp Screw [0089] 110: Head [0090] 200: Golf
Ball
* * * * *