U.S. patent application number 09/864316 was filed with the patent office on 2002-10-17 for golf putter.
This patent application is currently assigned to DOUROSHIZAI CO., LTD.. Invention is credited to Imamura, Masazumi.
Application Number | 20020151374 09/864316 |
Document ID | / |
Family ID | 18968367 |
Filed Date | 2002-10-17 |
United States Patent
Application |
20020151374 |
Kind Code |
A1 |
Imamura, Masazumi |
October 17, 2002 |
Golf putter
Abstract
The purpose of this invention is to provide a golf putter with
which players are capable of making accurate putts. It is quite
difficult to make precision putting strokes as far as the strokes
are guided by the spot mark on the putter head. There have been
proposals on various training tools and improved putters, but it is
still not easy to learn the skill of accurate putting. The inventor
has developed a golf putter 20 provided with projected end portions
21 and 21', which are disposed at both ends of the putter head la
in a one-piece construction and stick out in the forward direction
for a certain distance at right angles to the putt face F. It has
been confirmed that with the putter of this invention, any player
can easily make accurate putting strokes.
Inventors: |
Imamura, Masazumi; (Sapporo
City, JP) |
Correspondence
Address: |
OLIFF & BERRIDGE, PLC
P.O. BOX 19928
ALEXANDRIA
VA
22320
US
|
Assignee: |
DOUROSHIZAI CO., LTD.
Rm. 802, 1-8, Nishi-ku
Sapporo City
JP
|
Family ID: |
18968367 |
Appl. No.: |
09/864316 |
Filed: |
May 25, 2001 |
Current U.S.
Class: |
473/236 |
Current CPC
Class: |
A63B 53/0433 20200801;
A63B 53/0416 20200801; A63B 53/0441 20200801; A63B 53/0487
20130101 |
Class at
Publication: |
473/236 |
International
Class: |
A63B 069/36 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 17, 2001 |
JP |
2001-117901 |
Claims
What is claimed is:
1. A golf putter characterized in that putter head is provided with
projected end portions at both ends of said putter head in a
one-piece construction and that said end portions are designed to
stick out for a certain distance in the forward direction at right
angles to the putter face.
Description
TECHNICAL FIELD
[0001] This invention relates to a golf putter and more
particularly to a golf putter from which accurate putting can be
expected
BACKGROUND OF THE INVENTION
[0002] Golf putting is played on the green by setting up the putter
head in the rear of the ball and hit the ball with the putter head
to roll the ball into the hole. As important points of a good
putting stroke, the putter head should be initially placed at a
position perpendicular to the target line along which the ball is
putted. Then, the putter head should be set so that the sweet spot
(the center of balance) of the putter head is precisely aligned
with the central position of the ball. Under this condition, the
player should first take the putter head straight back along the
target line while keeping their eyes over the ball and keeping head
and shoulders still, and then take the putter head forward to putt
the ball along the target line and roll the ball into the hole.
When a series of movements are conducted correctly and smoothly, a
precision putting stroke is completed, and the ball can be brought
toward the hole along the target line.
[0003] To execute this, the players must at first consider the
undulations of the green surface, read the green for grain, and
draw an imaginary target line 3, such as shown in FIG. 4, so that
the ball 2 will roll along this line and into the hole when the
ball 2 is putted with the putter 1. Then, the players need to make
an accurate stroke to roll the ball toward the first target point.
In practice, the line connecting the toes of both feet should be
parallel to the imaginary line 3. It is important to putt the ball
2 on the line 3 while the face F of the putter head 1a is kept
square, i.e., at the position perpendicular to the line 3. This can
be done by giving the ball 2 an impact of putt at right angles from
the sweet spot 1b (which will differ in position, depending on the
head structure) near the center of the putter face F.
[0004] In FIG. 4, S represents the shaft.
[0005] Various proposals have been made for the learning of
above-described accurate putting strokes.
[0006] As an example, Official gazette of Japanese utility model
laid open No. 1987-155875 proposed a putter for use in golf
training, such as shown in FIGS. 5a and 5b. The head 5 of this
putter comprises a V-shaped face F1 on one side, a convex face F2
on the other side, and a bottom face 6 between the V slopes, with
the bottom width being narrower than the diameter of the ball 2.
The shaft S is fitted detachably to the head 5.
[0007] This putter is aimed at giving the ball 2 always an
automatic roll into the central portion even when the ball 2 cannot
be putted with the central portion of the head, but instead putted
with one of the slopes 7, as shown in FIG. 5a. This putter is said
to be quite effective in making judgments as to whether the line
connecting the toes of both feet is parallel to the expected target
line, or whether the way to use both hands is good, based on the
difference between the actual ball line and the previously expected
target line.
[0008] The bottom face 6 (the central zone) of the V-shaped face Fl
is given a narrower width than the diameter of the ball 2. If the
ball 2 is putted with a slope 7 of the face Fl, the ball is given
unnecessary rotation. But by the time the ball reaches the bottom
face 6, the ball loses its rotation because the opposite slope
works to reduce the rotation. This putter is thus advantageous in
that the ball 2 rolls straight forward whenever it is putted at any
point of the face F1. On the other hand, the convex face F2 has a
semi-circular surface in its cross-section, as shown in FIG. 5b. If
this face is used for putting, the ball never rolls toward the hole
unless the ball is seized at the central point (a) of the face. If
the ball were seized at a point (b) or (c) on the surface, the ball
would roll on in the direction of 2a or 2b, which is quite
different from the direction of the expected target line. Since the
putt from this face F2 makes it possible to judge the right
position of putt, it is asserted that the putter of this type is
very effective for the experienced golfers to train themselves.
[0009] Official gazette of Japanese utility model laid open No.
1995-3684 proposed a putt training tool of the disposable,
ball-guiding type, which can be fitted detachably to the putter
head, as shown in FIG. 6. This tool can be fitted to the putter by
utilizing the spot mark 8, placing first a positioning aid onto the
putt face of the putter so that the guide plates 9 and 9' can be
positioned at right places relative to the spot mark 8, then
setting the guide plates 9 and 9' on both sides of this positioning
aid, adhering these plates to the putt face of the putter, and
removing the positioning aid from the putt face. As a result, the
putt face is provided with a ball-guiding putt zone 10 having
partition walls on both sides and having a width slightly wider
than the ball diameter.
[0010] If the ball is seized with the putter head at its central
position, i.e., the position on the line extending from the spot
mark 8, then the ball is led into the ball-guiding putt zone and is
putted with the head at its central position (or sweet spot).
[0011] In that case, the ball rolls on straight in the right
direction intended by the player.
[0012] If, on the other hand, the ball is seized at a head position
other than the spot mark position, then the ball will come in touch
with the inside wall of a guide plate, or hit against the tip of a
guide plate or against the end portion of the head. In that case,
the ball will roll obliquely or in other directions not intended by
the player. Sometimes, such a play may be a cause of danger.
[0013] When players train themselves using a putter equipped with
this tool, they learn the position of the sweet spot on the putter
head or master the skill of putting through practices.
[0014] Official gazette of Japanese patent application laid open
No. 1996-126729 proposed a putt training guide plate, such as shown
in FIGS. 7 and 8. In FIG. 7, right- and left-side vertical faces 11
and 11' are separated from each other at a certain space by an open
face 12 and are connected by a connecting portion 13, which is bent
backward and laid on the top surface of the putter head and is
provided with a central projection 14. The right- and left-side
vertical faces 11 and 11' are provided with gateposts 15 and 15',
respectively, each having upper and lower projections. An adhesive
is applied on the back surface of the guide plate 16 and is
protected with release paper. At the time of training, this release
paper is peeled off, and the guide plate is adhered to the putter
face F.
[0015] As shown in FIG. 8a, the ball 2 is best putted at the
central position P in the open face 12 of the guide plate 16, i.e.,
the position right below the spot mark 8. When putting the ball 2
in practice, the player must maintain the putter at right angles to
the direction in which the ball 2 rolls on.
[0016] Thus, when the ball is putted accurately at the central
position P of the putter 1, the ball goes straight in the direction
perpendicular to the putt face and reaches the point A. This
direction verifies that the player has made a fine putting
stroke.
[0017] If, however, the ball is seized at a wrong position outside
the central position P, and comes in contact with a gatepost 15 or
15', then the ball will head for the point B or C. In that case,
the player instantly becomes aware of an inaccurate putting stroke.
If the player fails to keep the putt angle of 90.degree. to the
intended ball direction, as shown in FIG. 8b, then the ball comes
in contact with a gatepost in a similar way. This also makes a
wrong putting stroke known instantly to the player. Therefore, it
is asserted that the best putting practice is possible with this
guide plate.
[0018] Meanwhile, there have been other proposals with emphasis on
additional components, with which the putter head is provided, to
guide the ball along the line 3, without depending on the spot mark
8.
[0019] Official gazette of Japanese patent application laid open
No. 1984-194764 proposed a putter provided with a guide rod 17 in
the rear of the putter head 1, as shown in FIG. 9. The rod 17 is
fitted in a T-shape, as seen from above, at the right angles to the
rear face. If this rod 17 is aligned straight with the hole 4, the
head 1 is always perpendicular to the line 3, and the ball 2 is
positioned on the line connecting the target and the guide rod 17.
When the ball is putted at this position, a right putting stroke
can be expected.
[0020] Official gazette of Japanese patent application laid open
No. 1994-205855 proposed a putter equipped with a semi-circular
extension 18, which is disposed horizontally on the rear side of
the face F of the putter head. An observation slit 19 is formed in
this extension 18 at a position corresponding to the sweet spot of
the putter head 1 in the direction perpendicular to the face F.
[0021] In conventional putters, a positioning mark (like the spot
mark 8) of a spot or a line is placed on top of the putter head.
When this mark is used as a fixed point, it is possible to make a
judgment on the direction in which to stroke the putter head or the
position of the sweet spot.
[0022] In using such a conventional putter, the player sets the
putter head in the rear of the ball, using the positioning mark as
the fixed point, and keeps eyes over the ball while putting the
ball with this putter.
[0023] However, when a positioning mark is put on the putter head,
players tend to move their eyes involuntarily with the movement of
the putter taken straight back when they should keep their eyes
steadily over the ball. As a result, they cannot keep their head
and shoulders still.
[0024] As described above, it is important for the player to
complete a putting stroke smoothly from beginning to end while
consistently keeping eyes over the ball and keeping shoulders
still. The conventional putters tend to cause wrong shots to occur
because it is difficult for the player to keep eyes and shoulders
still. However hard practice players repeat using such a
conventional putter, they would never have a good command of
accurate putting skill and cannot expect any progress in the
play.
[0025] In the case of the putters shown in FIG. 10a, the player in
the putting practice sets up the putter head in the rear of the
ball, visualize a target line along which the ball is putted, align
the observation slit with this imaginary line, and put a mark on
the area of carpet in the observation slit. Under this condition,
the player makes a putt while keeping eyes on the mark, and takes
the putter through the ball in such a way that the observation slit
will pass over the mark.
[0026] In this case, the mark is not drawn on the putter head, but
is placed under the head. Therefore, players are no longer lured to
move their eyes and shoulders involuntarily with the movement of
the putter taken straight back. Thus, allegedly, a correct putting
is achieved, and the ball can be directed toward the hole along the
target line.
[0027] This patent application asserted that through repeated
putting practice with this putter, the players would quickly
acquire an ideal swing form of putting and therefore that they
could have an expectation for early and steady learning of the
putting skill.
[0028] The observation slit in FIG. 10a is a cut in the extension.
But as shown in FIG. 10b, the slit can be a hole 19 punched in the
extension 18 in the direction perpendicular to the putter head. As
shown in FIG. 10c, the extension 18 is not limited to the
semi-circular shape, but can be rectangular, with the observation
slit being cut through the extension so as to divide the extension
nearly in two.
DISCLOSURE OF THE INVENTION
[0029] The above proposals have the disadvantages described
below.
[0030] In the putters shown in FIGS. 5-8, emphasis is placed much
strictly on an attempt to putt the ball on the line of spot mark
while keeping the putt face at the angle of 90.degree. to the line.
Because of this intention, the gates (e.g., bottom face F1, guide
plates 9 and 9', and gateposts 15 and 15'), through which the ball
is admitted and putted, were set at too narrow a width. Such a
precision as these is not required in actual putting.
[0031] The putter of FIG. 5 is used only for training, and its
shape is different from the shape of an ordinary putter shown in
FIG. 4. Therefore, players have to recheck on their sense of
balance for the head each time when they make a put in a game. For
this reason, hard practice is unlikely to produce satisfactory
results.
[0032] The tools shown in FIGS. 6-8 are the attachments to the
putters that are used in actual games. Despite the lightweight of
these tools, some changes in the balance cannot be denied, and
require players to make adjustments.
[0033] In the end, there has been no training putter or tool that
enables the "feel" of the putt acquired in the training to be
applied to actual games without making any adjustment. (It has
justly been claimed that these putters or tools should be used for
training.) In addition, it is recommended that the setting of an
imaginary target line should be based on the spot mark on the
putter, regardless of whether the putter is for use in game or in
training. Since the spot mark is only a short line drawn across the
width of the top surface of the head, the target line, obtained
merely by extending this short line, is quite unreliable. In fact,
many players have experienced that these putters and tools have
fallen short of their expectations.
[0034] In common practice, the players try to putt the ball into
the hole in the green as they draw an imaginary extension line to
the hole 4, utilizing the spot mark drawn at the sweet spot 1b on
top of the putter head, as shown in FIG. 4. Since players have to
aim at the hole ahead of this thin line, they feel it difficult to
make an accurate putting stroke. Any accurate pendulum stroke is
impossible under the condition that only this spot mark is given
for the positioning. In many cases, there occur such mistakes as
pushed putts and pulled putts. With these putters, the players
often tend to make a putt in a looking up posture, thus failing to
keep the ball moving straight forward.
[0035] The above-described incomplete ball-guiding function is also
pointed out for the putters shown in FIG. 10.
[0036] The putters of FIGS. 9 and 10 have no perfect ball-guiding
function. Even if the guiding function works, the situation remains
unchanged, in which the ball is guided along a thin line, and no
precision is expected for the putting.
[0037] If a putter were to be given a sufficient ability to guide
the ball while changes in weight balance is minimized, then a
putter with an additional tool would have to be designed in a much
larger size than those proposed in the past, in order for a
straight line portion to be secured.
[0038] This invention has been made to solve the above-described
problems. The object of this invention is to provide a golf putter
that makes any training putter unnecessary and minimizes the
addition of any ball-guiding projection or ridge and the changes in
putter balance within a rational range, so that the player can set
up a right address position for the putting and make a true
pendulum putting stroke without causing any looking up, pushed putt
or pulled putt to occur.
[0039] The above object can be achieved by the putter of this
invention, which is provided with a projected end portion sticking
out for a certain length in the forward direction at right angles
from each end of the putt face.
[0040] The projected end portions are disposed at both ends of, and
at right angles to, the putt face. These portions function as a
guide for the player to become aware of the ball line just as the
spot mark functions in the similar manner. But unlike the spot mark
that can be only drawn across the width of the putter head, these
projected portions stick out for a distance longer than the head
thickness. Their length is surprisingly enough to make the player
recognize the imaginary parallel lines drawn on both sides of the
putter at a sufficient allowance.
[0041] In the past, the players could not help but aiming at the
hole only along a thin line. With this putter, they can aim at the
hole not along a thin line but within a broad straight guiding
zone. Because of the guiding action of this broad zone, players can
make a precise pendulum stroke while avoiding the looking up,
pushed putts or hooked putts. The reason why the pendulum strokes
become easy is that, as the projected guiding portions are located
at both ends of the putt face, the players have no other way but to
take the putter straight back, and the follow-through comes as the
natural reaction. As a result, they can make precise pendulum
strokes.
[0042] The projected end portions of this putter have a one-piece
construction. Since these end portions serve as the ball line
guides, players can address the ball precisely to aim it at the
hole.
[0043] As the most remarkable feature of the line guiding action
offered by the projected end portions, the putter of this invention
has quite a different way to take aim at the hole. When these ball
line guides are set at right angles to the hole, it is possible for
players to utilize the three lines including the central line
connecting between the spot mark and the hole. These three lines
are not mere lines but they form a ball-guiding zone. If the ball
is putted so as to remain in this zone, it is highly probable that
the ball rolls into the hole.
[0044] Due to the action of these ball line guides, the players can
address the ball at a posture sideways to the hole wherever in the
green they are.
BRIEF DESCRIPTION OF THE DRAWINGS
[0045] FIG. 1 is a plan view of the golf putter of this
invention.
[0046] FIG. 2 is a perspective view of the putt face of the putter
of this invention.
[0047] FIG. 3 is an explanatory diagram of the putter of this
invention.
[0048] FIG. 4 is an explanatory diagram showing the way to putt the
ball with the putter of this invention.
[0049] FIGS. 5a and 5b are explanatory diagrams showing the way to
putt the ball with a prior-art putter.
[0050] FIG. 6 is an explanatory diagram of a conventional training
putter.
[0051] FIG. 7 is an explanatory diagram of another conventional
training putter.
[0052] FIGS. 8a and 8b are explanatory diagrams for explaining the
directions in which the ball goes when it has been putted at wrong
places of the putter shown in FIG. 7.
[0053] FIG. 9 is an explanatory diagram of a conventional putter
provided with a guiding rod to help direct the ball at the
hole.
[0054] FIGS. 10a-10c show the conventional putters having
ball-guiding extensions in varied shapes.
A PREFERRED EMBODIMENT OF THE INVENTION
[0055] This invention is further described by referring to FIGS.
1-3.
[0056] The golf putter 20 of this invention comprises projected end
portions 21 and 21', which are provided at both ends of the putter
head 1a in a one-piece construction and stick out forward for a
certain distance at right angles to the putt face F.
[0057] The putter head 20 of this invention can be manufactured
with all the putter head materials now in commercially
available.
[0058] The projected end portions 21 and 21' are the extensions to
the head 1a. Naturally, they have a length extended more than the
head thickness. In the plan view, the bottom of the putter has a
staple-like shape, which makes it possible for the player to keep
the putter standing upright without falling. Thus, at the address
position, the putter placed in the rear of the ball automatically
determines the vertical position of the shaft S. The width of each
projected end portion, as seen from the front, can be simply enough
to have a breakage-resisting strength. Therefore, not so large a
width is required. The change in the balance between front and back
is only slight, and there is no change in the lateral balance
between the right and left of the putter.
[0059] There is little probability that the ball is putted with
these end portions of the putter. Unlike prior training putters,
the putter of this invention is not intended to improve the putting
skill by putting the ball with the added portions of the putter. In
this respect, the putter of this invention is basically different
in its use from the putters of FIGS. 5-8.
[0060] The looking up can be prevented by the function of the ball
line guides, which the projected end portions perform successfully
as described above. The players can no longer take a looking up
posture when they make a putt while avoiding the ball to come in
contact with a ball line guide. The players also have little
trouble avoiding pushed putts and pulled putts, and they can make
ideal pendulum strokes that have never been experienced before,
when they make putting strokes along these ball line guides.
[0061] The function of the ball line guides is as outlined in FIG.
3.
[0062] When the player takes an address position with the putter
head 1 set at right angles to the hole 4, an imaginary zone 23 is
formed by the line extended from the spot mark 8 and the ball
guiding lines 22 and 22', which extend from the projected end
portions 21 and 21'. At the address position, the player is
conscious of this broad zone extending to the hole 4, and with this
image in mind, the player can make an accurate putting stroke.
[0063] The golf putter of this invention comprising the
above-described configuration has the following effects:
[0064] (1) There is no large change in the structure and balance,
thus giving no sense of incongruity to players.
[0065] (2) The bottom of the putter is stabilized by the
staple-like structure, giving the players a sense of stability when
they address the ball.
[0066] (3) The ball is easier to putt than when putted with other
putters because the ball seems to be embraced in the putt face.
[0067] (4) The ball guiding function makes it possible for the
player to seize the ball right at its center.
[0068] (5) The zonal guide keeps the player so calm and confident
that a pendulum stroke is easy to make.
[0069] (6) The image of the zone is so strong that the players can
no longer take a looking up posture.
[0070] (7) The putter of this invention has quite a different
purpose of construction so that the ball has little chance of
coming in contact with the projected end portions.
[0071] (8) The zonal guiding function affords the players to set up
an easy address position toward the hole.
[0072] (9) The putter of this invention makes any training putter
unnecessary.
* * * * *