U.S. patent application number 09/860458 was filed with the patent office on 2002-11-21 for golf putter.
Invention is credited to Sindelar, Joseph L..
Application Number | 20020173377 09/860458 |
Document ID | / |
Family ID | 25333272 |
Filed Date | 2002-11-21 |
United States Patent
Application |
20020173377 |
Kind Code |
A1 |
Sindelar, Joseph L. |
November 21, 2002 |
Golf putter
Abstract
A putter type golf club head having a putter head with an
overall weight between 375-600 grams and a short shaft attached to
the putter head having an overall length between 20-33 inches.
Inventors: |
Sindelar, Joseph L.;
(Horseheads, NY) |
Correspondence
Address: |
Howard N. Flaxman
WELSH & FLAXMAN, LLC
Suite 112
2341 Jefferson Davis Hwy.
Arlington
VA
22203
US
|
Family ID: |
25333272 |
Appl. No.: |
09/860458 |
Filed: |
May 21, 2001 |
Current U.S.
Class: |
473/340 |
Current CPC
Class: |
A63B 2208/12 20130101;
A63B 53/0487 20130101; A63B 53/007 20130101; A63B 53/0408
20200801 |
Class at
Publication: |
473/340 |
International
Class: |
A63B 053/04 |
Claims
1. A putter type golf club, comprising: a putter head secured to a
lower end of a shaft, the shaft including a grip at the upper end
thereof; wherein the putter head has an overall weight in the range
of approximately 375 to 600 grams and the shaft has an overall
length between approximately 20 and 33 inches.
2. The putter type golf club according to claim 1, wherein the
shaft has an overall length of approximately 31 inches.
3. The putter type golf club according to claim 1, wherein the
putter head has an overall weight of approximately 425 grams.
4. A method of forming a putter type golf club, comprising the
following steps: (a) selecting a golf shaft having an overall
length in the range of approximately 20 to 33 inches; (b) forming a
putter type golf club head with an overall club head weight within
the range of approximately 375 to 600 grams; and (c) attaching the
club head to the shaft.
5. The method according to claim 1, wherein the shaft has an
overall length of approximately 31 inches.
6. The method according to claim 1, wherein the putter head has an
overall weight of approximately 425 grams.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to golf putters. More
particularly, the invention relates to a golf putter having a heavy
head in conjunction with a short shaft.
[0003] 2. Discussion of the Prior Art
[0004] The main factors that must be considered for putting success
include properly reading the slope of the green, aligning the
putter to the intended aim line, maintaining the path of the club
head during the execution of a putting stroke, positioning the face
angle of the striking face at impact, striking the ball on the ball
striking face relative to the exact center of percussion and
controlling the force applied to the golf ball as it is struck to
control the speed of the ball as it rolls toward the hole. The
condition of the putting surface and the effect of the elements,
such as wind or rain, also have a substantial effect upon putting
success, although a golfer has less control over these latter
conditions.
[0005] An important factor for controlling the position, speed and
direction of a putter head resides in the feel that a golfer
experiences while putting. One way of measuring this feel is by
calculating swing weight of a particular golf club. Swing weight is
measured on a mechanical scale and is determined by the moment of
force created as a result of the length of the shaft and the weight
of the club head. Shortening the length of the shaft lowers the
swing weight, making the club feel much lighter. Thus, a short
shaft with a conventional weighted club head will feel extremely
light and consequently is more difficult to control.
[0006] Conventional golf putters are made with shafts whose lengths
are between approximately 34 and 36 inches (or much greater for
commonly used long putters) and with heads weighing between
approximately 290 and 320 grams. Some elongated putters have shafts
which extend up to 60 inches in length. It is also known to provide
golf putters having shorter length shafts, for example, those used
by children and favored by many touring professionals. Other
examples of golf clubs using relatively short shafts are shown in
U.S. Pat. No. 3,462,155, to Pelz, and U.S. Pat. No. 3,378,881, to
Thompson. There is no suggestion in either of these patents for
altering the weight of the club head.
[0007] Prior art putters also recognize the desirability of
providing a structure for adjusting the overall weight of a putter
head by the addition or subtraction of removable masses. Examples
of such putters are found in U.S. Pat. Nos. 5,253,869, to Dingle et
al., and U.S. Pat. No. 5,571,053, to Lane. There is no suggestion
in these patents for altering the length of the shaft to maintain
the feel of a conventional putter as the weight is changed.
[0008] However, those skilled in the art are consistently looking
for putter designs which will help golfers improve upon their
putting stroke. The present putter offers a combination of weight
and length to help improve a golfer's ability to feel and control
the putter, thereby raising his or her performance level.
SUMMARY OF THE INVENTION
[0009] It is, therefore, an object of the present invention to
provide a golf putter including a putter head secured to a lower
end of a shaft. The shaft includes a grip at the upper end thereof.
The putter head has an overall weight in the range of approximately
375 to 600 grams and the shaft has an overall length between
approximately 20 and 33 inches.
[0010] It is also an object of the present invention to provide a
golf putter wherein said shaft has an overall length of
approximately 31 inches.
[0011] It is a further object of the present invention to provide a
golf putter wherein the putter head has an overall weight of
approximately 425 grams.
[0012] It is another object of the present invention to provide a
method of forming a putter type golf club. The method is achieved
by selecting a golf shaft having an overall length in the range of
approximately 20 to 33 inches, forming a putter type golf club head
with an overall club head weight within the range of approximately
375 to 600 grams and attaching said club head to said shaft.
[0013] Other objects, advantages and salient features of the
invention will become apparent from the following detailed
description, which, taken in conjunction with the annexed drawings,
discloses a preferred, but non-limiting, embodiment of the subject
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is a perspective view of a golf putter in accordance
with the present invention.
[0015] FIG. 2 is a side elevation view of the putter of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] The detailed embodiments of the present invention are
disclosed herein. It should be understood, however, that the
disclosed embodiments are merely exemplary of the invention, which
may be embodied in various forms. Therefore, the details disclosed
herein are not to be interpreted as limited, but merely as the
basis for the claims and as a basis for teaching one skilled in the
art how to make and/or use the invention.
[0017] Physics and geometry dictate that the shorter the golf
shaft, the greater control the golfer has over the motion imparted
to the putter head, at least in part because the golfer's hands are
closer to the club head. Furthermore, a heavier club head provides
greater club head stability, making it easier for the golfer to
control the position, speed and direction of the putter head as the
putting stroke is executed. The present invention takes advantage
of these two concepts and, with reference to FIGS. 1 and 2,
provides a golf putter 10 having a putter head 12 with
substantially increased weight in combination with a relatively
short shaft 14. The overall putter head 12 weight is preferably
within the range of approximately 375 to 600 grams. The overall
length of the shaft 14 is between approximately 20 inches and 33
inches.
[0018] The combination of a weighted putter head 12 and short shaft
14 provides advantages not recognized by the prior art. This
structure provides a putter type golf club 10 with all the
advantages of a shorter shaft with respect to being able to more
easily control the putter head, while maintaining the same or
similar feel aspects of conventional putters with longer shafts.
The short shaft 14 allows the golfer's arms to extend downwardly in
a full vertical position, this being recognized as the most
efficient position. The short shaft also allows the golfer to
extend his or her arms downwardly in line with the putter grip 16
and in a position closer to the ball when addressing a golf ball
prior to executing a putting stroke. This closer positioning is
achieved without requiring the user to alter his or her customary
bend at the hips. Although the putter head 12 is substantially
heavier than conventional putter heads, the putter 10 is not
appreciably more difficult to move when executing a putting stroke.
However, the slight increase in effort required to move the heavier
head is translated into greater feel for improved distance control.
Improved control is also enhanced by the short shaft 14, which
positions the user's hands closer to the mass of the putter head
12. Once the putter 10 starts its movement, motion stability is
achieved as a result of the increased weight of the putter head 12,
causing the putter 10 to tend to stay in the direction of initial
motion due to the laws of inertial physics.
[0019] As mentioned above, the shaft 14 ranges in length from
approximately 20 to 33 inches. This length is substantially shorter
than a conventional putter type golf club which is normally
approximately 34 to 36 inches long. Preferably, the shaft 14 of the
present invention is 28 to 32 inches, the exact length depending
upon the distance from a golfer's hands to the ground when in his
or her address position.
[0020] The mass of the putter head 12 is preferably in the range of
approximately 375 to 600 grams, it being understood that the mass
of a conventional weighted putter head is in a range of 290 to 320
grams. It will be appreciated that the overall weight of the putter
head 12 may be achieved by using a thicker head design, a more
dense material and/or various weights or inserts. In addition, any
combination of the above weighting techniques may be employed. It
is also contemplated that other weighting techniques may be
employed without departing from the spirit of the present
invention. For example, the putter head may be made of conventional
steel with a head design thicker than conventional heads to bring
it up to the desired weight or the head may be weighted with
suitable inserts, such as, lead and/or tungsten or other heavier
metal, to achieve the weight.
[0021] In use, a golfer should typically bend slightly from the
hips and allow his arms to drop vertically to a fully extended
position. At a location where the hands naturally fall, the
golfer's hands engage the handle or putter grip 16, which may be
separately attached as is commonly done in the manufacture of
conventional putters. When using a putter of conventional length
(34 to 36 inches), the golfer's arms are bent considerably at the
elbows, thus giving room for flexibility and error during the
putting stroke. It will be appreciated that the overall height of
the golfer, his arm length and the overall amount of bend at the
hips, combine to determine exactly how long the shaft 14 must be in
order for a natural conjunction of the hands and the putter grip to
occur.
[0022] It is contemplated that a preferred embodiment of a golf
putter 10 fitted for a typical 6 foot golfer would use a shaft
length of 31 inches. Shorter players will use putters with shorter
shafts, whereas taller players will use putters with slightly
longer shafts.
[0023] A similar feel, defined as swing weight, is obtained with
the shorter shaft putter of the present invention when compared
with a conventional longer putter due to the combination of a short
shaft 14 and weighted head 12. It will be appreciated that the
swing weight of a golf putter is reduced approximately six points
per inch as the shaft is shortened. Therefore, it can be readily
calculated that a swing weight for the golf putter 10 of the
present invention can be comparable to a conventional length shaft
putter by adding weight to the club head as it is shortened.
[0024] With the putter head 12 of the present invention, it has
been found that a head weight of approximately 425 grams combined
with a 31 inch shaft is ideal for maintaining stability of motion
as the putter 10 is swung during the execution of a putting stroke.
The increased club head weight, while providing additional mass,
does not create a substantially different inertia because of the
shorter shaft 14. Therefore, the same approximate swing weight
feel, as with a conventional putter, is maintained during the
execution of a putting stroke.
[0025] However, once the putter head 12 is in motion, the increased
weight creates a stability of motion whereby it is more difficult
for the golfer to create an uneven or erratic motion which might
divert the putter head from its initial intended aim line during
the execution of the putting stroke. The increased mass also exerts
a greater impact on a golf ball for a given club head speed,
therefore, causing the ball to roll further. Club head speed
determines ball speed. Understand, however, it also requires a
slight increase in effort to attain a given club head speed. The
increased mass also expands the effective hitting area, or sweet
spot, thereby making the putter more forgiving on the miss hits.
And, its greater mass, along with the associated increased effort,
create a feel that makes it easier to roll a golf ball to a
preselected distance.
[0026] While various preferred embodiments have been shown and
described, it will be understood that there is no intent to limit
the invention by such disclosure, but rather, is intended to cover
all modifications and alternate constructions falling within the
spirit and scope of the invention as defined in the appended
claims.
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