U.S. patent number 3,912,277 [Application Number 05/490,909] was granted by the patent office on 1975-10-14 for golf club.
Invention is credited to David Todd Pelz.
United States Patent |
3,912,277 |
Pelz |
October 14, 1975 |
Golf club
Abstract
A golf club including an attachment having alternate use
positions on the club head. In a first position, a pair of spaced
elements of the attachment defines a restricted area of the club
striking face whereon the user must strike the ball while
practicing. In the second use position, the normal striking face is
unobstructed for normal playing but the mass and weight of the
attachment is still present so that the player will continue to
experience the feel of the club to which he has become accustomed
in practicing.
Inventors: |
Pelz; David Todd (Beltsville,
MD) |
Family
ID: |
23950013 |
Appl.
No.: |
05/490,909 |
Filed: |
July 22, 1974 |
Current U.S.
Class: |
473/236 |
Current CPC
Class: |
A63B
69/3685 (20130101); A63B 53/007 (20130101); A63B
60/52 (20151001) |
Current International
Class: |
A63B
53/00 (20060101); A63B 069/36 (); A63B
053/06 () |
Field of
Search: |
;273/186,194,171,172,174,175,162,163,164,193 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Marlo; George J.
Attorney, Agent or Firm: Aquilino; Nicholas J.
Claims
What is claimed is:
1. A golf club selectively usable for practicing golf or for
playing the game of golf comprising in combination a club head
having a ball striking face and said striking face having a center
of percussion, a unitary attachment for the club head of
predetermined mass having two positions of use on the club head
relative to said ball striking face, said attachment including
spaced elements which in a first of said two positions of use
project forwardly of said ball striking face on opposite sides of
said center of percussion to thereby form a restricted practice
target area on said ball striking face, said unitary attachment in
the second of said two positions of use having said spaced elements
disposed away from said striking face so that the entire striking
face including the center of percussion is clear and without
irregularities and therefore adapted for regular play, the total
mass of said attachment and said club head remaining the same in
either of said two use positions of the attachment so that the user
of the club will experience the identical club feel when practicing
or playing golf, and interengaging coupling means on the club head
and attachment for securing the attachment to the club head in
either of said two use positions.
2. A golf club as defined in claim 1, wherein said club is of the
putter type and said unitary attachment comprises a bar-like body
portion, and said spaced elements are secured to opposite ends of
said body portion and project beyond at least one side thereof.
3. A golf club as defined in claim 2, and said club head having a
bottom face and said bottom face being recessed to receive said
unitary attachment in either of said two positions of use with the
attachment substantially flush with said bottom face.
4. A golf club as defined in claim 3, and the recess in the bottom
face of the club head including a longitudinal section receiving
said bar-like body portion and a pair of transverse sections
receiving said spaced elements, said transverse recess sections
extending through said ball striking face and the rear side of said
club head.
5. A golf club as defined in claim 3, and the recess in the bottom
face of the club head extending through said ball striking face
adjacent the bottom of the club head and having a pair of deep
recess portions inwardly of the ball striking face to receive said
spaced elements in one of said two use positions of the
attachment.
6. A golf club as defined in claim 2, and said spaced elements also
projecting beyond a second side of the bar-like body portion and
generally at right angles to the first-named projecting direction
of said elements.
7. A golf club as defined in claim 1, and said interengaging
coupling means including a recess in the bottom face of the club
head of a shape and size to receive said unitary attachment in
either of said two positions of use and with the attachment
substantially flush with said bottom face in both of said positions
of use.
8. A golf club as defined in claim 7, and screw-threaded fastener
means engageable with said club head and attachment and securing
the attachment releasably in said recess.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a golf club which can be used both
as a practice device and as a normal club in accordance with United
States Golf Association rules and particularly to a putter type
golf club.
There are a number of known golf putter clubs which include
integral or detachable projections on the face of a putter. For
example, the U.S. Pat. Nos. to Faini 3,039,776 and Delaceg
3,392,977 both show putters having projections at either end of the
putter blade to aid in alignment.
The patent to Polsky U.S. Pat. No. 3,021,141 discloses the use of a
detachable bumper arrangement whereby an off center hit of a golf
ball will cause a pronounced variance from the desired line of
travel.
The U.S. Patent No. to Swan 3,194,564 shows an arrangement similar
to the Polsky et al patent wherein a pair of pins are inserted in
the putter face to define the ball striking areas.
SUMMARY OF THE INVENTION
The present invention relates to a golf club head particularly for
a putter type club which overcomes the disadvantages of the prior
art and enables a putter type golf club to be used as a practice
device or a conventional putter. The putter includes an attachment
mounted across the striking surface of the putter face to define a
restricted area of the club striking face where a golf ball may be
properly struck when the putter is used as a practice device. The
attachment is preferably spaced equidistant from the center of
percussion or what is commonly known as the "sweet spot" of the
putter blade and at such a distance apart to permit room for the
striking of a golf ball when the ball is struck at the center of
percussion of the blade. This arrangement permits the ball to move
on a trajectory and line of travel normal to the putter blade when
the putting stroke is such so as to strike the ball on the center
of percussion of the blade; however, when the putter blade is
stroked in such a way that a ball would be struck significantly off
of a line defining the center of percussion, the ball will hit the
attachment to cause an extreme variation from the intended line of
flight.
When the putter is to be used in a conventional manner, the
attachment is mounted in a position away from the putter blade
face, preferably at the rear of the putting head, thereby
presenting a normal club face for striking a golf ball.
Alternately, an insert having similar weight and mass distribution
characteristics to the attachment may be used as a replacement
while maintaining the characteristics of the practice version of
the putter.
In this manner, the putter may be used as both a normal putter and
as a practice device without changing the essential feel or weight
characteristics of the putter. More specifically, both the total
weight and the center of percussion location are identical for the
practice and normal configurations. The putter also retains
essentially the same streamlined appearance whether used as a
practice device or normal putter.
Among the objects of the present invention are the provision of a
putter type golf club which can be used as a practice device or a
conventional putter while maintaining the identical weight and
swing characteristics whichever way the putter is used, the
provision of a putter which is used as a practice device or
conventional putter while maintaining essential visual
characteristics when used in either manner and the provision of a
putter which when used as a practice device will provide an
immediate and apparent indication that the ball has been struck at
a point other than the center of percussion.
These and other objects will become apparent in view of the
following specification and accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates a front elevational view of a putter employing
the present invention in a practice configuration;
FIG. 2 is a top plan view of the putter of FIG. 1 showing two
positions of impact with a golf ball;
FIG. 3 is a bottom view of the putter of FIG. 1;
FIG. 4 is an exploded perspective view of the putter of the present
invention;
FIG. 5 is a bottom perspective view of the putter in a normal
configuration;
FIG. 6 is a view of an alternate embodiment of the invention.
FIG. 7 is a top plan view of FIG. 6 taken along line 7--7;
FIG. 8 is a perspective view of a third embodiment of the
invention;
FIG. 9 is a sectional view of FIG. 8 taken along line 9--9;
FIG. 10 is a front elevational view of a fourth embodiment of the
invention; and
FIG. 11 is a top plan view of FIG. 10.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1 to 4 illustrate one embodiment of the putter of the present
invention. The putter is generally designated by the numeral 10. It
will be appreciated the drawings show only the head section of the
putter; however, the club includes a conventional shaft and
grip.
The putter head is modified by a slot 14 cut into the bottom of the
putter head behind the striking face 11 of the blade and is at a
location where it is symetrical about the center of percussion or
sweep spot of the putter. Two smaller slots 16 and 18 are cut
completely across the lower portion of the putter face
perpendicular to and in communication with the slot 14. The slot 14
is provided with a threaded bore 20 adapted to receive a screw
21.
An attachment 12 is formed of a rectangular plate 23 which fits
into the corresponding slot 14 cut out of the bottom of the putter
head. The attachment 12 includes two members 22 extending from the
ends of the rectangular plate 23, each of which supports one of a
pair of vertically upstanding bars 24 which lie across and project
from the striking face 11 of the putter blade. The shape of
attachment 12 is not critical, but may be any convenient shape or
size as long as it can be readily mounted on and removed from the
putter head. However, an important feature of the invention is that
the mass of the attachment 12 is symetrical about its center in
order that when it is fit into the slot 14, it is symetrical with
the center of percussion of the putter and reversal of the
attachment 12 does not alter the weight and/or swing
characteristics of the club. The attachment 12 is secured by a
screw 21 which engages the threaded bore in the putter head, but
any suitable fastening means may be used. By way of example, two or
more screws or clamps may be used. Also, the attachment is shown as
being detachable from the putter head; however, it may be
permanently mounted on a spring biased post so it may be turned
without the necessity of completely detaching the attachment from
the club head.
When the putter is used as a practice device, the rectangular plate
23 of the attachment 12 is placed in the slot 20, the members 22
fit into the smaller slots 16 and 18 and the bars 24 project
vertically across the striking face 11 of the putter face
equidistant from the center of percussion of the putter head. The
distance between the bars is designed to permit a golf ball to be
struck at the center of percussion, or nearly so, without
interference with either of the vertical bars. However, if the
putter is stroked in such a way to produce a striking of the ball
significantly displaced either side of the center of percussion,
the ball will be struck by one of the bars 24 which will cause a
pronounced variance in the line of travel of the ball from normal.
In this way, any stroke differing from a near perfect stroke will
not provide a proper striking of the ball and subsequent straight
line of travel.
When the putter is used as a conventional club for normal playing,
as illustrated in FIG. 5, the position of the attachment 12 is
reversed in the slots 14, 16 and 18 and the bars 24 project into a
rearward portion of the putter, away from the hitting face 11 of
the putter blade. With this arrangement, the weight and mass
characteristics of the putter remain essentially the same as when
the putter is used for practice because the attachment 12 is
symetrical about the center of percussion and the player will
continue to experience the same feel of the club to which he has
become accustomed to in practicing when using the club for normal
play.
FIGS. 6 and 7 illustrate an alternate embodiment of the invention
used as a practice device. The attachment takes the form of a pair
of members 60 and 62 which generally conform to the shape of the
club 64. The members 60 and 62 are positioned at either end of the
putter blade so as to form a limited or restricted hitting area on
the striking face 65 of the blade. As with the previously described
club, the members 60 and 62 are shaped to form the restricted
striking area which is symetrical about the center of percussion of
the putter. Screws 68 are shown as the means of securing the
members 60 and 62; however, it will be appreciated any suitable
fastener may be employed.
When the putter is used in a normal manner, the members 60 and 62
are secured to the back of the putter so as to be symetrical with
the center of percussion of the club. This position is shown in
phantom in FIG. 7. This arrangement of the members also creates a
heel-toe weighting characteristic for the putter which is popular
among prior art putters.
FIGS. 8 and 9 illustrate another alternate form of the invention
for use with a mallet head type of putter 80. In this embodiment,
the attachment 82 may take the same essential form as the member 12
shown with respect to the embodiment of FIGS. 1 to 5. The putter 80
is modified in order to provide slots and a pair of holes 84, as
shown in the sectional view of FIG. 10, which are adapted to
receive the vertical bars 86 of the attachment 82. In other
respects, the structure and use of the putter is the same as the
embodiment described above.
FIGS. 10 and 11 show still another embodiment of the invention. A
putter 100 includes an attachment in the form of a pair of
vertically upstanding bars 102 and 104 which are attached directly
to the striking face 106 by suitable fastening means such as screws
108 to form the restricted striking area. The bars 102 and 104 are
mounted on the rear of the putter 100, as shown in phantom in FIG.
11, when the club is used for normal golf playing.
It will be appreciated that the invention is not restricted to the
particular putter shapes or the attachments shown and described in
the invention. Also, the attachments may be secured by a key latch
or other fastening means in place of screws. Also, the attachments
may be mounted on the face of club head in both the practice and
normal configurations as long as the normal configuration complies
with United States Golf Association rules.
The invention is not limited to putter type golf clubs and may be
equally applicable to conventional iron or wood type golf clubs
using the same principles described by the invention.
Therefore, the embodiments shown should not be regarded as limiting
the scope of the invention. Various changes and modifications may
be made which will fall within the spirit and scope of the appended
claims.
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