Golf putter

The golf club putter comprises a body having a face piece attached to a front portion of the body. The pitch of the face piece may be changed by removing the face piece and replacing it with a face piece having a different pitch. The body comprises a rearwardly projecting flange and a curved bottom surface having upwardly curved front and rear surfaces. The face piece is elevated as a result of the upwardly curved front bottom surface so that a golf ball may be stricken above its center to create a forward top-spin on the ball.

FIELD OF THE INVENTION 
The present invention relates to the field of golf clubs and particularly 
to golf putters. 
BACKGROUND OF THE INVENTION 
In the game of golf, putting is a critical part of the game. A putter must 
be useful in a wide variety of golfing conditions, such as putting on long 
or uneven grass surfaces and slopping greens. A putter also must 
accommodate varying stances, swinging styles and strengths of golfers. 
Many attempts have been made to develop golf putters which accommodate the 
variety of golfing conditions and special needs of golf players. However, 
there remains a need for an improved putter. 
One example of a prior art putter is shown in U.S. Pat. No. 4,881,739 to 
Garcia. The Garcia golf putter has a flat bottom portion and a curved 
forward surface which terminates in an elevated leading edge which imparts 
an over-spin to the golf ball when struck therewith. Because the Garcia 
putter has what is in effect a striking edge instead of a flat surface, 
uniform putting is believed more difficult. In addition, the vertical rear 
wall of the Garcia putter would tend to hang up on taller grass or 
non-uniformities in the surface, for example when putting from the fringe 
of the green, interfering with the putting stroke. 
A golf putter having a flat bottom, vertical rear surface and a removable 
face bar is disclosed in U.S. Pat. No. 3,333,854 to White. The face bar is 
removed to expose an upper edge to impart an over-spin to the golf ball. 
White also discloses a semicircular sighting device with sight lines on 
the upper surface of his putter in a color which contrasts with the black 
putter head. White also suffers from drawbacks such as described above in 
connection with Garcia. 
The use of removable weights in a golf club putter is shown in U.S. Pat. 
No. 4,121,832 to Ebbing. The patent teaches the use of weights to enable a 
player to experiment with different swing weights until the player arrives 
at a desired weight. The club head includes a removable face plate having 
a cavity formed on the inside thereof for receiving removable weights. The 
face plate has a striking surface formed with either a negative or 
positive pitch (loft) relative to the vertical. 
A need remains for a versatile golf putter that is suitable for a variety 
of golfing conditions. 
SUMMARY OF THE INVENTION 
The invention comprises a club body with a bottom surface with upwardly 
curved front and rear surface portions. Consequently, the putter tends to 
ride smoothly over grass and irregularities in the ground for a smoother 
putting stroke. The upwardly curved front surface elevates a strike 
surface of the face of the putter so that a golf ball may be stricken by 
the strike surface above its center to create a forward top-spin on the 
ball. A forward top-spin is desirable because it assists in causing the 
golf ball to travel in a straight line. The rear portion of the body has a 
rearwardly projecting flange to balance the weight distribution of the 
golf club head. 
The pitch of the striking surface of the putter may be changed by removing 
the face piece and replacing it with a face piece having a different 
pitch. The weight of the club may be adjusted by machining or otherwise 
removing material from a rear surface of the face piece. Further, the 
balance of the club (for example, the heel to toe balance) may be changed 
by controlling the location from which the material is removed from the 
face piece. 
The club also has a stroke guide in the form of a band across the top 
surface of the club which has a width which approximates the diameter of a 
golf ball. During a stroke, the golfer's eye sees the latent image of the 
guide band as the club moves, which assists the golfer in moving the 
putter along the desired stroke path. 
It is accordingly one object of the invention to provide an improved golf 
putter. 
The present invention relates to the above object, features and advantages 
of the putter individually, as well as collectively.

DETAILED DESCRIPTION OF THE INVENTION 
The figures illustrate a preferred embodiment of a golf putter 10 of the 
present invention. The golf putter 10 generally comprises a body 12 having 
a curved bottom surface 14 and a rearwardly projecting flange 16. The body 
is preferably formed in one piece and is most preferably, but not 
necessarily, made of a non-resilient durable material such as steel. Of 
course, the body may be formed of multiple piece construction and made of 
other materials such as wood, ceramics and polymeric materials, if 
desired. Body 12 is preferably, but not necessarily, a dark color such as 
black for purposes explained below. 
The curved bottom surface 14 has an upwardly curved rear bottom surface 
portion 24 and an upwardly curved front bottom surface portion 26. The 
rear bottom surface 24 extends from a low point or nadir point 21 
rearwardly to form a bottom portion of flange 16. Similarly, the front 
bottom surface 24 extends from nadir point 21 to a lower edge 27 of an 
upright, preferably vertical front portion 20. 
Because the front and rear-most portions of the club are elevated relative 
to the lower-most portion of the club, during a strike the putter does not 
tend to hang up on longer grass (such as at the fringe of the green) or 
other obstacles which could interfere with the stroke. The smooth 
continuous curve of the lower surface of the club also minimizes the 
possibility of the club hanging up or catching during a putting stroke. 
The bottom surface 14 also forms a curved surface sideways extending from a 
first side or heel side surface 23 to an opposite second side or toe side 
surface 25 of body 12. Thus, bottom surface 14 is curved from the rear to 
the front of the putter head and from the heel to the toe of the putter 
head. 
The side surfaces 23 and 25 extend from bottom surface 14 to a flat 
horizontal top surface 30. The side surfaces 23 and 25 are tapered from 
front portion 20 to an upright back surface 36, which may be vertical, at 
a rear portion of the putter head. 
The back surface 36 extends from top surface 30 down to an upwardly 
inclined upper surface 42 of flange 16. The upper surface 42 projects 
rearwardly and upwardly from the lower portion of back surface 36 and 
terminates at a rounded peripheral edge 44. Among other things, the flange 
16 functions to counter balance the front portion 20 of the club head 10 
and a removable face piece 18 attached thereto as the head is being swung 
by a golf player (not shown). The back surface 36 has two horizontal screw 
holes 38, 40 formed therein and projecting through body 12 from back 
surface 36 into a face-piece receiving recess 28 formed in the opposite 
front portion 20. 
The recess 28 extends from lower edge 27 up to an upper front edge 29 of 
top surface 30 of body 12. The top surface 30 is substantially flat and 
defines a shaft receiving opening 34 for threadably receiving a golf shaft 
35. It is to be understood that opening 34 may be either vertical or 
inclined to angle shaft 35 inserted therein to the left, right, forward or 
backward depending on the special needs of the golf player. 
A stripe 46 is provided on the upper surface of the putter head. Stripe 46 
is a color which preferably contrasts with and is lighter than the color 
of the upper surface of the putter body. Most preferably stripe 46 is 
white on a black body. The stripe 46 may be placed centrally on body 12 
and extends from peripheral edge 44 across upper surface 42 and top 
surface 30. Of course, stripe 46 may be of a color different than white 
and body 12 may have no stripe placed thereon. Stripe 46 preferably has a 
width which is about the diameter of a golf ball (not shown). As the golf 
player looks at and swings golf club head 10, the player's eyes retain the 
latent image of stripe 46 as a line (due to the high contrast between the 
white line and the black background) which assists the golfer in 
maintaining a straighter stroke so that the golf ball may be hit more 
accurately. 
The removable face piece 18 is optional and is attached to front portion 20 
of body 12. The face piece is preferably, but not necessarily, made of a 
metal such as brass. However, the face piece may also be made of other 
materials such as wood, ceramic or moldable plastic materials. The face 
piece 18 has a flat strike surface 21 for striking golf balls. The strike 
surface 21 has rounded lower corners 49 and a curved bottom edge 50. 
Face piece 18 further comprises curved side surfaces 51, 53, an upwardly 
curved bottom portion 55 and a flat top surface 57. Face piece 18 also 
comprises an inner portion 52 for engaging front portion 20 of body 12. 
The inner portion 52 has a protrusion member 54 dimensioned to matchingly 
fit inside recess 28 of body 12. The protrusion member 54 extends from top 
surface 57 to bottom portion 55 of face piece 18 and has two threaded 
holes 59, 61 formed therein. 
The protrusion member 54 may be attached to front portion 20 by fasteners, 
such as allen head screws 64, 65 inserted through the holes 38, 40 at the 
back surface 36 and then threaded into threaded holes 59, 61, respectively 
formed in protrusion member 54. A large central cavity 68 is formed in 
protrusion member 54. Cavity 68 may be used to hold weights or otherwise 
in adjusting the weight and the weight distribution of the putter, such as 
explained in detail below. 
When face piece 18 is attached to body 12, the face piece is aligned or 
flush with body 12 to form smooth contiguous surfaces. For example, side 
surfaces 51, 53 of face piece 18 and side surfaces 23, 25 of body 12 are 
flush. Also, bottom portion 55 and front bottom surface 24 is flush. This 
flushness reduces the risk of the club head 10 hanging up on the grass as 
the club head moves over the grass. 
A significant advantage of the curved front bottom surface 24 and the flush 
bottom portion 55 is that they together elevate strike surface 21 off the 
green so that the strike surface 21 may strike the golf ball above the 
center of the golf ball to impart a forward top-spin on the ball. An 
over-spin is often desirable because the ball tends to travel in a 
straight line and there is less risk of undesirably lifting the ball off 
the green which could cause the ball to bounce in an uncontrolled manner. 
In addition, a flat strike surface allows the golfer to vary the elevation 
of the putting stroke somewhat while still impacting the ball with a flat 
portion of the strike surface. This contributes to uniform putting 
results. 
As shown in FIGS. 6, the pitch or the angle of strike surface 21 may be 
changed by replacing face piece 18 with another face piece having a 
different pitch. The pitch may be defined as the degree of inclination of 
the striking surface with respect to the vertical. The face piece may 
either have a positive pitch (line a in FIG. 6) or negative pitch (line 
b). For example, the strike surface 21 may have a +20.degree. pitch or a 
-20.degree. pitch. Of course, other angles may be used ranging from 
0.degree. to over 60.degree. pitch. A striking surface having a positive 
pitch angle tends to create more forward top-spin than a striking surface 
having a negative pitch. A negative pitch may be used when it is desirable 
to lift the golf ball such as when the grass surface between the golf ball 
and the golf hole is very uneven. Of course, the striking surface 21 may 
be substantially vertical (see line c of FIG. 6) i.e. having no positive 
or negative pitch. 
The weight of golf club head 10 may be varied by using a lighter or heavier 
material for body 12 and face piece 18. The weight may also be adjusted by 
varying the size of the central cavity 68 formed within protrusion member 
54. The larger the size of cavity 68, the lighter the putter head. 
The weight distribution of putter head 10 may also be adjusted by using a 
face piece having toe, heel or neutral weighting. For example, the putter 
head 10 may be made toe heavy by adding more weight to cavity 68 at a toe 
portion 70 or removing weight from cavity 68 at a heel portion 72 (see, 
for example, FIG. 8). Similarly, the club head may be made heel heavy by 
adding more weight to heel portion 72 or removing weight from toe portion 
70. As is apparent, the weight of club head may be distributed neutrally 
or equally by adjusting the weight of either toe portion 70 or heel 
portion 72 to create an even balance between toe portion 60 and heel 
portion 62. 
While the present invention has been described in accordance with the 
preferred embodiment, it is to be understood that certain substitutions 
and alternations may be made thereto without departing from the spirit and 
scope of the claims.