U.S. patent number 3,860,244 [Application Number 05/310,431] was granted by the patent office on 1975-01-14 for golf clubs of the type known as woods.
Invention is credited to Floyd M. Cosby.
United States Patent |
3,860,244 |
Cosby |
January 14, 1975 |
GOLF CLUBS OF THE TYPE KNOWN AS WOODS
Abstract
Golf clubs of the type known as "woods," wherein the torque
resulting from striking golf balls with the clubs is reduced,
wherein the length of the club head is reduced, wherein the shaft
is close to the heaviest weight concentration of the club, and
wherein the hitting face of the club occupies the entire front side
of the club to eliminate erratic shots off a rounded heel or toe of
the club, and wherein the hitting face is substantially flat in
order to reduce side spin on the ball.
Inventors: |
Cosby; Floyd M. (Rosenberg,
TX) |
Family
ID: |
26789990 |
Appl.
No.: |
05/310,431 |
Filed: |
November 29, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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95242 |
Dec 4, 1970 |
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Current U.S.
Class: |
473/314;
473/343 |
Current CPC
Class: |
A63B
53/0466 (20130101); A63B 53/04 (20130101); A63B
60/00 (20151001); A63B 53/045 (20200801); A63B
53/0458 (20200801) |
Current International
Class: |
A63B
53/04 (20060101); A63b 053/04 () |
Field of
Search: |
;273/77R,8C,164,167-175 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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8,954 |
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May 1893 |
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GB |
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160,030 |
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Mar 1921 |
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GB |
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5,739 |
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Mar 1910 |
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GB |
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7,550 |
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Apr 1900 |
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GB |
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12,743 |
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Jun 1901 |
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GB |
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2,991 |
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Feb 1907 |
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GB |
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Other References
"Macgregor Golf Goods;" 1927; pages 4, 5, and 8..
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Primary Examiner: Apley; Richard J.
Attorney, Agent or Firm: Fox, Jr.; Carl B.
Parent Case Text
REFERENCE TO EARLIER FILED APPLICATIONS
This application is a continuation-in-part of application Serial
No. 95,242, filed Dec. 4, 1970 by the same applicant and entitled
"Golf Irons and Woods", which application is now abandoned.
Claims
I claim:
1. Golf club of the type referred to as a wood, comprising a
horizontally disposed club head having the front side thereof
completely flat to form a hitting face over its entire area whereby
a golf ball may be struck at any point thereof without angular
deflection of the golf ball, said hitting face having a loft angle
of conventional angular inclination for a wood-type club head, one
end of said club head being convexly curved backwardly and entirely
inwardly of one end of said hitting face and forming the heel of
the club head, the other end of said club head being convexly
curved backwardly and entirely inwardly of the other end of said
hitting face and forming the toe of the club head, the reverse side
of said club head being thickened rearwardly and convexly curved
symmetrically of the horizontal center of the club head and
smoothly merging with said convex curvatures of said heel and toe
in order to distribute the weight of the club head symmetrically
about a vertical plane perpendicular to the center of the hitting
face and to adjust the horizontal center of gravity of said club
head to its horizontal center whereby said club head will be less
likely to twist about vertically directed axes upon striking golf
balls at random points of said hitting face, the upper and lower
sides of said club head and of said hitting face being
substantially parallel whereby the heel and toe portions of the
club head are of substantially the same weight, a shaft having its
lower end fixed to the upper side of the heel of the club head, and
further having the length of said club head from the toe to heel
ends being approximately 31/2 inches and with the maximum distance
of the shaft axis to the center of the hitting face being
approximately 11/4 inches, the convexly curved heel of the club
head being angularly inclined downwardly and inwardly parallel to
the shaft axis from the upper edge of the heel substantially to the
lower edge of the heel and being spaced conventionally no farther
than five-eighths inch from the shaft axis.
2. The combination of claim 1, said hitting face being of
substantially shorter length along its lower edge than along its
upper edge.
Description
BACKGROUND AND SUMMARY OF THE INVENTION
As the wood golf club of the form presently used evolved from the
old form of wood club, the evolution being caused because of
improvements to golf balls and increased weight of golf balls, club
makers maintained the same length of the club head and thickened
and widened the club head more toward the toe, while maintaining
the heel configuration and the shaft position substantially the
same. This forced the balance point, or heaviest weight
concentration, of the club head toward the toe of the club head,
and it has remained there up to the present time. This evolution to
a longer club head and the placement of weight toward the toe of
the club head causes increased leverage of the shaft when a ball is
struck, and causes torque which reduces a player's control of the
head of the wood club.
A golf club is a driving tool, i.e., like a hammer, and if a hammer
were made with the heaviest weight concentration as far from the
axis of the handle as has been done with golf clubs, it would be
very difficult to drive a nail with the hammer.
Because of the longer club head which evolved, and the placement of
weight concentration toward the toe of the club head, it evolved
that the club hitting faces were made curved from heel to toe in
order to compensate for the off-position of the club face which
resulted from the high torque. With elimination of the torque
problem according to the precepts of this invention, it is now
possible to again make the hitting face flat, and by so doing the
chances of putting side spin on the ball which occurred with the
curved hitting faces can also be eliminated.
The more balanced position of the shaft with respect to the weight
concentration of the club head results in keeping the face of the
club square at the time of impact with the ball. Therefore,
according to this invention, not only is torque caused by ball
impact reduced, but torque caused by inbalance of the club head is
also reduced.
According to the invention, torque on the shaft resulting from
impact of the ball with the club head is reduced by reducing
leverage tending to twist the shaft as much as possible by moving
the shaft closer to the center of weight concentration of the club
head. The movement of the shaft position to a position closer to
the heaviest weight concentration not only makes the club head
shorter, but also reduces torque on the shaft caused by the weight
of the club head itself. According to the invention, the reduction
of side spin on the ball, which has been caused by the curved
hitting faces of clubs in their evolved conditions, is reduced by
making the hitting face substantially flat or completely flat,
which is possible because of the improvements to the torque
problem.
Other objects and advantages of the invention will appear from the
following detailed description of a preferred embodiment of
apparatus according to the invention,, reference during the
description being made to the accompanying drawings.
BRIEF DESCRIPTIONS OF THE DRAWINGS
FIG. 1 is a side perspective view of a wood golf club, taken
perpendicular to the hitting face of the club head.
FIG. 2 is a partial top view of the club shown in FIG. 1.
FIG. 3 is an elevational view taken toward the heel of the club
shown in FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings in detail, the club head 10 has a
flat inclined hitting face 11 which extends over the entire front
side of the club head. The heel and toe portions of the club head
do not extend beyond the inner and outer edges of said hitting face
11 or beyond rearward projections of the inner and outer edges
thereof. The hitting face occupies the entire front side of the
club, and the other sides of the club head are of substantially
symetrical curvature with respect to a vertical plane perpendicular
to the horizontal center of the hitting face and are disposed
entirely inward of the ends of the hitting face and rearward
perpendicular projections thereof, as will be clear from FIG. 2 of
the drawings. In other words, all inner and outer end portions of
the club head are at a lesser distance from said vertical plane
than are the inner and outer edges of the hitting face. The top
surface 14 of the club head is preferably either flat or slightly
uniformly convexly rounded, but may be of other symmetrical form.
The shape of the back side of the club head is symmetrically
rounded as is best seen in FIG. 2, in order that the weight
distribution of the club head is balanced with the center of
gravity or weight concentration being disposed along a line at its
center perpendicular to the center of the hitting face. The
vertical thickness of the head is substantially uniform from the
heel to the toe of the club head.
The shaft 15 is attached to the club head at a point spaced
rearwardly of the hitting face which extends in front of the shaft,
and at or close to the heel end of the top of the club head. A
hosel 16 is shown formed upwardly integrally with the club head,
but the hosel may be eliminated and the shaft connected directly
into a hole into the club head if desired.
Because of rules imposed by professional golfing associations, the
axis of the shaft cannot be farther from the heel of the club head
than five-eighths inch at any point. The club shown in the drawings
fully complies with this requirement. The angle of the shaft with
the bottom flat surface 18 of the club head is according to the
association rules required to be an angle of 54.degree.. The club
complies with this replacement.
The angle of the hitting face with the bottom face 18 of the club
head will vary depending upon the loft of the club, wood clubs
being numbered from the 1-wood, with least loft, to the 5-wood,
with greatest loft.
The length of the club head from heel to toe of conventional golf
clubs currently in use is about 41/2 inches. Although the length of
the hitting face of the clubs herein disclosed is longer than in
conventional clubs, the overall length of the club head is reduced
to about 31/2 inches. Since the length of the hitting face of the
herein disclosed club is longer, it is easier to hit the ball with
this club than with conventional clubs.
Because of the shaft position and the shortening of the club head,
the torque produced upon hitting a ball at any point of the hitting
face is greatly reduced. The reduction of the distance from the
ball impact position to the shaft axis may be as much as one inch,
and the torque produced by the ball impact is correspondingly
reduced. With a conventional club, the farthest distance from the
shaft axis to a ball impact point at the extreme toe end of the
hitting face will be approximately 41/2 inches. The distance from
the shaft axis to the center of the hitting face will be about 21/2
inches. With the herein disclosed clubs, the distance from the
shaft axis to the toe end of the hitting face will be about 31/2
inches while the distance from the shaft axis to the center of the
hitting face will be about 11/4 inches. Therefore, the leverage
radius is reduced by about one inch regardless of what portion of
the hitting face has impact with the ball. This change in club
design greatly reduces the torque produced on the shaft by ball
impact and reduces twisting resulting therefrom.
The above described reduction in twisting torque results because of
the shortening of the club head and the movement of the shaft to
behind the heel end of the hitting face. In conventional clubs, the
hitting face is entirely toward the toe end of the club head from
the shaft. The symmetrical design of the club head further reduces
torque because the club head weight is concentrated behind the
center of the hitting face.
Because of the reduction of torque described above, the hitting
face of the club head can be better controlled by a golfer to
squarely strike the ball. Therefore, since the ball can be struck
more squarely because of better club head control, the heel to toe
curvature of the hitting face can be eliminated. The conventionally
curved hitting face frequently results in raking of the hitting
face across the ball, this being caused by angularity of the
hitting face caused by the torque problem herein discussed. The
concentration of the club head weight behind the center of the
hitting face results in better club head speed and better impact on
the ball. The repositioning of the shaft augments this result. The
weight of the club head and the shaft driving force are centered
directly behind the ball. There is no tendency to allow the face of
the club to lay open and to drag the face across the ball, so that
the ball leaves the face of the club more quickly.
With the new pivot point of the club head around the shaft, the
club head swings squarely into the ball and drives it straight down
the fairway. Because the shaft is at least one inch closer to the
heaviest weight concentration in the head of the club, torque or
twisting about the shaft is reduced to almost nothing. Longer
leverage on the shaft resulting from the conventional longer-faced
clubs is reduced.
While the clubs have a shorter club head length from heel to toe,
there is a larger hitting face than in a standard club because all
of the face of this club is hitting face, and by keeping this face
as flat as possible with no curvature this club produces a
straighter hit ball. The flat face is much less likely to put side
spin on the ball, and will produce straight drives from the club
from almost any point of the hitting face that comes into contact
with the ball. The fact that the hitting face covers the entire
front side of the club head will eliminate uncontrollable drives
off of the heel or toe of the club head. No matter what part of the
hitting face comes into contact with the ball, the ball will be hit
harder and straighter because all of the weight of the club head is
centered and compressed into a more compact club head so that
whether a player makes contact with the ball at the heel, center or
toe of the hitting face, there is more solid impact on the ball
than is possible with a regular club.
As has been mentioned, the dimension from heel to toe of the club
head is preferably about 31/2 inches. The distance from the top to
the bottom of the hitting face may vary from about 11/2 inches to
two inches, in a club of preferred form. The bottom edge of the
hitting face will preferably be about 21/2 inches. The thickness of
the club head from the hitting face to the back will preferably be
abbout 23/4 inches in order to achieve the same weight as has been
present in conventional clubs. The weight of the club head will be
symmetrically disposed about a line from the center of the hitting
face to the center of the rear of the club head. The position of
the shaft should be about as shown in the drawings, a certain
amount of variation being possible without detriment of the
results.
While a preferred embodiment of the invention has been shown in the
drawings and described, many modifications thereof may be made by a
person skilled in the art without departing from the spirit of the
invention, and it is intended to protect by Letters Patent all
forms of the invention falling within the scope of the following
claims.
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