U.S. patent number 3,794,328 [Application Number 05/311,107] was granted by the patent office on 1974-02-26 for golf club head.
Invention is credited to Earl B. Gordon.
United States Patent |
3,794,328 |
Gordon |
February 26, 1974 |
GOLF CLUB HEAD
Abstract
A conventional wooden golf club head, contains a pair of
parallel air passages beginning at the ball striking area and
terminating at the rear of the club. The passages are located
substantially midway between the top and bottom surfaces of the
head and are spaced from each other, with one passage being located
near the toe of the head and one near the heel. A perforated insert
occupies each passage and is coplanar with the ball striking
surface. The inserts are threadedly engaged with hollow brass tubes
which fill the portion of the passageways extending away from the
striking surface.
Inventors: |
Gordon; Earl B. (Louisville,
KY) |
Family
ID: |
23205438 |
Appl.
No.: |
05/311,107 |
Filed: |
December 1, 1972 |
Current U.S.
Class: |
473/327;
473/337 |
Current CPC
Class: |
A63B
53/0466 (20130101); A63B 53/04 (20130101); A63B
60/50 (20151001); A63B 60/00 (20151001); A63B
60/006 (20200801); A63B 2225/01 (20130101); A63B
53/0416 (20200801); A63B 53/0458 (20200801) |
Current International
Class: |
A63B
53/04 (20060101); A63b 053/04 () |
Field of
Search: |
;273/77R,78,167E,167J,169,171,173,170 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
194,823 |
|
Mar 1923 |
|
GB |
|
1,058,560 |
|
Feb 1967 |
|
GB |
|
1,056,979 |
|
Feb 1967 |
|
GB |
|
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Apley; Richard J.
Attorney, Agent or Firm: Berman, Bishoff & Platt
Claims
I claim:
1. An improved golf club wood head having a heel and toe, a
striking face and a rear face, comprising:
a. a first substantially cylindrical passage adjacent said toe and
passing completely through said head from the ball striking area of
said striking face to said rear face;
b. a second substantially cylindrical passage substantially
parallel to said first passage adjacent said heel and passing
completely through said head from said striking face to said rear
face; and
c. a weighted substantially cylindrical insert means having a
substantially greater density than said wood head, fixedly mounted
in each of said passages for communicating said striking face with
said rear face, each of said insert means comprising:
i. a first cylindrical member having a plurality of spaced,
parallel perforations therein extending from the ball striking area
of the striking face of said head and terminating short of the rear
face of said head; and
ii. A second hollow cylindrical member commencing at the
termination of said first member and terminating at the rear face
of said head.
2. The wood head set forth in claim 1 wherein said first
cylindrical member is threadedly engaged with said second
cylindrical member.
3. The wood head set forth in claim 2, wherein said first
cylindrical member comprises a first substantially solid portion
containing said perforations and an internally threaded,
substantially hollow second portion for receiving said second
hollow cylindrical member.
4. The wood head set forth in claim 3, wherein an annular shoulder
is located in each of said passages for abutting said hollow
portion of said first cylindrical member.
5. The wood head set forth in claim 1, wherein said passages are
located substantially midway between the upper and lower surfaces
of said head.
6. The wood head set forth in claim 1, wherein each of said
passages includes an abutment for engagement with said inserts.
7. The wood head set forth in claim 6, wherein each of said
abutments comprises an annular shoulder extending into its
respective passage.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to improved golf club heads and more
particularly relates to perforated inserts for insertion in
passages provided in wooden golf club heads to reduce the air
friction during the swing and thereby increase the speed and force
of the swing, thus producing improved driving performance.
2. The Prior Art
A number of prior art patents disclose the concept of golf club
heads having openings therein. This feature is generally shown in
U.S. Pat. No. 780,776 to Brown, U.S. Pat. No. 1,336,671 to Backus,
U.S. Pat. No. 1,414,124 to Griffin, U.S. Pat. No. 1,697,846 to
Anderson and U.S. Pat. No. 3,468,544 to Antonious. However, the
unique structure of the present invention represents an improvement
over the prior art which results in ease of assembly, structural
stability and improved air flow characteristics.
SUMMARY OF THE INVENTION
The inventive feature of the present invention resides in the use
of perforated inserts which are placed in two parallel passages
located substantially midway between the top and bottom surfaces of
the head. The perforations, arranged in a symmetrical pattern, run
from the striking surface of the club a short distance toward the
rear of the club. The air exit portion of the passageway is filled
with a hollow brass tube which threadedly engages the perforated
insert.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front elevational view of a golf club containing the
inserts of the present invention;
FIG. 2 is a rear elevational view of the same golf club containing
the inserts of the present invention;
FIG. 3 is a sectional view taken on the line 3--3 in FIG. 2,
looking in the direction of the arrows;
FIG. 4 is a sectional view taken on the line 4--4 in FIG. 1,
looking in the direction of the arrows; and
FIG. 5 is a perspective view of the perforated insert of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring now to the drawings, there is shown a preferred
embodiment of the present invention. A wooden golf club head 10 of
conventional design is provided with two parallel passageways 16
extending from the front ball striking surface 15 to the rear
surface 14 of the club. Extending from the rear surface and filling
passageway 16 are hollow brass tubes 11 which threadedly engage
perforated inserts 20, the outer surfaces of which are coplanar
with front surface 15 of club head 10.
As can be seen in FIG. 5, insert 20 is cylindrical in configuration
and comprises a first solid portion 17 having perforations 12
therein arranged in a symmetrical pattern, and a second hollow,
internally threaded portion or sleeve 18 for threadedly engaging
tubes 11.
In a preferred embodiment, inserts 20 are formed of aluminum rods,
three-quarters of an inch in length, and 1/2 inch in diameter. The
inner diameter of portion 18 is three-eighths of an inch while
perforations 12 are one-sixteenth of an inch in diameter with a
depth of one-quarter of an inch. Brass tubes 11 are three-eighths
of an inch in diameter. Passages 16 are 1/2 inch in diameter from
the front surface 15 to a depth of 1/2 inch and then reduced at
shoulders 22 to a diameter of three-eighths of an inch to
accommodate brass tubes 11.
In assembling the improved golf club head of the present invention,
perforated inserts 20 are first inserted from the front surface 15
of the club and then brass tubes 11 are screwed, from the rear,
into internally threaded portions 18 of the inserts. Shoulders 22
provide abutments to prevent the inserts 20 from being driven
inside the passageways 16 by the impact of a golf ball, thereby
insuring that the outer surface of the inserts remains coplanar
with the ball striking surface 15. Perforations 12 are arranged so
that the passage of air therethrough communicates with the interior
of tubes 11, as shown in FIG. 4. The perforations may be drilled in
inserts 20 prior to insertion in the club head, or this operation
may be performed after insertion. After tubes 11 and perforated
inserts 20 are in place, they may be epoxied or otherwise cemented
to insure their retention in passages 16.
There has thus been described a new and improved structure for
permitting the passage of air from the front to back of a golf club
head during the swing, materially reducing the air friction during
the swing, thereby increasing the speed and force of the swing and
producing a better driving performance.
While a specific embodiment of the invention has been described, it
will be realized by those skilled in the art that various
modifications may be made therein and it is, therefore, intended
that the scope of the invention be defined only by the claims
appended hereto.
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