U.S. patent application number 09/820773 was filed with the patent office on 2002-10-31 for iron golf club for use in approach shot.
Invention is credited to Liao, Cheng-Chang.
Application Number | 20020160851 09/820773 |
Document ID | / |
Family ID | 25231689 |
Filed Date | 2002-10-31 |
United States Patent
Application |
20020160851 |
Kind Code |
A1 |
Liao, Cheng-Chang |
October 31, 2002 |
Iron golf club for use in approach shot
Abstract
An iron golf club comprises a shaft, a grip fastened with one
end of the shaft, and a head fastened with other end of the shaft.
The head has a head angle ranging between 10 and 60 degrees. The
shaft has a shaft angle ranging between 65 and 90 degrees. The head
has a center of gravity, which is located at the center of a sole
of the head.
Inventors: |
Liao, Cheng-Chang; (Yun Lin
Hsien, TW) |
Correspondence
Address: |
BROWDY AND NEIMARK, P.L.L.C.
624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
|
Family ID: |
25231689 |
Appl. No.: |
09/820773 |
Filed: |
March 30, 2001 |
Current U.S.
Class: |
473/300 ;
473/324 |
Current CPC
Class: |
A63B 53/00 20130101;
A63B 53/04 20130101; A63B 60/00 20151001; A63B 53/14 20130101; A63B
53/047 20130101 |
Class at
Publication: |
473/300 ;
473/324 |
International
Class: |
A63B 053/14; A63B
053/04 |
Claims
What is claimed is:
1. An iron golf club for approach shot, comprising: a shaft; a grip
fastened with one end of said shaft; and a head fastened with other
end of said shaft such that said head has a head angle ranging
between 10 and 60 degrees, and that said shaft has a shaft angle
ranging between 65 and 90 degrees, and further that the center of
gravity of said head is located at the center of a sole of said
head.
2. The iron golf club as defined in claim 1, wherein said grip has
an arcuate back portion to facilitate the swinging of said iron
golf club in a pendular manner.
3. The iron golf club as defined in claim 1, wherein said shaft has
a length of 34 inches.
Description
FIELD OF THE INVENTION
[0001] The present invention relates generally to a golf club, and
more particularly to an iron golf club for use in the approach
shot.
BACKGROUND OF THE INVENTION
[0002] The golf course is generally provided in proximity of the
putting green with obstacles such as bunker pond, tall grass etc.
The approach shot is intended to knock the ball onto the putting
green and moving the ball toward the flag as close as possible.
Certain technics such as lob, pitch and chip are applied to
approach shot depending on the ball and green situation.
[0003] As shown in FIGS. 2 and 3, a conventional iron golf club has
a relatively longer shaft 1, which form with the surface an angle
.theta..sub.1 at least smaller than 65 degrees. In the meantime,
the golf club has a golf club head angle .theta..sub.2 which is at
least greater than 10 degrees. Such a conventional iron golf club
as described above has a greater arm of force as well as a greater
moment of force enabling the ball to travel farther. The greater
head angle .theta..sub.2 causes the ball to take off at a greater
angle.
[0004] In light of the design of the shaft 1 and the shaft angle
.theta..sub.1, the head 2 is separated from the body of a golfer by
a greater distance and is therefore less favorable for the golfer
to swing the club in the pendular manner. In the meantime, the
center of gravity of the head 2 is located on the front end 3,
thereby resulting in deviation of the head 2 at the time when the
golf club is swung. The deviation may add up the head speed of the
club and create longer distance. But on the other hand, it becomes
more difficult for the club head to move linearly and hit the ball
with precision.
[0005] When the ball is near the green within the distance that
requires less than 1 1 2
[0006] swing, one of the ideal ways for such approach shot is
[0007] (1) keep eyes right above the ball.
[0008] (2) swing in pendular manner. (As illustrated in FIG. 1)
[0009] (3) try to keep the club head along the target line as long
as possible.
[0010] With this way, it is easier to make a stable and
well-controlled approach shot. But conventional iron club is not
suitable for this way of approach shot.
SUMMARY OF THE INVENTION
[0011] The primary objective of the present invention is to provide
an iron golf club for use in approach shot.
[0012] In keeping with the principle of the present invention, the
foregoing objective of the present invention is attained by the
iron golf club comprising a shaft, a grip, and a head. The grip is
fastened with one end of the shaft. The head is fastened with other
end of the shaft. The head angle ranges between 10 and 60 degrees,
whereas the shaft angle ranges between 65 and 90 degrees. The
center of gravity of the head is located at the center of the sole
of the head.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 shows a schematic view of the pendular mode of
swinging a golf club.
[0014] FIG. 2 shows a side view of an iron golf club of the prior
art.
[0015] FIG. 3 shows a partial enlarged view of the iron golf club
of the prior art as shown in FIG. 2.
[0016] FIG. 4 shows an exploded view of a preferred embodiment of
the present invention.
[0017] FIG. 5 shows a perspective view of the preferred embodiment
of the present invention.
[0018] FIG. 6 shows a partial enlarged view of the preferred
embodiment of the present invention.
[0019] FIG. 7 shows a side view of the preferred embodiment of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0020] As shown in FIG. 4, an iron golf club 10 embodied in the
present invention comprises a shaft 11, a grip 12, and a head
13.
[0021] The grip 12 is fastened with one end of the shaft 11 and is
provided with an arcuate back portion to facilitate the swinging of
the golf club 10 is the pendular manner.
[0022] As shown in FIG. 5, the head 13 is made of metal by
precision casting and is formed of a main body 131 and a connection
portion 132. The main body 131 is provided with a ball-hitting face
133 and a sole 134. The connection portion 132 is extended from one
end of the main body 131 for connecting the shaft 11. As shown in
FIGS. 6 and 7, the sole 134 of the head 13 is rested on the ground
surface such that the ball-hitting face 133 and an imaginary
extension line A form a head angle .theta..sub.3, as shown in FIG.
6, which is of 40 degrees. Now referring to FIG. 7, the shaft 11
and the ground surface form a shaft angle .theta..sub.4 of 80
degrees or so.
[0023] The shaft 11 has a length of 34 inches or so, which is
shorter than the shaft of the conventional iron golf club. The
shaft angle .theta..sub.4 of 80 degrees is greater than the shaft
angle of the conventional iron golf club. In light of the design of
the shaft 11 and the design of the shaft angle .theta..sub.4, the
golf club 10 is suitable for use in hitting the ball in the
pendular manner such that the head 13 is located right under the
eyesight of a golfer holding the grip 12, and that the golf club 10
is swung to and fro in the pendular manner so as to enable the head
13 to move linearly to hit the ball with precision. In view of the
head angle .theta..sub.3 being 40, the ball takes off at a greater
angle. The center of the gravity of the head 13 is located at the
center of the sole of the head 13, thereby preventing the head 13
from being deviated to enable the ball-hitting face 133 to hit the
ball without fault. As a result, a better ball controllability is
achieved.
* * * * *