U.S. patent application number 14/897170 was filed with the patent office on 2016-07-14 for golf ball having balance rotation line and manufacturing method therefor.
The applicant listed for this patent is ACEGOlF CO, LTD.. Invention is credited to Young Jun KIM.
Application Number | 20160199700 14/897170 |
Document ID | / |
Family ID | 50893060 |
Filed Date | 2016-07-14 |
United States Patent
Application |
20160199700 |
Kind Code |
A1 |
KIM; Young Jun |
July 14, 2016 |
GOLF BALL HAVING BALANCE ROTATION LINE AND MANUFACTURING METHOD
THEREFOR
Abstract
A golf ball having a balance rotation line, wherein a balance
rotation line is formed on an arbitrary line in which a point for
marking the center of gravity of the ball is vertical to a joining
line on the ball, thereby enabling accurate putting; and a
manufacturing method therefor.
Inventors: |
KIM; Young Jun; (Gwangju,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ACEGOlF CO, LTD. |
Gwangju |
|
KR |
|
|
Family ID: |
50893060 |
Appl. No.: |
14/897170 |
Filed: |
September 4, 2014 |
PCT Filed: |
September 4, 2014 |
PCT NO: |
PCT/KR2014/008348 |
371 Date: |
December 9, 2015 |
Current U.S.
Class: |
473/378 ;
29/899 |
Current CPC
Class: |
A63B 37/0006 20130101;
A63B 45/02 20130101; A63B 45/00 20130101; A63B 37/0074 20130101;
A63B 37/0023 20130101; A63B 37/0022 20130101; A63B 43/008
20130101 |
International
Class: |
A63B 37/00 20060101
A63B037/00; A63B 45/02 20060101 A63B045/02 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 1, 2013 |
KR |
10-2013-0117287 |
Claims
1. A golf ball having a plurality of dimples and a joining line
formed on an outer circumferential surface thereof, comprising: a
marking point of the center of gravity formed and marked at a point
on a surface of the golf ball to which a straight line passing
through the center of the golf ball from the center of gravity
thereof reaches; and a balance rotation line formed on a
perpendicular line which perpendicularly connects the marking point
of the center of gravity and the joining line, wherein when the
marking point of the center of gravity is positioned at the joining
line of the golf ball, the balance rotation line is formed
perpendicular to the joining line, and when the marking point of
the center of gravity is positioned at a pole of the golf ball, an
arbitrary line among countless lines perpendicular to the joining
line is selected to form the balance rotation line thereon.
2. A method of manufacturing a golf ball on which a balance
rotation line is formed, comprising: forming a marking point of the
center of gravity to mark the marking point of the center of
gravity at a point on a surface of the golf ball to which a
straight line passing through the center of the golf ball from the
center of gravity thereof reaches; identifying a joining line to
identify the joining line of the golf ball on which the marking
point of the center of gravity is formed; and forming a rotation
line to form a balance rotation line on a perpendicular line which
perpendicularly connects the marking point of the center of gravity
and the joining line, wherein when the marking point of the center
of gravity is positioned at the joining line of the golf ball, the
balance rotation line is formed perpendicular to the joining line,
and when the marking point of the center of gravity is positioned
at a pole of the golf ball, an arbitrary line among countless lines
perpendicular to the joining line is selected to form the balance
rotation line thereon.
Description
TECHNICAL FIELD
[0001] The present invention relates to a golf ball on which a
balance rotation line is formed and a method of manufacturing the
same, and more particularly, a golf ball on which a balance
rotation line is formed on an arbitrary line, which perpendicularly
connects a marking point of the center of gravity and a joining
line of the golf ball, for putting by accurate hitting so that a
moving direction of the golf ball matches a direction desired by a
golfer after hitting the golf ball, and a method of manufacturing
the same.
BACKGROUND ART
[0002] Generally, when a driver shot or iron shot is performed in
golf, a posture of a player and a hitting point on a golf ball are
important for improving a driving distance of the golf ball.
Particularly, a portion of a golf ball spaced apart from the center
of the golf ball by a predetermined distance has to be hit in a
downward direction, then the golf ball reversely rotates and a lift
force occurs in a direction perpendicular to a moving direction of
the golf ball, and thus, the golf ball moves far away. When this
principle is applied to golf, particularly, in order to send a golf
ball flying far away in a desired direction, it is important to
recognize that each player accurately checks the center of gravity
of the golf ball to hit the golf ball.
[0003] Here, the golf ball is manufactured based on a diameter
greater than 1.68 inches (42.67 mm) and a weight lighter than 1.62
ounces (45.93 g) to be used for golf. As shown in FIG. 1,
generally, the golf ball includes a core (2) formed at the center
thereof and a cover (3) which surrounds the core (2).
[0004] However, since mass-produced golf balls have centers of
gravity different from each other and also have weights different
from each other, it is very difficult to find the center of gravity
of each golf ball and to set an upper point of the center of
gravity as a central axis of rotation thereof.
[0005] That is, since a core of a golf ball is heavier than a cover
thereof, when the core is not positioned at the center the golf
ball and is biased to one side thereof, a heavy side and a light
side are generated in the golf ball causing the golf ball to be an
unbalanced state, and thus, movement of the golf ball has to bend
in a direction of the heavy side because a weight distribution of
left and right sides thereof is non-uniform when the golf ball
rolls.
[0006] Accordingly, recently, a putting line has been arbitrarily
marked on an outer circumferential surface of a golf ball to be
used. However, the putting line causes a problem in that the golf
ball is hit inaccurately due to the low accuracy of the line.
[0007] Further, as shown in FIG. 2, a joining line (30) is formed
on a golf ball, and when the golf ball is rolled or sent airborne
by hitting, in the case in which the left and right sides of the
joining line (30) are not positioned at the same line as a line
connecting both sides of the golf ball perpendicular to a rotation
direction thereof, the accuracy of the hitting is low, and thus, it
causes a problem in that the golf ball is inaccurately hit due to
the low accuracy of the line.
[0008] DISCLOSURE The background technology of the present
invention is disclosed as Republic of Korea Patent Registration No.
10-1266061 (registered on May 14, 2013).
Technical Problem
[0009] The present invention is directed to providing a golf ball
on which a balance rotation line is formed so that the center of
gravity of the golf ball is checked, a marking point of the center
of gravity for indicating the center of gravity of the golf ball is
formed on an outer surface thereof, a balance rotation line is
formed on an arbitrary line which perpendicularly connects the
marking point of the center of gravity thereof and a joining line
thereof, and a straight directivity by rotation and a driving
distance are effectively secured when hitting the golf ball, and a
method of manufacturing the same.
Technical Solution
[0010] One aspect of the present invention provides a golf ball
having a plurality of dimples and a joining line formed on an outer
circumferential surface thereof, including a marking point of the
center of gravity formed and marked at a point on a surface of the
golf ball to which a straight line passing through the center of
the golf ball from the center of gravity thereof reaches, and a
balance rotation line formed on a perpendicular line which
perpendicularly connects the marking point of the center of gravity
and the joining line, wherein when the marking point of the center
of gravity is positioned at the joining line of the golf ball, the
balance rotation line is formed perpendicular to the joining line,
and when the marking point of the center of gravity is positioned
at a pole of the golf ball, an arbitrary line among countless lines
perpendicular to the joining line is selected to form the balance
rotation line thereon.
[0011] Another aspect of the present invention provides a method of
manufacturing a golf ball on which a balance rotation line is
formed, including forming a marking point of the center of gravity
to mark the marking point of the center of gravity at a point on a
surface of the golf ball to which a straight line passing through
the center of the golf ball from the center of gravity thereof
reaches; identifying a joining line to identify the joining line of
the golf ball on which the marking point of the center of gravity
is formed; and forming a rotation line to form a balance rotation
line on a perpendicular line which perpendicularly connects the
marking point of the center of gravity and the joining line,
wherein when the marking point of the center of gravity is
positioned at the joining line of the golf ball, the balance
rotation line is formed perpendicular to the joining line, and when
the marking point of the center of gravity is positioned at a pole
of the golf ball, an arbitrary line among countless lines
perpendicular to the joining line is selected to form the balance
rotation line thereon.
DESCRIPTION OF DRAWINGS
[0012] FIG. 1 is a view illustrating the inside of a general golf
ball.
[0013] FIG. 2 is a view illustrating a joining line formed on an
outer circumferential surface of the general golf ball.
[0014] FIG. 3 is a view illustrating a state of a golf ball
according to an embodiment of the present invention.
[0015] FIG. 4 is a flowchart for describing a method of
manufacturing the golf ball according to the embodiment of the
present invention.
MODES OF THE INVENTION
[0016] Hereinafter, a golf ball on which a balance rotation line is
formed and a method of manufacturing the same according to the
present invention will be described more fully with reference to
the accompanying drawings. In the description of the present
invention, when it is determined that a detailed description of the
related art of the present invention unnecessarily obscures the
gist of the present invention, the detailed description will be
omitted.
[0017] In addition, as the terms to be described below are the
terms set in consideration of functions of the present invention,
the terms may vary according to an intention of producers or
manufacturers by which products are manufactured. In the drawings,
the thicknesses of lines and sizes of components may be exaggerated
with respect to actual physical thicknesses and sizes for
convenience of description. Since the embodiments and drawings of
the present invention are merely exemplary embodiments and do not
fully cover the technical sprit of the present invention, it should
be understood that the present invention is to cover all
modifications, equivalents, and alternatives falling within the
spirit and scope of the present invention.
[0018] First, resistance generated from a fast flying golf ball
includes frictional resistance generated at a front surface of the
golf ball and form resistance generated at the rear thereof. The
frictional resistance is resistance generated at the golf ball due
to friction between air and the golf ball, and the form resistance
is resistance generated by a vortex of air which is generated at
the rear of the golf ball when the golf ball flies in the air.
[0019] The form resistance of the above resistances acts as a major
factor for degrading the properties of a trajectory and a driving
distance of the golf ball, and thus, a plurality of concave
grooves, i.e., referred to as dimples 10, are formed on an outer
surface of the golf ball to reduce the form resistance.
[0020] Since a flow of the air is relatively slow with respect to a
golf ball having the dimples 10 when compared with a golf ball
having no dimples, a vortex generated at the rear of the golf ball,
i.e., a wake generation region, is reduced, and thus, form
resistance, which is generated when the wake pulls the golf ball in
a direction opposite a flying direction thereof, is decreased.
[0021] When dimples are arranged on a surface of the golf ball, the
dimples are designed using various polyhedrons made by dividing a
surface of a sphere into a plurality of circles. For example, there
are many types of divided compositions of the sphere such as a
spherical tetrahedron having four spherical triangles, a spherical
hexahedron having six spherical quadrangles, a spherical octahedron
having eight spherical triangles, a spherical dodecahedron having
12 spherical pentagons, a spherical icosahedron having 20 spherical
triangles, etc.
[0022] Further, the dimples are arranged by additionally
subdividing the above spherical polyhedrons to classify the surface
of the sphere into a spherical 20-12 polyhedron, a spherical 6-8
polyhedron, etc. However, although all of the divided compositions
are divided into different spherical polyhedrons from each other to
arrange the dimples, they may eventually overlap each other in
spheres having the same diameter.
[0023] Nevertheless, the reality is that a golf ball having dimples
arranged by a new divided composition is manufactured. The reason
is that the size, depth, shape of each dimple may vary because the
sizes of surface areas of faces of the polyhedron may vary
according to the type of divided composition when the dimples are
arranged on an entire surface of a sphere.
[0024] As a result, new divided compositions are continuously made
because a flight characteristic varies according to arrangement of
each dimple. Further, when dimples are arranged on a surface of a
sphere using the above division method of the spherical polyhedron,
the dimples arranged symmetrical to each other within one face of
the polyhedron make an excellent flight characteristic when
compared with asymmetrical arrangement thereof even in the same
polyhedron.
[0025] Since the resistance of air is further uniform in a low
speed region from a peak of a trajectory to the ground to which a
golf ball drops while the golf ball flies, wobbling of the golf
ball is reduced, and thus, the golf ball lands with a stable arcing
trajectory.
[0026] Pressure drag more affects a large dimple than a small
dimple in a flying region from a hitting point of the golf ball to
the peak of the trajectory, i.e., a high speed region, whereas the
pressure drag less affects the large dimple than a small dimple in
the low speed region.
[0027] Accordingly, a new method of dividing a surface of a golf
ball sphere and an arrangement of dimples on the surface of the
divided sphere are important factors in order that the golf ball
has a more uniform landing property and an excellent driving
distance property.
[0028] Further, although an upper portion and lower portion of a
golf ball have been formed identically by forming the golf ball
having the dimples on an outer surface thereof by joining an upper
mold and a lower mold in a process of manufacturing the golf ball,
the dimples are arranged without regular criteria or rules. In
addition, a setup of the rules is difficult to arrange about 500
dimples within a diameter of 42.67 mm.
[0029] Accordingly, recently, various studies on arrangement,
numbers, various types of sizes, volumes, and forms have been
conducted to further increase a driving distance of a golf ball and
to improve the aerodynamic symmetry of the golf ball.
[0030] Further, the golf ball is manufactured by manufacturing a
core and pressing half covers from directions of both sides
thereof. However, when the golf ball is carefully checked, a
joining line caused by joining the half covers is formed
minutely.
[0031] In addition to the arrangement of the dimples for rotation
of the golf ball, a uniform weight distribution of left and right
sides of a golf ball based on a rotation line, and a joining line
30 positioned at the same line as a line connecting the left and
right sides based on the rotation line when a golf ball rolls are
very important factors.
[0032] Accordingly, an embodiment of the present invention is
directed to finding the center of gravity of the golf ball, to
forming a marking point of the center of gravity for indicating the
center of gravity on an outer surface of the golf ball, to forming
a balance rotation line 40 on an arbitrary line which
perpendicularly connects the marking point of the center of gravity
thereof and a joining line thereof so that a straight directivity
by rotation and a driving distance are more effectively secured
when hitting the golf ball.
[0033] That is, when the marking point of the center of gravity of
the golf ball is positioned on the rotation line of the golf ball,
after hitting the golf ball, since the center of gravity of the
golf ball is in a balanced state based on the rotation line,
wobbling of the golf ball is prevented while the golf ball rotates
and rolls, and thus, the straight directivity by rotation and the
driving distance of the golf ball can be secured.
[0034] Here, when the joining line is formed asymmetrical to the
line connecting left and right sides based on the rotation line of
the golf ball and the golf ball rotates and rolls by hitting,
resistance alternately acts on left and right sides of the joining
line based on the rotation line, and thus the wobbling of the golf
ball is generated. Thus, in the embodiment of the present
invention, the balance rotation line 40 is formed on an arbitrary
line which perpendicularly connects the marking point of the center
of gravity thereof and a joining line thereof so that the joining
line is positioned symmetrical to the line connecting the left and
right sides based on the rotation line, thereby preventing the
wobbling of the golf ball when the golf ball straightly rolls by
hitting the golf ball.
[0035] As shown in FIG. 3, a plurality of dimples and a joining
line are formed on an outer circumferential surface of a golf ball
1 according to the embodiment of the present invention, and a
marking point of the center of gravity 20 and a balance rotation
line 40 are formed on an outer surface of the golf ball 1.
[0036] The center of gravity of the golf ball 1 is found, and the
marking point of the center of gravity 20 is formed on a cover,
i.e., the outer surface of the golf ball 1, to recognize the center
of gravity thereof.
[0037] According to the embodiment of the present invention, in the
case in which salt water having a specific gravity greater than
water is used for marking the marking point of the center of
gravity 20 on the surface of the golf ball, when the golf ball is
put into the salt water, a part of the golf ball is exposed on a
surface of the salt water, and at this time, the marking point of
the center of gravity is marked at one of an exposed top point and
an opposite point symmetrical to the exposed top point. Here, since
it is difficult to mark the marking point of the center of gravity
at a point in the salt water, the marking point of the center of
gravity 20 may be marked at the exposed top point.
[0038] That is, the exposed top point where the marking point of
the center of gravity 20 is marked is formed at a point of the
surface of the golf ball to which a straight line passing through
the center of the golf ball from the center of gravity thereof
reaches.
[0039] Here, a method of finding the center of gravity of the golf
ball and marking the marking point of the center of gravity on the
outer surface of the golf ball is described using the salt water,
but is not limited thereto.
[0040] Further, as the balance rotation line 40 is formed on an
arbitrary line which perpendicularly connects the marking point of
the center of gravity 20 and the joining line 30, the balance
rotation line 40 is formed by a marker or printed on the outer
surface of the golf ball, and thus may not be removed easily.
[0041] In other words, as the balance rotation line 40 is marked
for easily recognizing a straight direction of the golf ball by a
user, a weight distribution of left and right sides of the golf
ball is uniformly formed based on the balance rotation line 40, and
the joining line 30 is positioned at the same line as a line
connecting left and rights sides based on the rotation line when a
golf ball rolls, and thus, after hitting the golf ball, the
straight directivity of the golf ball can be improved.
[0042] Further, even when the golf ball is sent flying far away by
hitting, a driving distance may also be increased due to the
improvement of the straight directivity of the golf ball.
[0043] Here, there are a case in which the marking point of the
center of gravity 20 for indicating the center of gravity of the
golf ball is positioned on a joining line of the golf ball and a
case in which it is positioned on a pole of the golf ball. When the
marking point of the center of gravity is positioned on the joining
line of the golf ball, the balance rotation line 40 is formed
perpendicular to the joining line 30, and when the marking point of
the center of gravity is positioned on a pole of the golf ball, an
arbitrary line among countless lines perpendicular to the joining
line is selected to form the balance rotation line 40 thereon.
[0044] Meanwhile, as shown in FIG. 4, a method of manufacturing the
golf ball according to the embodiment of the present invention
includes forming a marking point of the center of gravity (S10),
identifying a joining line (S20), and forming a rotation line
(S30).
[0045] The forming of the marking point of the center of gravity
(S10) includes forming the marking point of the center of gravity
at a point on a surface of the golf ball to which a straight line
passing through the center of the golf ball from the center of
gravity thereof reaches. Here, before forming the marking point of
the center of gravity 20 on an outer surface of the golf ball, the
center of gravity of each golf ball has to be found first.
[0046] After finding the center of gravity of the golf ball and
forming the marking point of the center of gravity 20 on the outer
surface of the golf ball, the joining line 30 generated in a
process of manufacturing the golf ball is identified.
[0047] That is, the golf ball is manufactured by manufacturing a
spherical core 2 and a cover 3. The cover 3 is divided into two
half covers, the half covers are pressed from directions of both
sides thereof to surround the core 2, and at this time, the joining
line 30, i.e., a line generated when the hemispherical covers are
joined, is made.
[0048] After identifying the joining line of the golf ball, the
forming of the rotation line (S30) is performed to form a balance
rotation line.
[0049] That is, the balance rotation line 40 is formed on a
perpendicular line perpendicularly connecting the marking point of
the center of gravity and the joining line. When the marking point
of the center of gravity is positioned on the joining line of the
golf ball, the balance rotation line is formed perpendicular to the
joining line, and when the marking point of the center of gravity
is positioned on a pole of the golf ball, an arbitrary line among
countless lines perpendicular to the joining line is selected to
form the balance rotation line 40 thereon.
[0050] Here, since the balance rotation line 40 is formed
perpendicular to the joining line 30, a moving direction of the
golf ball desired by a golfer is disposed to match the balance
rotation line 40 when hitting the golf ball. Thus, the golf ball
rotates along the balance rotation line 40 when airborne or
rolling, thereby contributing to improved driving distance and
accurate putting.
[0051] The above description exemplarily describes the present
invention and one skilled in the art may understand that the
present invention can be variously modified without changing the
essential features of the present invention. Therefore, the
embodiments and accompanying drawings disclosed herein are for the
purpose of describing the technical sprit of the present invention
only and the scope of the technical sprit is not intended to be
limited by the embodiments and accompanying drawings. The scope of
the present invention should be defined by the appended claims, and
all technical concepts equivalent to the foregoing should be
interpreted to be included within the scope of the present
invention.
INDUSTRIAL APPLICABILITY
[0052] According to the embodiment of the present invention, since
a balance rotation line is formed on an arbitrary line which
perpendicularly connects a marking point of the center of gravity
of the golf ball and a joining line of the golf ball, a moving
direction of the golf ball desired by a golfer matches the balance
rotation line after hitting the golf ball, and thus, the number of
slices or hooks are decreased when driver or iron shots are
performed, and a straight directivity by rotation and a driving
distance can also be effectively secured.
* * * * *