U.S. patent application number 11/206337 was filed with the patent office on 2007-02-22 for center-of-gravity shafted golf putter and method of making same.
This patent application is currently assigned to Karsten Manufacturing Corporation. Invention is credited to Derek W. Haines, David D. Jones.
Application Number | 20070042831 11/206337 |
Document ID | / |
Family ID | 37767948 |
Filed Date | 2007-02-22 |
United States Patent
Application |
20070042831 |
Kind Code |
A1 |
Haines; Derek W. ; et
al. |
February 22, 2007 |
Center-of-gravity shafted golf putter and method of making same
Abstract
A golf putter has a club head body coupled to a shaft such that
one end of the shaft is substantially coincident with the center of
gravity--in three axes--of the club head body. The shaft may be
rigidly coupled to the shaft via a hosel. Further, the club head
body may comprise at least two materials: one material (e.g.,
aluminum) for a front portion of the club head body, and another
material (e.g., tungsten) for a back portion of the club head
body.
Inventors: |
Haines; Derek W.;
(Beaverton, OR) ; Jones; David D.; (Glendale,
AZ) |
Correspondence
Address: |
KARSTEN MANUFACTURING CORPORATION
LEGAL DEPARTMENT
2201 WEST DESERT COVE
PHOENIX
AZ
85029
US
|
Assignee: |
Karsten Manufacturing
Corporation
Phoenix
AZ
|
Family ID: |
37767948 |
Appl. No.: |
11/206337 |
Filed: |
August 17, 2005 |
Current U.S.
Class: |
473/313 ;
473/340 |
Current CPC
Class: |
A63B 53/0487 20130101;
A63B 2209/00 20130101; A63B 53/02 20130101; A63B 60/00 20151001;
A63B 53/047 20130101 |
Class at
Publication: |
473/313 ;
473/340 |
International
Class: |
A63B 53/02 20060101
A63B053/02; A63B 53/00 20060101 A63B053/00 |
Claims
1. A golf putter comprising: a club head including a body with a
center of gravity, said body having a front face, a heel region and
a toe region; a shaft having a terminus, wherein said shaft being
coupled to said club head body so that said terminus is
substantially coincident with said center of gravity of said club
head body.
2. The golf putter of claim 1, wherein said shaft is rigidly
coupled to said club head body via a hosel that extends outwardly
from said club head body.
3. The golf putter of claim 1, wherein said club head body
comprises a first material and a second material.
4. The golf putter of claim 3, wherein said club head body has a
front portion and a back portion, and wherein said front portion
comprises said first material, and said back portion comprises said
second material.
5. The golf putter of claim 4, wherein said first material is less
dense than said second material.
6. The golf putter of claim 5, wherein said first material is
aluminum, and said second material is tungsten.
7. A method of making a golf putter comprising: forming a club head
body; computing the center of gravity of said club head body;
providing a shaft having a terminus, securing said shaft to said
club head body so that said shaft terminus is substantially
coincident with said center of gravity of said club head body.
8. The method of claim 7, wherein said forming step includes
forming the club head body of at least two materials.
9. The method of claim 8, wherein said forming step further
includes forming the club head body with a first portion made of
one material and a second portion made of another material.
Description
BACKGROUND OF THE INVENTION
[0001] This invention relates generally to golf equipment and, in
particular, to a golf putter having its shaft terminating at the
center of gravity of its club head.
[0002] The position of the putter club head with respect to the
position and length of the shaft greatly affects the balance and
"feel" of the putter. When the face of the club head is brought
into contact with a golf ball, the kinematic behavior of the club
head is to a large extent dependent upon the position of the center
of gravity of the club head body with respect to the axis of the
shaft. Prior art golf club heads have incorporated some form of
balancing with respect to this center of gravity. U.S. Pat. No.
4,010,958, issued to Long, discloses a club head where the shaft
axis is at or adjacent to the center of mass of the club head to
reduce twisting of the club head along a single axis (i.e., a
vertically oriented axis corresponding to an "upright" member
configured to accept the shaft). Long does not disclose, however,
the position of the endpoint of the shaft with respect to the
center of gravity of the club head. That is, while some prior art
club heads have been designed to optimize weight distribution and
minimize twisting, none have been designed with a full appreciation
of the role that center of gravity plays in all three club head
dimensions.
SUMMARY OF THE INVENTION
[0003] The present invention provides a golf putter having a club
head body coupled to a shaft such that one end of the shaft is
substantially coincident with the center of gravity--in three
axes--of the club head body. In accordance with one embodiment of
the present invention, the shaft is rigidly coupled to the club
head body via a hosel. In accordance with another embodiment, the
club head body comprises at least two materials: one material
(e.g., aluminum) for the face and front region of the club head
body, and another material (e.g., tungsten) for the back region of
the club head body.
DESCRIPTION OF THE DRAWINGS
[0004] FIGS. 1A, 1B and 1C are side, front, and top views,
respectively, of a golf putter according to one embodiment of the
present invention;
[0005] FIG. 2 is a perspective view of the golf putter shown in
FIGS. 1A, 1B and 1C; and
[0006] FIG. 3 is a top view of an alternative golf putter; and
[0007] FIG. 4 is a side view of a golf putter according to another
embodiment of the present invention.
DESCRIPTION OF THE INVENTION
[0008] The present invention provides a golf putter having a club
head body coupled to a shaft such that one end of the shaft is
substantially coincident with the center of gravity--in three
axes--of the club head body.
[0009] FIGS. 1A, 1B, and 1C show side, front, and top views of a
putter club head in accordance with one embodiment of the present
invention, and FIG. 2 depicts perspective view of the same club
head. With reference to FIG. 2, a golf putter club head 100
includes a body 102 having a front face 112, a bottom surface or
"sole" 114, a heel region 106, and a toe region 104. Body 102 is
attached to a shaft 110 either directly (i.e., seated within a
generally cylindrical bore formed in body 102), or via a suitably
configured hosel 108 shown in FIG. 4 extending outwardly from body
102. Shaft 110 has a lower end 111 (or "terminus") which is
preferably positioned such that it is substantially coincident with
the center of gravity 130 of body 102 in all axes, as shown in
FIGS. 1A-1C. Therefore, the club head body 102 is
"multi-balanced."
[0010] In accordance with one embodiment of the present invention,
club head body 102 comprises a single material (e.g., aluminum,
steel, titanium, etc.). In an alternate embodiment, body 102
comprises at least two materials. As shown in FIG. 3, body 102 may
include a front portion 304 made of one material (e.g., aluminum),
and a back portion 302 made of a second material (e.g.,
tungsten).
[0011] Referring again to FIG. 2, body 102 generally comprises any
suitable metal, plastic, composite material, or combination thereof
selected in accordance with various criteria as described in
further detail below. In accordance with one embodiment, for
example, body 102 comprises a metallic material having a relatively
high density, e.g., titanium or a high-purity titanium alloy (e.g.,
commercial grade 2 titanium) having a density of approximately 3.0
g/cm.sup.3 to 7.0 g/cm.sup.3.
[0012] Depending upon the selected material or materials, body 102
may be fabricated using any suitable process now known or later
developed, including a variety of conventional casting methods such
as investment-casting, powdered-metal processing, and/or metal
machining. In one embodiment, body 102 is formed via a suitable
casting process and thereafter milled to finish the various exposed
surfaces.
[0013] Body 102 is defined by any suitable club head shape
depending upon any number of factors, including, for example,
putter type, desired moment of inertia (e.g., the polar moment of
inertia around an axis normal to the club head sole), desired
center of gravity, desired aesthetic properties (e.g., visual cues
provided by the club head's contours as viewed from above during
play), and/or the desired weight, mass, and density. In this
regard, it will be appreciated that the exemplary club head shapes
depicted in FIGS. 1-3 are included for illustrative purposes only,
and that the present invention is not so limited.
[0014] Furthermore, shaft 110 may interface with body 102 in any
convenient manner. As shown in FIGS. 1A-1C, for example, shaft 110
may be simply inserted in a bore in body 102 such that terminus 111
is substantially coincident with center of gravity 130. In the
embodiment shown in FIG. 4, shaft 110 is inserted in the hosel
108.
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