U.S. patent number 3,804,072 [Application Number 05/115,996] was granted by the patent office on 1974-04-16 for combination of archery bow with single or plural stabilizers.
This patent grant is currently assigned to Nippon Gakki Seizo Kabushiki Kaisha. Invention is credited to Tadao Izuta.
United States Patent |
3,804,072 |
Izuta |
April 16, 1974 |
COMBINATION OF ARCHERY BOW WITH SINGLE OR PLURAL STABILIZERS
Abstract
An archery bow with: a handle section, a hand portion and at
least one stabilizer made up of a weight body and a rod member
connected together. The stabilizer is attached to the front or
belly side of the handle section and extends obliquely downwardly
with respect to the longitudinal axis of the handle section in such
a manner that the axial line of the rod member of the stabilizer is
directed to the grip portion with the weight body disposed near the
end of the stabilizer. The bow may have a second stabilizer
attached to the handle section and extending out of the back side
of the handle section perpendicular to the longitudinal axis
thereof. The bow may also have another pair of stabilizers attached
to the front or belly side of the handle section and each extending
obliquely away from the longitudinal axis of the handle section and
being symmetrically positioned with respect to a line perpendicular
to the longitudinal axis of the handle section.
Inventors: |
Izuta; Tadao (Hamamatsu,
JA) |
Assignee: |
Nippon Gakki Seizo Kabushiki
Kaisha (Shizuoka-ken, JA)
|
Family
ID: |
11866234 |
Appl.
No.: |
05/115,996 |
Filed: |
February 17, 1971 |
Foreign Application Priority Data
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Feb 21, 1970 [JA] |
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45-14620 |
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Current U.S.
Class: |
124/89 |
Current CPC
Class: |
F41B
5/1426 (20130101) |
Current International
Class: |
F41B
5/00 (20060101); F41B 5/20 (20060101); F41b
005/00 () |
Field of
Search: |
;124/23,24,3R,25,22 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Browne; William R.
Attorney, Agent or Firm: Ostrolenk, Faber, Gerb &
Soffen
Claims
What is claimed is:
1. An archery bow having a handle section, the center of gravity of
the bow in the handle section, said handle section being provided
with a hand grip portion, said bow having only one stabilizer
wherein said only stabilizer comprises a single weight body and a
rod member rigidly connected together in an integral manner, said
handle section having front (belly) and back sides, said stabilizer
rod member being attached rigidly and nonadjustably to said front
side of said handle section and extending obliquely and downwardly
with respect to the longitudinal axis of said handle section, the
center line of said rod member being directed toward said hand grip
portion and passing through the center of gravity of said bow.
2. An archery bow as claimed in claim 1 further comprising a second
stabilizer having a weight body and a rod member, said second
stabilizer rod member being attached to said back side of said
handle section and extending perpendicularly to the longitudinal
axis of said handle section.
3. An archery bow as claimed in claim 2 further comprising a pair
of third stabilizers each having a weight body and a rod member,
said rod members of said pair of third stabilizers being attached,
respectively, to said front side of said handle section at upper
and lower positions thereof and extending away from said handle
section in an oblique manner with respect to the longitinal axis of
said handle section.
4. An archery bow as claimed in claim 3 wherein said stabilizer of
said pair of third stabilizers are disposed symmetrically with
respect to a line perpendicular to the longitudianl axis of said
handle section.
5. An archery bow as claimed in claim 1 further comprising a pair
of second stabilizers each having a weight body and a rod member,
said rod members of said pair of second stabilizers being attached,
respectively, to said front side of said handle section at upper
and lower positions thereof and extending away from said handle
section in an oblique manner with respect to the longitudinal axis
of said handle section.
6. An archery bow as claimed in claim 5 wherein said stabilizers of
said pair of second stabilizers are disposed symmetrically with
respect to a line perpendicular to the longitudinal axis of said
handle section.
7. An archery bow as claimed in claim 6 wherein each stabilizer of
said pair of second stabilizers is disposed at an angle of about
25.degree. to a line perpendicular to the longitudinal axis of said
handle section.
8. An archery bow as caimed in claim 1 wherein said stabilizer is
disposed at an angle of about 35.degree. to the longitudinal axis
of said handle section.
9. An archery bow having a longitudinal and a lateral axis and
having a handle section provided with a hand grip portion, said
handle section having front (belly) and back sides, said bow having
three stabilizers each comprising a weight body and a rod member,
one of said stabilizers being attached to said back side of said
handle section and extending perpendicularly to the longitudinal
axis of said handle section, the remaining two of said stabilizers
being rigidly and non-adjustably attached symmetrically to said
front side of said handle section at upper and lower positions
thereof and having center lines extending away from said handle
section in an oblique manner with respect to the longitudinal axis
of said handle section and the axes of said remaining stabilizers
intersecting at said bow lateral axis and beyond said back side of
said bow.
Description
BACKGROUND OF THE INVENTION
This invention relates to an archery bow provided with one or more
stabilizers on its handle section.
When an arrow is notched on a bow and fully drawn, a vibration of
small amplitude but of high pitch is caused in the bow because of
the archer's highly tensioned muscles. When the arrow is released,
vibration or shock of greater intensity is caused in the bow
because of quick recovery of the limb portions and the string of
the archery bow to their original positions.
A stabilizer for an archery bow is employed for absorbing these
vibrations or shock, and also for compensating any unbalance in the
inertia moments which might exist around the hand grip portion of
the archery bow especially in the right-and-left directions.
Research has been carried out on the attaching positions for the
stabilizer around the handle-riser or handle section and one part
of the findings have been utilized. However, in most cases, the
stabilizers are attached to the archery bow in such a manner that
the vibrating rod of the stabilizer is perpendicular to the
longitudinal axis of the bow. As is well known, the vibrations in
the archery bow are of different types after the arrow in released,
and the vibration caused at the instant the arrow is released is in
itself not so simple, and contains vibrational components in
various directions. The stabilizer having one end of its vibrating
rod fixed on the handle-riser of the archery bow vibrates in a
direction along a circle with its center at the fixed position of
the end, and the stabilizer cannot absorb any shock or vibration
along the axial direction of the vibrating rod.
Accordingly, the archery bow having a stabilizer perpendicularly
attached to the handle-riser can absorb vibration in up-and-down
direction or in right-and-left or side-to side direction, but it
cannot absorb vibration or shock in the forward-and backward
direction.
SUMMARY OF THE INVENTION
Therefore, a primary object of the present invention is to provide
an archery bow on which one or more stabilizers are attached in
such a manner that they can absorb vibrations or shocks in
practically all directions which might be caused in the archery
bow.
Another object of the present invention is to provide an archery
bow which has a center of gravity near the hand grip portion
despite the stabilizer having a weight body, and thereby the bow
exhibits excellent stability.
Still another object of the present invention is to provide an
archery bow which is provided with a plurality of stabilizers
without causing any obstacle to the operation of the bow.
According to the present invention, in one aspect thereof, the
above described and other objects of the invention can be achieved
by an archery bow wherein a stabilizer comprising a rod portion and
a weight portion is inclinedly attached to the front side of the
handle-riser so that the axial line of the rod portion is directed
to the hand grip and the weight portion is located at the lower end
of the rod portion.
In another aspect of the invention, the objects of the invention
can be achieved by an archery bow wherein a stabilizer comprising a
rod portion and a weight portion is inclinedly attached to the
front face of its handle-riser so that the axial line of the rod
portion is directed to the hand grip and the weight portion is
located at the lower end of the rod portion, while another
stabilizer of similar construction is attached horizontally on the
back side of the archery bow.
In still another aspect of the invention, the objects of the
invention can be achieved by an archery bow wherein a stabilizer
comprising a rod portion and a weight portion is inclinedly
attached to the front side of its handle-riser so that the axial
line of the rod portion is directed to the hand grip and the weight
portion is located at the lower end of the rod portion, while
another stabilizer of similar construction is attached horizontally
to the back side of the archery bow, and still another pair or
stabilizers are attached on the front or belly side inclinedly in
an up-and-down relationship.
The nature, principle, and utility of the invention will be more
clearly understood from the following detailed description when
read in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a profile view of an archery bow provided with a
stabilizer which constitutes a first embodiment of the present
invention;
FIG. 2 is a profile view of an archery bow provided with two
stabilizers which constitutes a second embodiment of the present
invention; and
FIG. 3 is a profile view of an archery bow provided with four
stabilizers which constitutes a third embodiment of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
In all of the attached drawings, there is indicated a handle-riser
or handle section 1 of a predetermined configuration having a hand
grip portion 2. In ordinary case, the center of gravity of the
handle-riser 1 or that of the bow is considered to be advantageous
when it is located at a central point a of the hand grip 2 where
the longitudinal central axis A -- A and lateral central axis B --
B of the hand grip 2 intersect, and the handle-riser of this
invention is also so fabricated.
In the embodiment of the invention shown in FIG. 1, a stabilizer 4
is provided on the front side 3 of the handle-riser 1 in an
inclined manner. Throughout this specification, the term "front
side" or belly means that side of the bow which faces the archer
when the bow is used, and the term "back side" means the opposite
side of the front side. More specifically, the stabilizer 4
comprising a weight body 5 and a rod member 6 connected together in
an integral manner is attached to the handle-riser 1 of the archery
bow, for instance, by its screw threaded portion.
Furthermore, in this embodiment, the stabilizer 4 is attached to
the handle-riser 1 in such a manner that the axial line C -- C of
the rod member 6 of the stabilizer 4 is directed to the above
described central point a of the grip 2 or the center of gravity of
the bow, intersecting with the longitudinal axis A -- A of the
handle-riser 1 at an angle of about 35.degree.. In other words, the
rod member 6 of the stabilizer 4 is disposed obliquely downwardly
from the handle-riser 1 so that the weight body 5 is located at the
lowermost end of the rod member 6.
Since the stabilizer 4 is attached obliquely to the front side 3 of
the handle-riser 1, when a vibration or shock is caused in the
handle-riser 1 in up-and-down direction, right-and-left direction,
or in the forward-and-afterward direction, the stabilizer 4 can be
thereby vibrated for absorbing the vibration or shock of the
handle-riser 1 and reducing the same. Furthermore, because the
weight body 5 is located downwardly, the existence of the
stabilizer below the hand grip 2 on the front side thereof does not
cause any obstacle in arrow shooting, and because the axial line C
-- C of the rod member 6 is directed to the central point a of the
grip 2 where the center of gravity of the archery bow is located,
the balance of the archery bow is not disturbed by the operation of
the stabilizer.
In another embodiment of the invention shown in FIG. 2, another
stabilizer 4a similar to that employed in the first embodiment of
the invention and having a weight body 5a and a rod member 6a
integrally connected with each other is attached horizontally on
the back side 7 of the handle-riser 1 at a position lower than the
grip 2. In this embodiment, since the stabilizer 4a is attached
perpedicularly to the longitudinal axis of the handle-riser 1 in
addition to the stabilizer 4 attached thereto obliquely, any
vibration in up-and-down direction, right-and-left direction, or a
combination thereof in the handle-riser 1 can be absorbed more
effectively.
In still another embodiment of the invention shown in FIG. 3, the
handle-riser 1 in accordance with the second embodiment shown in
FIG. 2 is further provided with two stabilizers 4b, 4b of similar
constructions at upper and lower positions respectively on the
front side of the handle-riser. The stabilizers 4b, 4b each
comprising a weight body 5b and a rod member 6b connected together
integrally are attached to the upper and lower positions of the
handle-riser in an oblique manner forming an angle of approximately
25.degree. to the horizontal axis B -- B, which is perpendicular to
the longitudinal axis A -- A, so that the balance of the
handle-riser 1 is maintained by the stabilizers 4b, 4b
symmetrically disposed with respect to the horizontal axis B --
B.
Since the two stabilizers 4b, 4b are provided symmetrically and
obliquely in the third embodiment of the invention beside of the
above described stabilizers 4 and 4a, the absorbing and reducing
effect of the forward-and-afterward directed vibration or shock can
be further improved. In some cases, the stabilizer 4 may be omitted
from the bow shown in FIG. 3 and only a combination of stabilizers
4a and 4b may be employed.
In all of the above described embodiments of the present invention,
one or more of stabilizers are obliquely provided on the front side
of the handle-riser for absorbing vibration or shock in the
forward-and-afterward direction of the archery bow whereby the
archery bow can be further stabilized and the vibration of the bow
can be further dampened. In another aspect, an additional
stabilizer is provided horizontally on the back side of the
handle-riser, whereby the vibration and shock in the up-and-down
direction and the right-and-left direction can be absorbed more
effectively, and an archery bow further stabilized and will not
generate a string vibrating sound.
* * * * *