US3804072A

US3804072A - Combination of archery bow with single or plural stabilizers

Info

Publication number: US3804072A
Application number: US00115996A
Authority: US
Inventors: T Izuta
Original assignee: Nippon Gakki Co Ltd
Current assignee: Nippon Gakki Co Ltd
Priority date: 1970-02-21
Filing date: 1971-02-17
Publication date: 1974-04-16
Anticipated expiration: 1991-04-16

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.

Description

United States Patent 1191 Izuta 1 COMBINATION OF ARCHERY BOW WITH SINGLE 0R PLURAL STABILIZERS [75] Inventor: Tadao Izuta, l-Iamamatsu, Japan [73] Assignee: Nippon Gakki Seizo Kabushiki Kaisha, Shizuoka-ken,'Japan 22 Filed: Feb. 17, 1971 21 Appl. No.: 115,996

[30] Foreign Application Priority Data Feb. 21, 1970 Japan 45-14620 52 us. Cl. 124/24 R, 124/30 R [51] Int. Cl. F41b 5/00 [58] Field of Search 124/23, 24, 30 R, 25, 22

[56] I References Cited 1 UNITED STATES PATENTS 3,342,172 9/1967 Sanders 124/30 R X B3,l96,860 7/1965 Hoyt 124/24 Primary Examiner-Richard C. Pinkham Assistant Examiner-William R. Browne Attorney, Agent, or FirmOstrolenk, Faber, Gerb &

Soffen Apr. 16, 1974 [57] 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.

9 Claims, 3 Drawing Figures PATENTEDAPR m4 3.804.072

' SHEET 1 0F 3 FIG.]

INVENTOR 7770,40 /ZJ774 PATENTEDAPR 16 m4 SHEET 3 BF 3 FIG.3

ATTORNEY? COMBINATION OF ARCHERY BOW WITH SINGLE OR PLURAL STABILIZERS 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 archers 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

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. r 1

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 por-,

tion 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 horizon tally 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 l 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 l of the archery bow, for instance, by its screw threaded portion. I

Furthermore, in this embodiment, the stabilizer 4 is attached to the handle-riser l in such a mannerthat the axial line C C of the rod member=6 of thestabilizer 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. 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 forwardand-afterward direction, the stabilizer 4 can be thereby vibrated for absorbing the vibration or shock of the handle-riser l and reducing the same. Furthermore, because the weight body 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 l 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 at tached 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 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 forwardand-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-andafterward 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 rightand-left direction can be absorbed more effectively, and an archery bow further stabilized and will not generate a string vibrating sound.

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 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 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.

* III t

Claims

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* 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* to the longitudinal axis of said handle section.