U.S. patent application number 11/371695 was filed with the patent office on 2006-09-14 for bow sight precision angle adjustment mounting bracket.
Invention is credited to Eugene Roy Lueck.
Application Number | 20060201005 11/371695 |
Document ID | / |
Family ID | 36969265 |
Filed Date | 2006-09-14 |
United States Patent
Application |
20060201005 |
Kind Code |
A1 |
Lueck; Eugene Roy |
September 14, 2006 |
Bow sight precision angle adjustment mounting bracket
Abstract
A precision adjustable pivot mounting bracket is attached
between an archery bow sight assembly and a riser of the bow. A
small screw with closely spaced threads threaded through a plate on
one side of a pivot contacting a bearing in the plate on the other
side of the pivot. It makes small incremental changes in the
horizontal angle between the bow sight assembly and the bow riser
to align the bow sight with the actual trajectory of the arrow. A
larger screw threaded through both plates locks in the changes in
angle.
Inventors: |
Lueck; Eugene Roy; (Albany,
OR) |
Correspondence
Address: |
Donald W. Meeker
924 East Ocean Front #E
Newport Beach
CA
92661
US
|
Family ID: |
36969265 |
Appl. No.: |
11/371695 |
Filed: |
March 8, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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60659333 |
Mar 8, 2005 |
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Current U.S.
Class: |
33/265 |
Current CPC
Class: |
F41G 1/467 20130101 |
Class at
Publication: |
033/265 |
International
Class: |
F41G 1/467 20060101
F41G001/467 |
Claims
1. An adjustable archery bow sight attachment device comprising: a
vertical plate attached to a riser of an archery bow, the vertical
plate having openings therethrough arranged to match a set of
openings in the riser of the archery bow where a bow sight is
attachable; a vertical pivot joint connected to the vertical plate
and connected to an archery bow sight assembly; a means for
pivoting the archery bow sight assembly in its entirety around the
vertical pivot joint in small increments to change the horizontal
angle between the archery bow sight assembly and the vertical plate
and the riser of the archery bow to adjust the horizontal angle in
small increments in conjunction with testing the trajectory of
arrows shot from the archery bow after each incremental adjustment
for improving the accuracy of the arrow trajectory to correct for
side to side deviation of the actual path of an arrow shot from the
archery bow from the intended path of the arrow by using the
archery bow sight, the side to side deviation caused by the actual
release and dynamic movement of an archery bow string to launch an
arrow.
2. The device of claim 1 wherein the means for pivoting the archery
bow sight assembly around the vertical pivot joint in small
increments comprises a first threaded shaft extending from a
threaded opening in the archery bow sight assembly to a ball
bearing rotatably attached within an opening in the vertical plate,
the first threaded shaft having threads spaced to allow small
incremental changes in the horizontal angle with partial turns of
the first threaded shaft, and a second threaded shaft extending
from a threaded opening in the archery bow sight assembly to a
threaded opening in the vertical plate, the second threaded shaft
locking the horizontal angle set by the first threaded shaft.
3. The device of claim 1 further comprising a pivot connector plate
attached to the pivot pin and attached to an archery bow sight
connector.
4. The device of claim 1 wherein the vertical plate and the
vertical pivot point are built into a back end of the archery bow
sight assembly where the bow sight assembly attaches to the archery
bow.
5. An adjustable archery bow sight attachment device comprising: a
compound plate pivot base comprising a vertical first plate
attached to a riser of an archery bow, the first plate having
openings therethrough arranged to match a set of openings in the
riser of the archery bow where an archery bow sight is normally
attachable by threaded fasteners, a second vertical plate rigidly
attached to the first vertical plate, the second plate offset from
the first plate by an interconnecting offset segment extending
perpendicularly from a forward vertical edge of the first plate to
a rearward vertical edge of the second plate, the second plate
having a pair of horizontal threaded openings therethrough, and the
offset segment having a vertical cylindrical opening therethrough;
a pivot connector plate pivotally attached to the compound plate
hinge base by a pivot pin through the vertical cylindrical pivot
pin opening forming a vertical pivot joint, the pivot connector
plate comprising a top spaced tab and a bottom spaced tab each
having a pivot pin receiving opening therethrough to receive the
pivot pin therein, the pivot connector plate attached to a rearward
end of an archery bow sight assembly, and a ball bearing rotatably
positioned on an inside face of the pivot connector plate opposite
one of the pair of threaded horizontal openings through the second
plate; and a means for pivoting the pivot connector plate and the
attached archery bow sight assembly around the vertical pivot joint
in small increments comprises a first threaded shaft extending from
one of the two threaded openings in the second plate to the ball
bearing rotatably attached within an opening in the pivot connector
plate, the first threaded shaft having threads spaced to allow
small incremental changes in the horizontal angle with partial
turns of the first threaded shaft, and a second threaded shaft
extending from a second of the threaded openings in the second
plate to a threaded opening in the pivot connector plate to lock
the horizontal angle set by the first threaded shaft.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional
Patent Application No. 60/659,333, filed on Mar. 8, 2005.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not Applicable.
THE NAMES OF THE PARTIES TO A JOINT RESEARCH OR DEVELOPMENT
[0003] Not Applicable.
BACKGROUND OF THE INVENTION
[0004] 1. Field of the Invention
[0005] The present invention generally relates to archery equipment
and in particular to a precision angle adjustment mounting bracket
for attaching a bow sight to a bow for fine incremental adjustment
of the right-left angle of attachment of a bow site to a bow to
correct for deviance of an arrow flight caused by forces created
from the release of the bow string after normal aiming with the bow
sight to enhance the ability of an archer to tune his bow sight to
the path of the shot arrow.
[0006] 2. Description of Related Art Including Information
Disclosed Under 37 CFR 1.97 and 1.98
[0007] After an arrow has been aimed precisely using a high
precision sight mounted on a bow, forces may be created from the
dynamics of the string release, particularly the side-slip of the
string off the fingers of the archer, as well as any structural
idiosyncrasies of the bow or its use which cause variance in the
flight of the arrow from the intended flight guided by the sight.
Side slip of the arrow to one side of an intended target may occur
and be grouping of a series of arrows in a target to the right or
left of the point aimed at by the archer. Up to now, correction of
this problem has been done by archaic methods using shims which
take a lot of time to correct the problem with any precision or
moving the arrow path or bending the bow sight. None of these
attempts to correct the problem are very accurate or desirable.
[0008] Current bow sights do not have the capability to adjust
alignment to the path of the shot arrow by pivoting horizontally at
the sight mount. Virtually all of the bow sights on the market
today only have adjustments at the outer end of the sight
extension. None of these adjustments will align the bow sight to
the path of the shot arrow accurately.
[0009] The problem and subject of many discussions is how do you
set the sight 3rd axis (the angle around the vertical at the outer
end of the sight)? At full draw or with the sight off the bow or
with at the strung but un-drawn position? None of these questions
are the correct question! It really doesn't matter!
[0010] The fact is that there is a tremendous need to set the 4th
axis (the horizontal angle around the vertical at the point of
attachment of the sight to the bow) by shooting the bow. This
cannot be done at full draw, brace height, or off the bow. Because
of slight machining differences, handle torque, personal torque,
hand position, limb twist and many other factors, the only way to
set the 4th axis is to shoot the arrow and see where it impacts
with the extension fully extended and also with it fully retracted
to the bow. If the arrow does not impact in perfect line the 4th
axis is not set correctly. Even if the bow is torqued badly, the
bow takes its own position upon the instant of release. It is under
large amounts of torque until the string is released. It
immediately adjusts to its own normal method of closing because the
archer only has hold of the grip at that time and the torque is no
longer a factor other that it has flipped the arrow. The string
then proceeds to brace height on an unrestricted path. This
happening can cause an effect on where the arrow will hit. If the
3rd axis and 2nd axis are set properly, and the 4th axis is
ignored, the sight bubble is likely to be out of square and cause
left or right arrow impacts when shooting in up or down hill. Think
about it in this manner. Take your sight off your bow and get an
arrow. Then point the arrow straight away from you and with the
sight held against the arrow in front with the back of the
extension about a 20 degrees away from the arrow. Try to keep the
sight bar plumb. Now point the arrow down hill and you will see
that you will have to cant the sight extension keep the bubble in
the middle. If you have three arms or maybe a buddy to check the
sight bar you will see that it is not plumb any more. This is a bad
thing! This out of line condition will cost you a point here and
there when shooting in the hills.
[0011] An archer must be able to make the adjustment around the
fourth axis in finite amounts. This is the key to absolute vertical
accuracy when shooting an arrow up or down hill and even long
yardages such as 100 yards.
[0012] What is needed is a precision adjustable sight mounting
bracket for attaching the sight to the bow to allow adjustment of
the right/left angle of the sight at the point where the sight
connects to the bow by changing the setting in small increments
until the arrows group in the center of the target matching the aim
of the sight so that the Sight extension is parallel to the path of
the arrow.
BRIEF SUMMARY OF THE INVENTION
[0013] An object of the present invention is to provide a precision
adjustable sight mounting bracket for attaching the sight to the
bow to allow adjustment of the horizontal (right/left) angle of the
sight at the point where the sight connects to the bow by changing
the setting in small increments until the arrows group in the
center of the target matching the aim of the sight so that the
sight extension is parallel to the path of the arrow.
[0014] A related object of the present invention is to provide a
sight mounting bracket capable of making precision adjustments in
small increments of the horizontal (left/right) angle of the bow
sight relative to the bow at the point of connection to the bow
with a screw on one face of a tight vertical hinge contacting a
ball bearing in an opposing face of the vertical hinge adjusted to
pivot the vertical hinge in small finite amounts and an adjacent
screw threaded between the two opposing faces to lock the
adjustment in place so that small incremental adjustments can be
made by locking an adjustment in place and testing the accuracy of
the adjustment by shooting a subsequent group of arrows to note the
amount of divergence from the intended target and repeating the
procedure until the precise flight path of the arrows is achieve
relative to the intended target as sighted. An archer must be able
to make this adjustment in finite amounts. This is the key to
absolute vertical accuracy when shooting an arrow up or down hill
and even long yardages such as 100 yards.
[0015] The prior art fails to enable fine-tuning of the 4th axis.
Prior sight mounts only mount flat to the bow riser and have no
horizontal adjustability. The present invention enables an archer
to adjust a sight extension to be aligned exactly parallel with the
path of the arrow when shot. This is absolutely necessary to assure
shooting down the center.
[0016] In brief, the present invention enables a tremendous
improvement in the ability to accurately change relationship of an
attached bow sight to the path of the arrow. To define an arrow, it
would be any type that is propelled by a hand drawn archery bow. To
define a bow sight, it would be any device attached to an archery
bow to enable the user to align a scope or pin on a target to hit
it consistently. To define a bow riser it is the handle or the part
of an archery bow located in the center and providing the place to
grip the bow and attach various accessories, such as sights,
quivers etc.
[0017] The inability to make proper adjustments to the shot arrow
path can be overcome by the present invention. There are many
tuning methods used to enhance the accuracy of an archer's
equipment. (Bow and Arrow) Most of them include shooting the arrow.
To date this has not been done when aligning the bow sight level
bubble perpendicular to the path of the shot arrow. Typically, most
bows, when set up for proper arrow flight and grouping, the arrow
path will not be aligned with the centerline of the handle riser.
This creates the need for this invention. With the addition of this
invention to a bow, an archer will have the ability to fine-tune
the level bubble on his bow sight to be perpendicular to the path
of the shot arrow. This invention, when mounted on a bow, enables
the shooter to set the bow sight on level ground with the level
bubble centered. Then, in order to check the perpendicularity of
that level bubble to the arrow path the archer must shoot an arrow
at a down hill target. If the shot does not impact perfectly
vertically aligned with the dead center of the target, it is
necessary to adjust for that error. The adjustment screws on this
invention will enable the archer to accomplish this in a very
precise manner. In many instances a movement of less than 0.005''
is necessary to impact dead center. Once this function is done the
final part of tuning a bow sight to the arrow path is complete.
[0018] The present invention will enhance the accuracy of an
archery bow by enabling fine-tuning of the 4th axis. The prior art
fails to enable this function. Prior sight mounts only mount flat
to the bow riser and have no horizontal adjustability. The
adjustable bow sight mounting bracket of the present invention will
attach to the bow riser and enable the archer to attach their bow
sight to it or it will be built into the bow sight and used for
attachment of the bow sight to the bow riser. With the present
invention in place the archer will be able to fine adjust the
entire sight extension and vertical bar parallel to the arrow path
based on shooting the bow. This is imperative for the ultimate in
accuracy. Because of inherent and induced torque to the bow riser,
this is the only method whereby the true arrow path can be
determined. This degree of parallelism has not been easily or
accurately attainable to date.
[0019] The present invention will be machined from aluminum and
have steel adjustment screws. By tightening or loosening these
screws a person will be able to infinitely alter the relationship
of the bow sight to the arrow. The present invention will enable
the user to test the equipment to assure parallelism. This is
accomplished by sliding the bow sight back against the bow and
shooting an arrow at a vertical line on a target at approximately
30 yards. Then slide the bow sight fully extended and shoot another
arrow at the vertical line. If both arrows do not impact on the
same vertical line, the 4th axis in incorrect. At this point an
archer must adjust the screws in one direction or the other to
correct the error. If a right-handed archer hits to the left of the
line with the bow sight fully extended an adjustment to the present
invention must be adjusted to the left. Then repeat the test. Once
the impact is on the same vertical line the present invention is
set correctly.
[0020] The present invention attaches to an archery bow at the
sight mount holes. Once this is done a bow sight is attached to the
present invention. At this point the present invention will allow
the entire bow sight to be pivoted horizontally in finite amounts.
No other method will properly accurately adjust the 4th axis.
[0021] A primary advantage of the present invention is that it
provides a precision adjustable mounting bracket for attaching the
sight to the bow that enables an archer to adjust a sight extension
to be aligned with the path of the arrow when shot which is
absolutely necessary to assure shooting down the center.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0022] These and other details of my invention will be described in
connection with the accompanying drawings, which are furnished only
by way of illustration and not in limitation of the invention, and
in which drawings:
[0023] FIG. 1 is a partial elevational view showing the right side
of a bow handle (riser) with the present invention attached on a
right handed bow;
[0024] FIG. 2 is a partial elevational view showing the left side
of the bow handle (riser) of FIG. 1 with the present invention
attached on a right handed bow;
[0025] FIG. 3 is a partial elevational view showing the right side
of a bow handle (riser) with the present invention attached on a
right handed bow and the bow sight attached to the present
invention by the bow sight mount;
[0026] FIG. 4 is a partial sectional view taken through A-A of FIG.
3 showing the bow sight (including the bow sight level bubble)
mounted on the present invention of FIGS. 1 and 3 and showing the
adjustment screws of the invention including the ball bearing
contacting one of the adjustment screws and showing (in dashed
lines) the center line of the bow handle (riser) and the path of
the shot arrow;
[0027] FIG. 5A is a partial sectional view taken through A-A of
FIG. 5B showing an alternative embodiment of the invention with the
bow sight precision angle adjustment mounting bracket of the
invention built into a rearward end of the bow sight;
[0028] FIG. 5B is a partial elevational view of the alternative
embodiment of the invention of FIG. 5A showing the adjusting
screws;
[0029] FIG. 6 is a perspective view of the bow sight mounted on the
present invention of FIG. 1 showing the four axes.
DETAILED DESCRIPTION OF THE INVENTION
[0030] In FIGS. 1-6, an adjustable bow sight attachment device 30
and 30A comprises a pivotable mounting bracket for attaching a bow
sight to a bow riser to allow incremental pivoting of the bow sight
relative to the riser to enable precise alignment of the bow sight
to be parallel to the actual flight path of the arrow. The
preferred embodiment of FIGS. 1-4 and 6 comprises a separate two
piece adjustable mounting bracket which attaches to the archery bow
riser and to the bow sight.
[0031] In FIGS. 1-4 and 6, a compound plate pivot base comprises a
vertical plate 31 of the preferred embodiment of the invention
which attaches to a riser 1 of an archery bow. The vertical plate
31 has a first pair of vertically spaced horizontal openings 2
therethrough arranged to match a set of openings in the riser of
the bow where a bow sight is normally attachable. A second pair of
mating vertically spaced horizontal openings 3, shown in FIG. 1,
allow for mounting the invention further back toward the archer if
desired.
[0032] A second plate 36 of the compound plate pivot base, shown in
FIGS. 2, 4 and 6 is offset from the first plate by an
interconnecting offset segment 33 extending perpendicularly from a
forward vertical edge of the first plate 31 to a rearward vertical
edge of the second plate 36. The second plate 36 has a pair of
horizontal threaded openings 10 therethrough, and the offset
segment 33 has a vertical cylindrical opening therethrough to
receive a pivot pin 35, as shown in FIG. 4.
[0033] A pivot connector plate 32 is pivotally attached to the
compound plate pivot base by a pivot pin 35 through the vertical
cylindrical pivot pin opening forming a vertical pivot joint as the
primary component of the offset segment 33. The pivot connector
plate 32 comprises a top and a bottom spaced tab 34 each having a
pivot pin receiving opening therethrough to receive the pivot pin
35 therein. The pivot connector plate 32 is attached to a rearward
end of a bow sight assembly to the bow sight mount 11. In FIG. 4, a
ball bearing 18 is rotatably positioned on an inside face of the
pivot connector plate 32 opposite one of the pair of threaded
horizontal openings 10 through the second plate.
[0034] A means for pivoting the pivot connector plate 32 and the
attached bow sight assembly in its entirety around the vertical
pivot joint in small increments comprises a first threaded shaft
extending from one of the two threaded openings 10 in the second
plate 36 to the ball bearing 18 rotatably attached within an
opening in the pivot connector plate 32. The first threaded shaft
having threads very closely spaced to allow small incremental
changes in the horizontal angle with partial turns of the first
threaded shaft to adjust the horizontal angle between the center
line 19 of the bow handle and the path 20 of the shot arrow. A
second threaded shaft extends from a second larger one of the
threaded openings 10 in the second plate 36 to a threaded opening
in the pivot connector plate 32 to lock the horizontal angle set by
the first threaded shaft.
[0035] In an alternate embodiment of FIGS. 5A and 5B, a vertical
plate 31A of the invention attaches to a riser 1 of an archery bow.
The vertical plate 31 has a first pair of vertically spaced
horizontal openings therethrough arranged to match a set of
openings in the riser of the bow where a bow sight is normally
attachable.
[0036] A vertical pivot joint 33A connects to the vertical plate
31A and connects directly to the bow sight mount 11 of the bow
sight assembly, as shown in FIG. 5A.
[0037] A similar means is used in this embodiment for pivoting the
bow sight assembly around the vertical pivot joint in small
increments to change the horizontal angle between the bow sight
assembly and the vertical plate and the riser of the bow to adjust
the horizontal angle in small increments in conjunction with
testing the trajectory of arrows shot from the bow after each
incremental adjustment for improving the accuracy of the arrow
trajectory to correct for side to side deviation of the actual path
of an arrow shot from the bow from the intended path of the arrow
by using the bow sight, the side to side deviation caused by the
actual release and dynamic movement of a bow string to launch an
arrow.
[0038] The means for pivoting the bow sight assembly around the
vertical pivot joint in small increments comprises a first threaded
shaft extending from a smaller one of the threaded openings 10 in
the bow sight mount 11 to a ball bearing 18 rotatably attached
within an opening in the vertical plate 31A. The first threaded
shaft has threads very closely spaced to allow small incremental
changes in the horizontal angle with partial turns of the first
threaded shaft. A second threaded shaft extends from the larger of
the two threaded openings 10 in the bow sight mount 11 to a
threaded opening in the vertical plate 31A, the second threaded
shaft locking the horizontal angle set by the first threaded
shaft.
[0039] The present invention is preferably fabricated of machined
aluminum with steel adjustment screws.
[0040] In use, for bow sights that do not have a 3rd axis
adjustment which are machined square and so the 3rd axis is
probably close to perfect, the bow sight is removed, the present
invention attached to the bow in place of the bow sight and the
sight attached to the present invention. Then the 3rd and 4th axis
to the arrow path are adjusted by shooting the bow. The windage is
set at 20 yards on a flat range. Then find on a steep up or down
hill target a group of arrows is shot at a target. If that group is
not dead center, the 4th axis needs adjustment. When aiming down
hill, move the front of the sight a very small amount away from the
center of the group and towards center of the target. Re-set The
windage re-set and another group shot first on the flat 20 and then
the steep downhill.
[0041] It is understood that the preceding description is given
merely by way of illustration and not in limitation of the
invention and that various modifications may be made thereto
without departing from the spirit of the invention as claimed.
* * * * *