U.S. patent application number 12/772460 was filed with the patent office on 2010-09-16 for removable foregrip with laser sight.
This patent application is currently assigned to LaserMax, Inc.. Invention is credited to Christopher Gagliano, Susan Houde-Walter, William R. Houde-Walter, Jeffrey Mock.
Application Number | 20100229448 12/772460 |
Document ID | / |
Family ID | 42729527 |
Filed Date | 2010-09-16 |
United States Patent
Application |
20100229448 |
Kind Code |
A1 |
Houde-Walter; Susan ; et
al. |
September 16, 2010 |
REMOVABLE FOREGRIP WITH LASER SIGHT
Abstract
A sight assembly removably attachable to a firearm includes a
foregrip, a quantum cascade laser disposed within the foregrip, and
a power source operably connected to the quantum cascade laser.
Inventors: |
Houde-Walter; Susan; (Rush,
NY) ; Mock; Jeffrey; (Rochester, NY) ;
Gagliano; Christopher; (Rochester, NY) ;
Houde-Walter; William R.; (Rush, NY) |
Correspondence
Address: |
Stephen B. Salai, Esq.;Harter Secrest & Emery LLP
1600 Bausch & Lomb Place
Rochester
NY
14604-2711
US
|
Assignee: |
LaserMax, Inc.
Rochester
NY
|
Family ID: |
42729527 |
Appl. No.: |
12/772460 |
Filed: |
May 3, 2010 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
12334111 |
Dec 12, 2008 |
|
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12772460 |
|
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|
|
61013906 |
Dec 14, 2007 |
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Current U.S.
Class: |
42/72 ; 42/114;
42/115 |
Current CPC
Class: |
F41C 23/16 20130101;
F41G 1/35 20130101; F41G 11/003 20130101 |
Class at
Publication: |
42/72 ; 42/115;
42/114 |
International
Class: |
F41G 1/35 20060101
F41G001/35; F41C 23/16 20060101 F41C023/16; F41G 1/34 20060101
F41G001/34 |
Claims
1. A sight assembly removably attachable to a firearm, the sight
assembly comprising: (a) a foregrip; (b) a quantum cascade laser
disposed within the foregrip; and (c) a power source operably
connected to the quantum cascade laser.
2. The assembly of claim 1, further including a heat shield
disposed between the quantum cascade laser and a portion of the
foregrip.
3. The assembly of claim 1, wherein the quantum cascade laser
produces a beam having a wavelength between approximately 2 .mu.m
and approximately 30 .mu.m.
4. The assembly of claim 1, further including a heat shield
disposed between the quantum cascade laser and a barrel of the
firearm.
5. The assembly of claim 1, wherein the power source is disposed
external to the foregrip.
6. The assembly of claim 1, further including a cooling element
thermally connected to the quantum cascade laser.
7. The assembly of claim 6, wherein the cooling element is
active.
8. The assembly of claim 6, wherein the cooling element is disposed
within the foregrip.
9. The assembly of claim 1, further including a second light source
with the foregrip different than the quantum cascade laser.
10. A sight assembly removably attachable to a firearm, the sight
assembly comprising: (a) a quantum cascade laser adjustably mounted
within a foregrip; (b) a second light source disposed within the
foregrip; and (c) a power source electrically connected to the
quantum cascade laser and the second light source.
11. The assembly of claim 10, wherein a position of the second
light source is adjustable relative to a position of the quantum
cascade laser.
12. The assembly of claim 10, further including an adjustment
assembly configured to position the quantum cascade laser and the
second light source relative to the foregrip.
13. The assembly of claim 12, wherein the adjustment assembly
positions the quantum cascade laser in unison with the second light
source.
14. The assembly of claim 10, further including a cooling element
thermally connected to the quantum cascade laser.
15. The assembly of claim 10, wherein the power source is disposed
external to the foregrip.
16. The assembly of claim 10, wherein a position of at least one of
the quantum cascade laser and the second light source can be
adjusted while the foregrip is connected to the firearm.
17. A sight assembly for a firearm, comprising: (a) a quantum
cascade laser disposed within a foregrip; and (b) a second light
source disposed within the foregrip, a vertical axis of at least
one of the quantum cascade laser and the second light source being
co-linear with a vertical axis of a firearm barrel when the
foregrip is attached to the firearm.
18. The assembly of claim 17, wherein the quantum cascade laser and
the second light source are aligned with the vertical axis of the
barrel.
19. The assembly of claim 17, further including a third light
source disposed within the foregrip, a horizontal axis of the third
light source being collinear with a horizontal axis of at least one
of the quantum cascade laser and the second light source.
20. A sight assembly for a firearm, comprising: (a) a foregrip; (b)
a first light source disposed within the foregrip, the first light
source emitting a beam having a wavelength between approximately 2
.mu.m and approximately 30 .mu.m; and (c) a second light source
different from the first light source adjustably mounted with
respect to the first light source within the foregrip.
21. The assembly of claim 20, wherein the second light source emits
a beam having a wavelength between approximately 0.9 .mu.m and
approximately 2.5 .mu.m.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation-in-part of U.S.
patent application Ser. No. 12/334,111, filed on Dec. 12, 2008,
which claims the benefit of U.S. Provisional Patent Application No.
61/013,906, filed on Dec. 14, 2007. The entire disclosure of each
of these applications is expressly incorporated herein by
reference.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
REFERENCE TO A "SEQUENCE LISTING"
[0003] Not applicable.
BACKGROUND OF THE INVENTION
[0004] 1. Field of the Invention
[0005] The present invention relates to firearms, and, in
particular, to sight assemblies used with firearms.
[0006] 2. Description of Related Art
[0007] It is now common in law enforcement and certain military
operations for weapons to be equipped with a laser sighting device,
that is, a laser mounted on the weapon that propagates a relatively
narrow, intense laser light beam to a target so as to produce a
spot on the target essentially where the projectile will intercept
the target if the weapon is discharged. This enables the weapon to
be aimed precisely by pointing the weapon so that the spot lies on
the target at the point where the person using the weapon wants the
projectile to strike the target. Such a laser sighting device is
disclosed, for example, in Toole et al. U.S. Pat. No. 5,435,091.
Laser sights are particularly effective as sighting devices because
the lasers do not require users to align an eye with a sighting
device, which can limit or obscure the user's view of the targets
or their surroundings.
[0008] Laser sights have been mounted from conventional accessory
mounts, such as Picatinny rails, in the same way that scopes and
other accessories have been mounted on firearms. Typically, the
laser sight modules include receptors for engaging the accessory
mounts on the firearms. For example, dovetail-type receptors have
been formed in laser sight modules for engaging Picatinny rails on
the firearms. Laser sights have been mounted from different types
of accessory mounts on the firearms, including from other types of
rails, using mating receptors and have also been mounted on
firearms using clamping devices or other forms of attachment for
engaging firearm barrels, frames, or other components that are not
otherwise intended as accessory mounts.
[0009] Often, it is desirable to mount the laser sights so that the
sights can be removed and transferred between firearms, generally
with as little adjustment as possible. Again, rails, particularly
Picatinny-type rails, have been used for this purpose. The rails
can be formed integral with the firearm frames or clamped or
otherwise attached to the firearm barrels or frames.
[0010] Both the accessory mounts presented on firearms and the
receptors for engaging them tend to offset the laser sights from
the barrels. Alternative adapter structures used for attaching
laser sights to firearm components that are not otherwise arranged
as mountings also tend to offset the laser sights from firearm
barrels. Among the accessory mounts, rail mounts, such as Picatinny
rails, offset laser sights by the space occupied by the rails
themselves and any attachments for fixing the rails to the firearm
barrels or frames. In addition, the receptors used for engaging the
rails can take up more space and displace the laser sights farther
from firearm barrels. The known laser sights mounted in this way
are also exposed to jarring and can encumber the handling or
operation of firearms, particularly as the laser sights are mounted
at increasing offset from firearm barrels. In addition, known laser
sights are only configured to emit a single laser and are not
configured to operate multiple lasers using a single control
circuit.
[0011] In addition to the drawbacks discussed above, known sight
assemblies for firearms also suffer from limited functionality. In
particular, while known sight assemblies may include, for example,
locating lasers, markers, or other signal emitters, such signal
emitters are typically inefficient and potentially dangerous for
use in combat, law enforcement, reconnaissance, or other like
areas. For instance, the beams, lasers, signals, or other such
signals emitted by known signal emitters may be visible by
conventional night vision goggles or other like viewing devices.
Such viewing devices are widely available and used by both U.S.
troops and opposition groups. Thus, the signals emitted by sight
assemblies equipped with known signal emitters are detectable by
opposition groups, making stealth operation, targeting,
identification, or other operations difficult if not
impossible.
[0012] In addition, some known signal emitters, such as thermal
markers or other devices emitting radiation, pulse signatures, or
other signals in the thermal band, may have a relatively limited
range. For example, the signals emitted by known devices are not
easily detected beyond a range of approximately one km. While this
limited range may be relevant in a tightly confined, troop-focused
combat arena, signals emitted by such thermal markers or other
known signal emitters may not be easily seen from great distances,
thus making locating, for example, troops utilizing weapons having
a sight assembly with such a signal emitter difficult.
[0013] Accordingly, the disclosed systems and methods are directed
toward overcoming one or more of the problems set forth above.
SUMMARY OF THE INVENTION
[0014] In an exemplary embodiment of the present disclosure, a
sight assembly for a firearm includes a foregrip removably
attachable to the firearm, a first light source disposed within the
foregrip, and a different second light source disposed within the
foregrip. The assembly also includes a power source electrically
connected to the first and second light sources, and a control
circuit configured to control activation of the first and second
light sources.
[0015] In such an exemplary embodiment, a position of the first
light source is adjustable relative to a position of the second
light source. In addition, the assembly further includes an
adjustment assembly configured to position the first and second
light sources relative to the foregrip, a selection device
configured to allow activation of at least one of the first light
source and the second light source at a time, and an activation
device configured to activate the one of the first light source and
the second light source. Activating the one of the first light
source and the second light source produces one of a continuous
laser beam and a pulsed laser beam.
[0016] In such an exemplary embodiment, the first and second light
sources include one of a green laser, a red laser, an infra-red
laser, an infra-red LED, a white and colored LED, a class 3A laser
having an output of less than 5 mW, a search light, a traveling
light, and a guide light. In addition, the assembly also includes a
locking assembly configured to substantially immobilize the
foregrip with respect to the firearm. Moreover, the power source
comprises at least one battery and the at least one battery
comprises one of a plurality of AA batteries and a DL-123 battery.
In addition, the power source is disposed within the foregrip and
the control circuit is disposed within the foregrip, the first
light source is a laser, and the second light source is an LED.
[0017] In another exemplary embodiment of the present disclosure, a
method of manufacturing a sight assembly for a firearm includes
adjustably mounting a first light source and a second light source
within a foregrip of the firearm and connecting the first and
second light sources to a control circuit configured to activate
the first and second light sources in response to a control
signal.
[0018] In such an exemplary embodiment, the control circuit is
configured to direct power to one of the first and second light
sources while the other of the first and second light sources is
deactivated. The exemplary method further includes mounting a
selection device to the foregrip, the selection device being
configured to allow activation of at least one of the first light
source and the second light source at a time, mounting an
activation device to the foregrip, the activation device being
configured to activate the one of the first light source and the
second light source. Such an embodiment also includes defining a
power source compartment within the foregrip, the power source
compartment being configured to receive a removable power source.
Such an embodiment also includes defining a storage compartment
within the foregrip configured to receive a removable sight
assembly adjustment tool, and securing an adjustment assembly to
the foregrip, the adjustment assembly configured to enable
adjustment of the first light source relative to the second light
source.
[0019] In still another exemplary embodiment of the present
disclosure, a method of activating a component of a sight assembly
for a firearm includes connecting a foregrip to a mounting rail of
the firearm, selecting between a first light source and a second
light source disposed substantially within the foregrip, and
activating the selected light source.
[0020] In such an exemplary embodiment, activating the selected
light source includes sending a control signal to the selected
light source via a control circuit electrically connected to the
first and second light source, and the control signal originates at
an activation device mounted to the foregrip. In addition,
activating the selected light source includes directing a beam of
light in the direction of a target and manipulating an activation
device mounted to the foregrip. The activation device is
substantially noise-free. Moreover, in such an exemplary
embodiment, selecting between the first light source and the second
light source includes manipulating a selection device mounted to
the foregrip, and the selected light source comprises a warning
laser and includes a mechanism configured to assist in removably
attaching the foregrip to the firearm wherein the clamping
mechanism is reversible and further includes a third light source
disposed within the foregrip.
[0021] In still another exemplary embodiment, the first light
source comprises a laser and the second light source comprises a
range finder wherein at least one of the first and second light
sources includes a laser having an output of greater than 5 mW. In
addition, at least one of the first and second light sources
includes a laser having friend or foe data encoding. Such exemplary
embodiment activates the one of the first light source and the
second light source produces one of a continuous laser beam and a
pulsed laser beam. In another embodiment of the present disclosure,
the at least one battery comprises one of a plurality of AA
batteries and a DL-123 battery.
[0022] In still another embodiment of the present disclosure, a
sight assembly for a firearm includes a foregrip removably
attachable to the firearm, and a first light source disposed within
the foregrip, a vertical axis of the first light source being
collinear with a vertical axis of a firearm barrel when the
foregrip is attached to the firearm. Such an embodiment further
includes a second light source disposed within the foregrip, a
vertical axis of the second light source being collinear with the
vertical axis of the firearm barrel when the foregrip is attached
to the firearm. In addition, the foregrip is removably attachable
to a rail of the firearm and the foregrip is removably attachable
beneath the firearm barrel. The first light source includes a
laser, and the sight assembly further includes a second light
source disposed within the foregrip. In an exemplary embodiment,
the second light source is a travelling light and an adjustment
tool is disposed within a power source compartment of the foregrip.
The assembly further includes a plurality of AA batteries disposed
within the power source compartment and a reversible clamping
mechanism configured to assist in removably attaching the foregrip
to the firearm. In addition, the foregrip is removably attachable
to a plurality of different firearm rails.
[0023] In such an exemplary embodiment, the foregrip further
includes a selection device configured to transition the first
light source between a continuous and a pulsed mode of operation.
In another embodiment, the foregrip further includes an activation
device configured to operate the first light source in one of a
momentary mode and a latched mode.
[0024] In another exemplary embodiment of the present disclosure, a
sight assembly removably attachable to a firearm includes a
foregrip, a quantum cascade laser disposed within the foregrip, and
a power source operably connected to the quantum cascade laser.
[0025] In such an exemplary embodiment, the quantum cascade laser
produces a beam having a wavelength between approximately 2 .mu.m
and approximately 30 .mu.m. In addition, the power source is
disposed external to the foregrip. In such an exemplary embodiment,
the assembly further includes a heat shield disposed between the
quantum cascade laser and a portion of the foregrip such as, for
example, an outer surface of the foregrip housing grasped by an
operator of the firearm. In another exemplary embodiment, the
assembly includes a heat shield disposed between the quantum
cascade laser and a barrel of the firearm.
[0026] In such an exemplary embodiment, the assembly includes a
cooling element thermally connected to the quantum cascade laser.
The cooling element is active and is disposed within the foregrip.
Such an exemplary assembly further includes a second light source
with the foregrip different than the quantum cascade laser.
[0027] In a further exemplary embodiment of the present disclosure,
a sight assembly removably attachable to a firearm includes a
quantum cascade laser adjustably mounted within a foregrip, a
second light source disposed within the foregrip, and a power
source electrically connected to the quantum cascade laser and the
second light source. In such an exemplary embodiment, a position of
the second light source is adjustable relative to a position of the
quantum cascade laser. Such an exemplary embodiment further
includes an adjustment assembly configured to position the quantum
cascade laser and the second light source relative to the foregrip,
and the adjustment assembly positions the quantum cascade laser in
unison with the second light source. In such an exemplary
embodiment, the quantum cascade laser and the second light source
would be co-aligned.
[0028] In such an exemplary embodiment, the assembly also includes
a cooling element thermally connected to the quantum cascade laser,
the power source is disposed within or external to the foregrip,
and a position of at least one of the quantum cascade laser and the
second light source can be adjusted while the foregrip is connected
to the firearm.
[0029] In another exemplary embodiment of the present disclosure, a
sight assembly for a firearm includes a quantum cascade laser
disposed within a foregrip, and a second light source disposed
within the foregrip. In such an assembly, a vertical axis of at
least one of the quantum cascade laser and the second light source
is co-linear with a vertical axis of a firearm barrel when the
foregrip is attached to the firearm.
[0030] In such an exemplary embodiment, the quantum cascade laser
and the second light source are aligned with the vertical axis of
the barrel. In addition, such an exemplary assembly also includes a
third light source disposed within the foregrip. A horizontal axis
of the third light source is collinear with a horizontal axis of at
least one of the quantum cascade laser and the second light
source.
[0031] In still another exemplary embodiment of the present
disclosure, a sight assembly for a firearm includes a foregrip and
a first light source disposed within the foregrip. The first light
source emits a beam having a wavelength between approximately 2
.mu.m and approximately 30 .mu.m. The sight assembly also includes
a second light source different from the first light source
adjustably mounted with respect to the first light source within
the foregrip.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] FIG. 1 is a cross-sectional view of a sight assembly
according to an exemplary embodiment of the present disclosure.
[0033] FIG. 2 is a diagrammatic illustration of a side of the sight
assembly of FIG. 1 according to an exemplary embodiment of the
present disclosure.
[0034] FIG. 3 is another diagrammatic illustration of a side of the
sight assembly of FIG. 1 according to an exemplary embodiment of
the present disclosure.
[0035] FIG. 4 is still another diagrammatic illustration of a front
of the sight assembly of FIG. 1 according to an exemplary
embodiment of the present disclosure.
[0036] FIG. 5 is yet another diagrammatic illustration of a back of
the sight assembly of FIG. 1 according to an exemplary embodiment
of the present disclosure.
[0037] FIG. 6 is another diagrammatic illustration of a top of the
sight assembly of FIG. 1 according to an exemplary embodiment of
the present disclosure.
[0038] FIG. 7 is still another diagrammatic illustration of a
bottom of the sight assembly of FIG. 1 according to an exemplary
embodiment of the present disclosure.
[0039] FIG. 8 is a sight assembly control schematic according to an
exemplary embodiment of the present disclosure.
[0040] FIG. 9 is an isometric illustration of the sight assembly of
FIG. 1 according to an exemplary embodiment of the present
disclosure.
[0041] FIG. 10 is an isometric illustration of the sight assembly
of FIG. 1 removably attached to a firearm according to an exemplary
embodiment of the present disclosure.
[0042] FIG. 11 is an illustration of a firearm barrel axis in
vertical alignment with an axis of a light source according to an
exemplary embodiment of the present disclosure.
[0043] FIG. 12 is an isometric illustration of the sight assembly
of FIG. 1 according to another exemplary embodiment of the present
disclosure.
[0044] FIG. 13 is an isometric illustration of the sight assembly
of FIG. 1 according to still another exemplary embodiment of the
present disclosure.
[0045] FIG. 14 is a sight assembly control schematic according to
another exemplary embodiment of the present disclosure.
[0046] FIG. 15 is an isometric illustration of a sight assembly
according to another exemplary embodiment of the present
disclosure.
[0047] FIG. 16 is an isometric illustration of the sight assembly
FIG. 15 removably attached to a firearm according to an exemplary
embodiment of the present disclosure.
[0048] FIG. 17 is an illustration of a firearm barrel axis in
vertical alignment with an axis of light sources according to
another exemplary embodiment of the present disclosure.
[0049] FIG. 18 is an illustration of a firearm barrel axis in
vertical alignment with an axis of light sources according to still
another exemplary embodiment of the present disclosure.
[0050] FIG. 19 is a cross sectional view of a sight assembly
according to a further exemplary embodiment of the present
disclosure.
[0051] FIG. 20 is a diagrammatic illustration of a side of the
sight assembly of FIG. 19 according to an exemplary embodiment of
the present disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
[0052] FIGS. 1-7,9-13 and 15-20 illustrate sight assemblies
according to exemplary embodiments of the present disclosure. As
shown in FIG. 1, an exemplary sight assembly 10 includes, for
example, a foregrip 12 configured to be removably attached to a
firearm of any type. The assembly 10 also includes a first light
source 14 and a second light source 16, and both of the light
sources 14, 16 are disposed within the foregrip 12. As will be
described in greater detail below, exemplary sight assemblies of
the present disclosure may also include three, four, or more light
sources. In an exemplary embodiment, the foregrip 12 may define a
housing 13, and at least the first light source 14 and the second
light source 16 may be disposed substantially within the housing 13
of the foregrip 12. In such an exemplary embodiment, each component
of the light sources 14, 16 may be disposed within the housing 13
and the housing 13 may define one or more orifices 15, 17 through
which light beams 19, 21, signals, or other like radiation emitted
from the light sources 14, 16 may exit the housing 13.
[0053] The light sources 14, 16 can comprise, for example, any of a
variety of lasers. Typically, the light sources 14, 16 are
self-contained, and one or more of the light sources 14, 16 may
include a lens. The light sources 14, 16 can comprise, for example,
any combination of a green laser, a red laser, a quantum cascade
laser (QCL), an infra-red laser, an infra-red light emitting diode
(LED), a white and colored LED, a laser having an output of
approximately 5 mW (it is understood that lasers having an output
greater than approximately 5 mW or less than approximately 5 mW may
also be used), a search light, a laser having an output of greater
than 5 mW, a guide light, a travelling light, a warning laser, a
range finder, an illuminating light such as a flashlight, and a
communication laser. The light sources 14, 16 can also comprise a
laser capable of and/or otherwise having friend or foe data
encoding. In an exemplary embodiment, one or more of the light
sources 14, 16 may emit a thermal beam, pulse, or signal, and in
such an exemplary embodiment, a thermal imager may be used to view
the thermal beam, pulse, or signal.
[0054] In exemplary embodiments of the sight assemblies described
herein wherein at least one of the light sources 14, 16 comprises a
QCL, the QCL may be configured to emit a beam, pulse, signal,
and/or other type of radiation having a wavelength between
approximately 2 .mu.m and approximately 30 .mu.m. The QCLs
described herein may be, for example, a laser emitting structure
disposed within, adjustably mounted within, and/or otherwise
retained by the housing 13 of the foregrip 12. Such QCLs may be
configured, via one or more lenses, to produce a beam extending
along a focused beam path extending from the QCL external to the
housing 13. Alternatively, such lenses may be omitted, and the
beam, pulse, or signal produced by the QCL may be widely divergent
or otherwise dispersed due to the nature and configuration of the
QCL itself.
[0055] In an exemplary embodiment, the QCL may be selected to
operate in ambient temperature conditions while producing a beam or
other such signal having a wavelength between approximately 2 .mu.m
and approximately 30 .mu.m, with preferred wavelengths of
approximately 2 .mu.m to approximately 5 .mu.m (mid-range) or
approximately 8 .mu.m to approximately 30 .mu.m (long-range). It is
further contemplated that the exemplary light sources 14, 16 may
comprise a plurality of QCLs, thereby providing for a sight
assembly configured to produce beams having a plurality of
different useful wavelengths.
[0056] Any of the QCLs employed by the sight assemblies described
herein may be operably connected to an appropriate driver (not
shown) to provide and/or otherwise produce such desired
wavelengths. It is understood that such a driver can be constructed
to provide either pulsed or continuous wave operation of the QCL.
The rise/fall time of the pulse, compliance voltage, and current
provided to the QCL maybe selected to minimize power consumption
and heat generation of the QCL. These parameters may also be
selected to produce a desirable beam or signal signature for friend
or foe identification. It is further understood that such a driver
may be located within the housing 13 or external to the housing 13,
and may be operably connected to the QCL by any known means. Such a
driver may include a pulse generator, amplifier, pulse switcher,
and/or any other known driver components.
[0057] In further exemplary embodiments of the present disclosure,
the light sources 14, 16 may comprise one or more carbon dioxide
lasers. Such lasers may be useful in any of the law enforcement,
combat, reconnaissance, and/or other applications described herein.
In still a further exemplary embodiment of the present disclosure,
one or more of the light sources 14, 16 may comprise a short
wavelength infrared laser (SWIR). Such a laser may emit a signal or
beam having a wavelength between, approximately 0.9 .mu.m and
approximately 2.5 .mu.m.
[0058] It is also understood that, in exemplary embodiments in
which the light source 14, 16 comprise a QCL, such a QCL can be
tuned to provide a signal or beam having a specific wavelength,
and/or to provide a signal having a pulse or other signature easily
recognizable by U.S. or other friendly/allied forces. Tuning of the
signal or beam emitted by the QCL can be accomplished by any known
means such as, for example, by locating a diffracting grating in
the signal or beam path. Such a grating can be adjustable to allow
selected transmission of a plurality of wavelengths, or fixed to
transmit only a single wavelength. Although the signature of the
beam, pulse, or signal emitted by the QCL may be preset, the
signature, wavelength, frequency, pulse pattern, and/or other
identifiable and distinguishable characteristics of the signal or
beam may be easily tunable in the field and/or during use. These
characteristics may be useful in friend or foe identification and
other applications. In addition, to this grating, the driver
discussed above may also be configured to assist in tuning and/or
otherwise controlling the output of the QCL.
[0059] FIG. 15 illustrates an exemplary sight assembly 100
including, for example, more than two light sources 14, 16. As
shown in FIG. 15, the sight assembly 100 may include a first light
source 14, second light source 16, third light source 23, and
fourth light source 25. Although the sight assembly 100 illustrated
in FIG. 15 includes four light sources, it is understood that other
exemplary sight assemblies of the present disclosure may include
three such light sources or five or more light sources. The light
sources 14, 16, 23, 25 shown in FIG. 15 may comprise any of the
variety of different light sources described above with respect to
light sources 14, 16. In particular one or more of the light
sources 14, 16, 23, 25 may comprise a QCL.
[0060] The housing 13 of the foregrip 12 can be, for example,
substantially fluid-tight such that the light sources 14, 16, 23,
25 can be operable in wet conditions. In an exemplary embodiment,
the foregrip 12 may be rated for substantially complete submersion
in a liquid for a period of at least thirty minutes. In such an
exemplary embodiment, the liquid may comprise, for example, fresh
water or salt water. The assembly 10 may also be configured to
withstand a substantial level of shock, vibration, and/or other
contact typical of rugged use. For example, the assembly 10 may be
configured for use in harsh environments such as, for example,
jungles, swamps, deserts, rocky terrain, and/or other law
enforcement, combat, or self-defense environments. In an exemplary
embodiment, the assembly 10 may be configured to successfully pass
National Institute of justice drop tests, and may meet or exceed
all applicable military specifications.
[0061] An adjustment assembly 22 can be disposed proximate the
light sources 14, 16, 23, 25 and can be configured to position the
light sources 14, 16, 23, 25 relative to the foregrip 12. The
adjustment assembly 22 can also be configured to position the light
sources 14, 16, 23, 25 relative to each other. In an exemplary
embodiment, the adjustment assembly 22 may be configured to
position the light sources 14, 16, 23, 25, in unison, relative to
the foregrip 12. The adjustment assembly 22 may be useful in
adjusting the path of the light beams 19, 21, 66, 68 emitted by the
light sources 14, 16, 23, 25, and exiting the housing 13.
[0062] To assist in adjusting the beam paths, the adjustment
assembly 22 may be configured to manipulate the light sources 14,
16, 23, 25 in any useful direction such as, for example, in the
direction of arrows 36, 38, 40, 42 (FIGS. 11, 17, and 1 8). In
addition, the adjustment assembly 22 may be configured to rotate
the light sources 14, 16, 23, 25 in the clockwise direction of
arrow 44 and/or in the counterclockwise direction of arrow 46.
Accordingly, two or more of the light sources 14, 16, 23, 25 may be
aligned in unison (i.e., co-aligned) or, alternatively, the light
sources 14, 16, 23, 25 may each be aligned independently. For
example, the adjustment assembly 22 may be used to align or
otherwise calibrate a light source operating in the visible
spectrum to a desired impact point of the firearm 52. The
adjustment assembly 22 may then be used to align a QCL or other
light source to the same impact point as the visible spectrum light
source. In this way, the adjustment assembly 22 may be used to
calibrate and/or align each of the light sources 14, 16, 23, 25
relative to one another.
[0063] In an exemplary embodiment in which the light sources 14,
16, 23, 25 comprise a QCL, the QCL may be co-aligned with one or
more of the other light sources operating in the visible spectrum
(approximately 0.4 .mu.m to approximately 0.7 .mu.m). In such an
exemplary embodiment, the adjustment assembly 22 may enable the
user to align the QCL and the visible spectrum light source at the
same time. Thus, the separate beams emitted by the various light
sources 14, 16, 23, 25 may be aligned to converge at the impact
point of the firearm 52 with a single adjustment. In such an
exemplary embodiment, the adjustment assembly 22 may also be used
to align or calibrate these separate beams relative to one another
as discussed above. The adjustment assembly 22 may include, for
example, one or more screws, pneumatic devices, piezoelectric
devices, solenoids, gears, motors, and/or other components
configured to assist in positioning an optical device in an
enclosed and/or portable environment.
[0064] In the exemplary embodiment shown in FIG. 1, the adjustment
assembly 22 may be manually adjusted by using one or more sight
assembly adjustment tools (not shown). The sight assembly
adjustment tool may be utilized to manipulate the adjustment
assembly 22 when the housing 13 is closed and/or substantially
sealed. In such an exemplary embodiment, the sight assembly
adjustment tool may be configured to access and/or otherwise engage
the adjustment assembly 22 via, for example, one or more
substantially fluid-tight channels defined by the housing 13 of the
foregrip 12. In an alternative exemplary embodiment, the adjustment
tool may be utilized to manipulate the adjustment assembly 22 while
the housing 13 is opened and the adjustment assembly 22 is easily
accessible. In still another exemplary embodiment, the adjustment
assembly 22 may be electromechanically adjusted without the use of
a sight assembly adjustment tool. In such an exemplary embodiment,
the foregrip 12 may include one or more buttons, knobs, levers,
and/or other interfaces allowing the user to electromechanically
manipulate the adjustment assembly 22 and to thereby position the
light sources 14, 16 relative to the foregrip 12.
[0065] As shown in FIGS. 11, 17, and 18, when the foregrip 12 is
connected to an exemplary firearm 52 of the present disclosure, at
least one of the light sources 14, 16, 23, 25 may be disposed along
and/or otherwise aligned with a vertical axis 50 of a barrel 54 of
the firearm 52. In an additional exemplary embodiment, at least two
of the light sources 14, 16, 23. 25 may be disposed along and/or
aligned with the vertical axis 50 of the barrel 54 when the
foregrip 12 is mounted to the firearm 52. For example, the vertical
axis 50 of the barrel 54 may pass through and/or be collinear with
the vertical axis of at least one of at least two of the light
sources 14, 16, 23, 25 when the foregrip 12 is connected to the
firearm 52. In an additional exemplary embodiment, the light
sources 14, 16, 23, 25 may be disposed within the foregrip 12 such
that the horizontal axes 58, 60 of at least two of the light
sources 14, 16, 23, 25 are positioned as close to the horizontal
axis 48 of the barrel 54 as possible when the foregrip 12 is
connected to the firearm 52. In such an exemplary embodiment, the
horizontal axes 58, 60 of two or more light sources 14, 16, 23, 25
may be coplanar or may be in parallel planes. Such an exemplary
embodiment may assist in alleviating the barrel offset deficiencies
found in prior art foregrip sight assemblies. It is also understood
that the adjustment assembly 22 may be configured to move the light
sources 14, 16, 23, 25 in the direction of arrows 36, 38, 40, 42
and/or to pivot the light sources 14, 16, 23, 25 in the direction
of arrows 36, 38, 40, 42, in order to achieve the configurations
discussed above. Additionally, a longitudinal axis of at least one
of the light sources 14, 16, 23, 25 may be aligned substantially
coplanar with and/or substantially parallel to a longitudinal axis
of the barrel 54 by manipulating the adjustment assembly 22.
[0066] A selection device 24 of the assembly 10 can be mounted to
the foregrip 12 such that the device 24 can be actuated by a finger
of the user. The selection device 24 can be configured to allow
activation of the light sources 14, 16, 23, 25 as desired. For
example, the selection device 24 can be a switch configured to be
manipulated so as to only allow activation of one of the light
sources 14, 16, 23, 25 at a time. Alternatively, the selection
device 24 can be a button, rotatable knob, and/or other operator
interface configured to select more than one of the light sources
14, 16, 23, 25 for activation at one time. For example, the
selection device 24 may be manipulated to select either the first
light source 14, the second light source 16, or both of the light
sources 14, 16, 23, 25 for activation by the user. The selection
device 24 may also have a setting for pulsed activation of the
light sources 14, 16, 23, 25 and a different setting for continuous
activation of light sources 14, 16, 23, 25. In an exemplary
embodiment, the selection device 24 may have a first setting to
turn on one of the light sources 14, 16, 23, 25. In such an
embodiment, the selection device 24 may also have a second setting
for operating the other light sources 14, 16, 23, 25 in a
continuous mode, a third setting for operating the other light
sources 14, 16, 23, 25 in a pulsed mode, and a fourth setting in
which the light sources 14, 16, 23, 25 are turned off. In such an
embodiment, the one of the light sources 14, 16, 23, 25 may be an
LED and the other light sources 14, 16, 23, 25 may be a laser of
the type described above.
[0067] An activation device 26 of the assembly 10 can be disposed
at a front end of the foregrip 12 to allow activation of the light
sources 14, 16, 23, 25 selected for use. The activation device 26
can have a configuration similar to a trigger or a depressible
switch. In such an embodiment, the activation device 26 may be
configured to energize and/or otherwise activate one or more of the
light sources in the mode specified by the selection device 24.
[0068] In addition to controlling the light sources 14, 16, 23, 25
in a continuous mode or in a pulsed mode, the activation device 26
may have two or more configurations or settings, enabling the
activation and/or operation of the light sources 14, 16, 23, 25
either momentarily when the activation device 26 is in a first
setting or continuously when the activation device 26 is in a
second setting. In an exemplary embodiment, when the activation
device 26 is in the second setting, components of the activation
device 26 may be in a latched configuration such that the selected
light source 14, 16, 23, 25 may be activated without continuous
manipulation of the activation device 26 by the user. In such an
exemplary embodiment, the assembly 10 may be operated substantially
hands-free by the user in the latched configuration. In addition,
in each of the embodiments discussed herein, the activation device
26 may be operated substantially noise-free for stealth
applications.
[0069] A locking assembly 28 can be disposed proximate the section
of the foregrip 12 configured for mounting to the firearm, and can
be configured to assist in substantially immobilizing the foregrip
12 during use and/or attachment to the firearm. The locking
assembly 28 can be any conventional locking assembly known in the
art. The locking assembly 28 may assist in, for example, using the
foregrip 12 in combat, law enforcement, self-defense, and/or other
rugged environments or applications. The foregrip 12 may also
include a clamping mechanism 29 configured to assist in removably
attaching the foregrip 12 to a firearm. In an exemplary embodiment,
the locking assembly 28 may be a component of the clamping
mechanism 29. The clamping mechanism 29 may enable the user to
mount and/or otherwise connect the foregrip 12 to any one of a
plurality of commercially available mounts based on user
preference. As shown in FIG. 10, in an exemplary embodiment, the
foregrip 12 may be mounted on a picatinny rail 56 of a firearm 52.
In additional exemplary embodiments, however, the foregrip 12 may
be connected to other known rails such as, but not limited to, dove
tail rails and T-rails. In addition, the clamping mechanism 29
and/or the locking assembly 28 may be disposed on either side of
the foregrip 12 based on user preference. Such a configuration may
enable the foregrip 12 to be easily removably attachable to the
picatinny rail 56 or other rails of the firearm 52 between uses. In
particular, the clamping mechanism 29 may be reversible in that at
least a portion of the components of the clamping mechanism 29 may
be disposed on either side of the foregrip 12 based on user
preferences. For example, the foregrip 12 illustrated in FIG. 12
shows the clamping mechanism 29 disposed on a first side of the
foregrip 12 while the foregrip 12 illustrated in FIG. 13 shows the
clamping mechanism 29 disposed on the second side of the foregrip
12. The functionality of the clamping mechanism 29 is substantially
the same regardless of which side of the foregrip 12 the clamping
mechanism 29 is disposed on.
[0070] The assembly 10 further includes a power source 18
electrically connected to the light sources 14, 16, 23, 25. The
power source 18 can be any source of power known in the art such
as, for example, one or more batteries. In an exemplary embodiment,
the power source 18 can comprise a plurality of AA batteries. In an
additional exemplary embodiment, the power source 18 can comprise a
DL-123. The power source 18 may be, for example disposable and/or
rechargeable. In an exemplary embodiment, the power source 18 may
be configured to power a QCL of the type described above.
Accordingly, the power source 18 may be operably connected to the
driver discussed above and/or any of the control circuits described
herein. Thus, the amount of power from the power source 18 directed
to the light sources 14, 16, 23, 25 described above may be
controlled and/or otherwise varied in order to alter their output.
For example, one or more of the light sources 14, 16, 23, 25
described herein may be operated in different modes to conserve
energy. For example, a high power mode (approximately 100% of
required voltage and/or current) may be utilized during operation
while a low power mode (approximately 10% to approximately 15% of
required voltage and/or current) may be utilized for training
and/or safety reasons. The driver and/or control circuitry
described herein may be configured to effect these different modes
of operation. It is understood that any type of power source 18,
preferably portable and sufficiently small in size for use with any
of the firearms discussed herein, can be utilized, and such power
source 18 may further include N-type batteries and/or
lithium/manganese dioxide batteries.
[0071] Although FIGS. 1 and 19 illustrate a power source 18
disposed within the foregrip 12, in additional exemplary
embodiments, such as the exemplary embodiment illustrated in FIG.
16, the power source 18 may be disposed outside of the foregrip 12.
In an exemplary embodiment, the power source 18 may be disposed on
and/or otherwise mounted to the firearm 52 to which the foregrip 12
is connected. Exemplary embodiments comprising one or more QCLs may
have significantly greater power requirements than other exemplary
embodiments in which one or more QCLs are not used. In such
exemplary embodiments, a larger power source 18 may be required,
and such power source 18 may not fit, within in, for example, the
housing 13 of the foregrip 18.
[0072] The foregrip 12 can define a power source compartment 32.
The power source compartment 32 can be sized and/or otherwise
configured to receive the power source 18, and the compartment 32
can be configured such that the power source 18 can be easily
removed and/or replaced by the user. The foregrip 12 can also
define a storage compartment configured to store and/or otherwise
receive a removable sight assembly adjustment tool. In an exemplary
embodiment of the present disclosure, the storage compartment may
be defined by a portion of the housing 13. In an alternative
exemplary embodiment, the storage compartment may be defined by a
lid, cap, and/or other closure device of the power source
compartment 32. In such an alternative exemplary embodiment, the
sight assembly adjustment tool may be stored within, for example, a
cap of the power source compartment 32.
[0073] The assembly 10, 100 may also includes a control circuit 20
configured to control activation of the light sources 14, 16, 23,
25 in response to a control signal. The control circuit 20 can
comprise, for example, a first control circuit associated with the
first light source 14, a second control circuit associated with the
second light source 16, a third control circuit associated with the
light source 23, and/or a fourth control circuit associated with
the fourth light source 25. The control signal can be sent by the
activation device 26 mounted to the foregrip 12.
[0074] FIG. 8 illustrates a control schematic associated with the
control of the sight assembly 10 and FIG. 14 illustrates control
schematic associated with the control of the sight assembly 100. In
particular, the power source 18 can provide power to the light
sources 14, 16, 23, 25 via the selection device 24. Distribution of
the power provided by the power source 18 (and, thus, activation of
the light sources 14, 16, 23, 25) can be governed by first, second,
third, and/or fourth control circuits each of which are contained
within the control circuit 20. The control circuit 20 may include
more or less than the four control circuits described herein, and
the number of control circuits within the control circuit 20 may
correspond to the number of light sources employed by the sight
assembly.
[0075] In an exemplary embodiment, the control circuit 20 may
include a universal circuit board capable of being configured to
control multiple similar or dissimilar light sources 14, 16, 23,
25. In such an exemplary embodiment, the circuit board may be
configured at the time the assembly 10, 100 is being manufactured.
In addition, it may be desirable to maximize the output power of
one or more of the light sources 14, 16, 23, 25 within the limits
of applicable regulations and tolerances. Such regulations and/or
tolerances may be dictated by, for example, the class to which the
light source belongs. Accordingly, the circuit board may enable the
user to calibrate the light sources 14, 16, 23, 25 such that their
respective outputs are at the appropriate levels, respectively.
[0076] In an exemplary embodiment in which at least one of the
light sources 14, 16, 23, 25 comprises a QCL, a cooling element may
be disposed in thermal contact with the QCL. FIG. 19 illustrates an
exemplary embodiment in which such a cooling element 64 may be
disposed within the housing 13, while FIG. 16 illustrates an
additional exemplary embodiment in which the cooling element 64 may
be disposed outside of the foregrip 12 such as, for example, on a
portion of the firearm 52 to which the foregrip 12 is connected.
Regardless of its location, the cooling element 64 maybe employed
to maintain one or more of the QCLs described herein at a desirable
operating temperature. Certain configurations of the cooling
element 64 may require, for example, energy input thus, in an
exemplary embodiment, at least a portion of the cooling element 64
may be operably connected to the power source 18.
[0077] The cooling element 64 may assist in cooling the QCL to a
specified and/or desired operating temperature range. For example,
the cooling element 64 may assist in cooling the QCL to
approximately room temperature, or between approximately 65.degree.
Fahrenheit and approximately 75.degree. Fahrenheit. The cooling
element 64 may comprise a thermal electric cooler or any other
cooler known in the arts. For example, the cooling element 64 may
be either a passive device or an active device. Exemplary passive
cooling element 64 may include, heat sinks, phase change elements,
radiators, and/or one or more fins configured to dissipate thermal
energy from the QCL. Active cooling elements 64, on the other hand,
may include Peltier modules, and/or Stirling devices.
[0078] In addition to the uses described herein, it is understood
that the sight assemblies 10, 100 may be used to communicate, for
example, information pertaining to the location of the target, the
location of friendly forces, the location of a perimeter or
territory, the location of an injured or distressed soldier, and/or
other useful identification or location information to one or more
remote detectors or receivers. One or more of the beams, pulses, or
signals emitted by the sight assemblies 10, 100 may be used to
locate, identify, and/or distinguish such targets, perimeters,
troops, territories, locations, or other items of interest. A
remote receiver may be configured to receive and interpret such
emissions for use in the desired application. Such receivers may be
located, for example, on or in the foregrip 12, on the firearm 52
to which the foregrip 12 is attached, and/or in a remote troop
base, post, or control center. Such friendly beams, pulses, or
signals may be easily distinguishable from similar foe signals
based on the characteristics or properties thereof. The signal,
beam, pulse, and/or other emissions of the light sources 14, 16,
23, 25 may be distinguished from other like emissions having, for
example, like frequencies, pulse signatures, information and/or any
other identifiable or distinguishable characteristics or
properties. It is understood that such emissions may be in the
thermal band, and that one or more receivers may comprise a thermal
imager configured to receive and display such emissions for
viewing.
[0079] The inclusion of light sources 14, 16, 23, 25, such as, for
example, a QCL into a foregrip 12 was heretofore impractical due to
the difficulties associated with operating a QCL. For instance, due
to their inherent inefficiencies, known QCL chips and/or materials
generate substantial amounts of heat. Such heat may make it
uncomfortable to use QCLs in connection with hand-held devices,
such as foregrips 12 or firearms 52, without utilizing adequate
thermal management techniques to minimize the danger of operating a
QCL in close proximity to the operator. An exemplary method of
minimizing this risk is to pulse the QCL during operation as
opposed to leaving it on continuously. Alternatively, as will be
discussed below, one or more heat shields may be employed.
[0080] In addition, QCLs are particularly sensitive to heat and
must be maintained at a relatively low temperature for peak
efficiency. As a result, it may be desirable to mount, locate
and/or operate QCLs as far away from sources of heat as possible.
Since barrels and/or other components of firearms produce
significant amounts of heat during use, operating a QCL in the
proximity of such components is not generally acceptable.
[0081] The sight assemblies 10, 100 described herein overcome these
obstacles, and many of the deficiencies of known sight assemblies,
by utilizing a robust power supply sized for use with a QCL and/or
by providing for cooling of the QCL during operation. Such cooling
can be achieved through the use of a cooling element 64 thermally
connected to the QCL and operative to maintain the QCL at a
desirable operating temperature for peak efficiency.
[0082] To assist in thermally insulating the QCL from the barrel or
other components of the firearm 52 that may be at elevated
temperatures, and to thermally insulate the operator from the QCL
itself during use, the sight assemblies 10, 100 described herein
may also employ a thermal barrier between, for example, the QCL and
the barrel 54 and/or rail 56 of the firearm 52. Such a barrier may
be created by, for example, distancing the QCL from the barrel 54
and/or the rail 56. In addition, any of the cooling elements 64 may
assist in forming such a barrier, and one or more heat shields 70
may be also be utilized to form such a barrier. Such heat shields
70 may insulate the QCL from, for example, the barrel 54, and may
further assist in maintaining the QCL within its peak operating
temperature range. Such heat shields 70 may also insulate the QCL
from, for example, the hand of a soldier using the firearm 52 to
which the foregrip 12 is attached.
[0083] The heat shields 70 may comprise an insulating foam, gel,
fabric, honeycomb-like structure, or other like material or
structure configured to block the transmission of heat to and/or
from the QCL. In an exemplary embodiment, a honeycomb-like
structure may be at least partially filled and/or otherwise
combined with an insulating foam, gel, fabric, or other like
material to form a heat shield 70. It is understood that any
combination of the above materials or structures may be employed in
the exemplary heat shield embodiments described herein.
[0084] One or more heat shields 70 may be disposed between the QCL
and the barrel 54 or rail 56 of the firearm 52 to which the
foregrip 12 is attached. A heat shield 70 may be disposed within
the foregrip housing 13 or external thereto. For example, a heat
shield 70 may be disposed proximate and/or connected to the
underside of the barrel 54 external to the foregrip housing 13.
Such a heat shield 70 may extend along at least a portion of the
barrel 54. In another exemplary embodiment, a heat shield 70 may be
disposed proximate or connected to a top portion of the housing 13,
either internal or external thereto. For example, as shown in FIG.
20, a heat shield 70 may be disposed external to the housing 13,
between the housing 13 and the mount 28.
[0085] In another exemplary embodiment, a heat shield 70 may be
thermally connected to the QCL within the housing 13, and/or may be
disposed between the QCL and one or more walls of the housing 13 to
substantially prohibit heat from passing from the barrel to the
QCL. A heat shield 70 may substantially surround the QCL on one,
two, three, or more sides. In an additional exemplary embodiment, a
heat shield 70 may substantially surround the entire QCL within the
housing 13. In such an exemplary embodiment, the heat shield 70 may
still permit the QCL to emit a beam, pulse, or signal as desired.
In addition, a heat shield 70 may be positioned to block heat from
passing from the QCL to the hand or other body part of an operator
during use. Accordingly, at least a portion of the heat shield 70
and/or an additional heat shield 70 may be disposed between, for
example, the QCL and the portion of the housing 13 grasped or held
by the operator during use. In an exemplary embodiment, one or more
heat shields 70 may substantially conform to an interior surface or
portion of the housing 13. For example, one or more heat shields 70
may be connected to and/or supported by one or more walls of the
housing 13.
[0086] Other embodiments of the disclosed assembly 10, 100 will be
apparent to those skilled in the art from consideration of this
specification. For example, additional embodiments of the disclosed
assembly 10 may include a shot counter configured to indicate the
number of times the firearm has been discharged. It is intended
that the specification and examples be considered as exemplary
only, with the true scope of the invention being indicated by the
following claims.
* * * * *