U.S. patent application number 12/043950 was filed with the patent office on 2009-02-12 for bipod mount with integral hand grip.
Invention is credited to Da Keng.
Application Number | 20090038200 12/043950 |
Document ID | / |
Family ID | 40345168 |
Filed Date | 2009-02-12 |
United States Patent
Application |
20090038200 |
Kind Code |
A1 |
Keng; Da |
February 12, 2009 |
Bipod Mount with Integral Hand Grip
Abstract
A bipod mount with an integral hand-grip for mounting a bipod
supporting grip assembly to a "picatinny" mounting rail structure
as are often affixed below the forearm stock of a firearm such as a
military rifle (e.g., as per standard MIL-STD-1913) includes a hand
grip that, in a first configuration, conceals an un-deployed
bipod's frame. The bipod frame includes a pair of
extensible/retractable legs, each having a pair of telescoping
sections to enable the height of the bipod to be adjusted as
desired.
Inventors: |
Keng; Da; (Smyrna,
GA) |
Correspondence
Address: |
JONES, TULLAR & COOPER, P.C.
P.O. BOX 2266 EADS STATION
ARLINGTON
VA
22202
US
|
Family ID: |
40345168 |
Appl. No.: |
12/043950 |
Filed: |
September 17, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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60905044 |
Mar 6, 2007 |
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Current U.S.
Class: |
42/94 |
Current CPC
Class: |
F41A 23/10 20130101 |
Class at
Publication: |
42/94 |
International
Class: |
F41C 27/00 20060101
F41C027/00 |
Claims
1. A bipod mount and integral handgrip, comprising: (a) a clamp
body carrying first and second bipod leg assemblies, said first and
second bipod leg assemblies having a proximal end hingedly attached
to said clamp body to proved a closed position, wherein said leg
assemblies are together and a spread position, wherein said leg
assemblies provide a bipod support; (b) said first and second bipod
leg assemblies each having a a textured, non-reflective outer
surface; (c) said first and second bipod leg assemblies being
configured in a mirror-image pair to close tolerances such that
when closed, there is a small and uniform vertical seam
therebetween; and (d) wherein said first bipod leg assembly's
exterior and said second bipod leg assembly's exterior, when said
bipod is in a closed position they define a unitary vertical grip
having a substantially seamless or continuous exterior
circumference.
2. The bipod mount and integral handgrip of claim 1, wherein each
leg assembly comprises a distal end opposing said proximal end,
wherein said distal end carries an end effecter
3. The bipod mount and integral handgrip of claim 2, wherein each
leg assembly comprises a spring biased extendable bipod leg member
terminating distally in a ski foot end effecter.
4. The bipod mount and integral handgrip of claim 2, wherein (a)
said first and second leg assemblies are configured with a latch
for latching said first and second leg assemblies in the closed
position, and (b) between the bipod leg assemblies, a spreading
force is provided by a spring which bears outwardly on the first
and second leg assemblies and are biased to spread apart when said
latch is released.
5. The bipod mount and integral handgrip of claim 4, wherein (a)
said first leg assembly has an outer grip surface defined by a left
side body and includes lock subassembly; (b) wherein said lock
subassembly comprises an elongate deployment member which, when
pressed, actuates a pinned closing latch and compresses a
deployment button spring while disengaging a pivoting closing latch
and compressing a pivoting closing latch spring.
6. A method for deploying a bipod mount and integral handgrip: (a)
providing a clamp body carrying first and second bipod leg
assemblies, said first and second bipod leg assemblies having a
proximal end hingedly attached to said clamp body to proved a
closed position, wherein said leg assemblies are together and a
spread position, wherein said leg assemblies provide a bipod
support; said first and second bipod leg assemblies each having an
outer surface and being configured in a mirror-image pair to close
tolerances such that when closed, there is a small and uniform
vertical seam therebetween; and wherein said first bipod leg
assembly's exterior and said second bipod leg assembly's exterior,
when in a closed position, define a unitary vertical grip having a
substantially seamless or continuous exterior circumference; (b)
opening the clamp and then sliding said bipod mount with integral
hand-grip assembly over a firearm's rail; (c) selecting a fore-aft
position and then clamping said bipod mount to securely engage
bipod mount with integral hand-grip to said firearm; (d) grasping
the continuous exterior circumferential surface defined by the
exterior surfaces of the first bipod leg assembly's exterior and
said second bipod leg assembly's exterior.
7. The method of claim 6, further comprising: (e) deploying the
bipod by releasing the latch, whereupon the first bipod leg
assembly is spread laterally apart from said second bipod leg
assembly 318; and (f) resting the firearm on the bipod leg
assemblies' distal ends.
8. The method of claim 7, further comprising: (g) extending at
least one of the extendable bipod legs.
Description
RELATED PATENT APPLICATIONS AND PRIORITY CLAIM INFORMATION
[0001] This application claims priority to and is owned by the
applicant/owner of co-pending provisional application No.
60/905,044, filed Mar. 6, 2007, the entire disclosure of which is
incorporated herein by reference. This application is also owned by
the applicant/owner of U.S. Pat. No. 5,711,103 and U.S. Pat. No.
5,815,974, the entire disclosures of which are incorporated herein
by reference. Additionally, this application is owned by the
applicant/owner of provisional application number 60/338,153, filed
Nov. 13, 2001, the entire disclosure of which is also incorporated
herein by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to military small arms and
support devices such as pistol-style grips and bipods, and more
particularly, relates to a grip assembly for attaching a
pistol-style grip and bipod to a mounting rail structure affixed to
the forearm stock of a military-style small arm. The grip attaches
to the rail structure and enables quick deployment of an integral
bipod.
[0004] 2. Background of the Invention
[0005] Large caliber or select fire automatic military-style small
arms can be difficult to control when firing and muzzle rise can
cause the marksman to shoot above an intended point of aim.
Controlling muzzle rise has been accomplished in the prior art by
using a pistol-style grip at a fixed location under the barrel,
near the muzzle, as best epitomized by the police version of the
famed Thompson.RTM. sub-machinegun. While a permanently fixed
pistol-style grip serves well in some situations; it limits the
usefulness of the weapon and is not well suited for precise
aiming.
[0006] When shooting firearms, especially in stressful tactical
situations, it is important that the firearm be maintained in a
steady, stable position to insure accuracy of aim. Most shooters
are not able to hold a military-style small arm consistently in a
set position without wavering, especially after the onset of
fatigue.
[0007] Accordingly, peripheral support devices have been used in
conjunction with military-style small arm since the early creation
of firearms as a means of stabilizing a military-style small arm to
reduce vibration, wavering, etc., and to improve accuracy. In the
past, shooters have used everything from large stationary objects
such as rocks and tree branches to forked sticks, shooting slings,
bipods and tripods. Early bipod and tripod supports typically were
somewhat crude strands that generally were bulky, inconvenient and
difficult to use and typically were not easily adjustable. In more
recent times, bipod supports have been developed that are compact
and relatively lightweight and are mountable to the forearm stock
of a firearm, such as a rifle, to make the bipods portable with the
firearm. Most conventional bipod supports include a pair of legs
that can be pivoted from an up position adjacent the firearm stock,
to a down position engaging a support surface, with the legs also
being extensible to adjust the height of the support.
[0008] A problem with conventional grips and bipods has been
inability to mount either a grip or bipod to most firearms without
requiring the use of special mounting tools and the machining or
modification of the firearm stock to accommodate the grip or bipod.
Additionally, most grips or bipods are not designed for quick and
easy attachment and release from a firearm's stock. For example,
U.S. Pat. No. 5,194,678 discloses a bipod assembly that includes
legs that are pivotable independently of one another for ease of
adjustment, but which is not easily attached/detached from the
firearm. Other types of conventional bipods offer varying types of
mountings that can be fitted to various types of rifles without
requiring modification or machining of the rifle stock. For
example, Harris Engineering, Inc. manufactures a series of bipod
mounts for use with a variety of different firearms. However, these
bipod mounts do not provide for the quick-release of the bipods
from the firearm.
[0009] One of the most popular bipods on the market has been the
Parker-Hale bipod assembly. This bipod includes a pair of
telescoping legs attached to a mounting frame, and a mounting block
for mounting the bipod to the firearm. The mounting block of the
Parker-Hale bipod is releasably attached to the mounting frame of
the bipod to enable quick attachment/release of the legs of the
bipod from the firearm. The problem with the Parker-Hale bipod is
that to mount the bipod to a firearm, the forearm stock of the
firearm generally must be modified to mount a track or slide
therein, along which the mounting block is received to mount the
bipod to the firearm; this leaves no room for a grip. In addition,
such modifications generally are expensive and often must be done
by specialty gunsmiths and can mar the finish of the firearm.
[0010] Another problem often encountered with the bipods of the
prior art is that the attachment to the firearm (e.g., rifle) is
defined by a union of substantially perpendicular lengths of steel.
When a shooter assumes the prone position, for example, the optimum
results are obtained by forcing the forward hand distally, usually
against the front mounting point of a sling, thereby creating a
tension in the shooter's body to support the rifle and steady the
point of aim. If a shooter were to force his or her forward hand
against the perpendicular steel parts of the prior art bipods, the
result would be a painful grip against irregularly shaped parts
having no ergonomic benefit for the shooter.
[0011] This situation is compounded for military or police shooters
using military or SWAT rifles carrying special mounts known as
picatinny rails under the rifle forearm; the picatinny rails are
customarily used for mounting grenade launchers, lights or other
accessories and so the rifles often weigh much more than the
lighter sporting arms most shooters are used to carrying.
[0012] Combining accessories in the interest of saving clutter and
weight appears to be part of the solution to these challenges. The
prior art for supports adapted for use with military-style small
arms includes U.S. Pat. No. 7,111,424, to Moody et al, entitled
"fore grip with bipod" and this product is now offered as a
Grip-Pod.TM. support. Mr. Moody's Grip-Pod.TM. support does
integrate a concealed bipod in a fore-grip, but that bipod has a
pair of short bipod legs deployed from the fore-grip's tubular
interior lumen, so that the bipod legs have a length less than or
equal to the grip's interior axial length and so the resulting
structure is relatively unstable when deployed. Mr. Moody's
Grip-Pod.TM. support, when deployed, has a bipod leg hinge point 27
that positions the top of the bipod with a spring-biased plunger at
the open distal or bottom end of the fore-grip, and so the deployed
bipod is not strongly supported close to the mount or picatinny
rail engaging the rail-receiving slot 4.
[0013] Accordingly, it can be seen that a need exists for a bipod
mount with an integral hand-grip for selectively permitting a user
to deploy a bipod from a grip adapted for use in military or SWAT
situations, where the shooter may need either to control muzzle
rise or, for precision aiming, to have a stable support. Ideally,
the bipod mount with an integral hand-grip should not require
extensive modification to the firearm such as machining of the
forearm stock of the firearm. Preferably, a bipod mount with an
integral hand-grip would also enable quick attachment and
detachment to a military-style small arm or other firearm.
SUMMARY OF THE INVENTION
[0014] The present invention comprises a bipod mount with an
integral hand-grip for mounting a bipod supporting grip assembly to
a "picatinny" mounting rail structure as are often affixed below
the forearm stock of a firearm such as a military-style small arm
or rifle (e.g., as per standard MIL-STD-1913). In particular, the
present invention is directed to mounting a Parker-Hale style of
firearm bipod as part of a supporting grip assembly including a
contoured mount inletted to cover and attach to a picatinny rail
affixed beneath the forearm stock of the firearm.
[0015] The bipod mount with an integral hand-grip assembly is
releasably attachable to a military-style small arm and includes a
pair of extensible/retractable legs, each having a pair of
telescoping sections to enable the height of the bipod to be
adjustable as desired.
[0016] The bipod mount with an integral hand-grip assembly of the
present invention generally comprises an elongate downwardly
projecting handle or grip terminating proximally in an integral
grip mount adapted to slide over and receive a picatinny rail.
[0017] The mount is releaseably affixed to and hangs from a
military-style small arm's picatinny rail and supports the first
and second bipod legs at a hinge point that is near the upper end
of the assembly, close to the rail, thereby providing a solid
connection between the deployed bipod legs and the rail.
[0018] The picatinny rail is a standard element of the military
firearm and comprises a mounting rail structure (per standard
MIL-STD-1913) having evenly spaced transverse grooves or troughs of
standard size. The picatinny rail is normally used for attaching a
variety of accessories such as lights, grenade launchers and other
devices.
[0019] The bipod mount with integral hand-grip assembly of the
present invention preferably has opposing, separable side walls
with one wall defined by a removable clamp member. The opposable
walls each have first and second transversely aligned horizontal
fastener openings through which first and second transverse screws,
pins or fasteners are received and attached to the side walls, with
the shank of each transverse fastener extending through the clamp
member, to attach the mount to the rail.
[0020] Once the mount has been attached to the picatinny rail of
the firearm and placed in a selected fore/aft position, the bipod
mount with integral hand-grip mounting block provides a quick and
easy push-button mechanism permitting the user to deploy the
bipod's legs while providing a support for the forearm stock of the
firearm in a stable, secure selected position. This prevents the
bipod mount and thus the bipod from shifting fore and aft or
wobbling during use.
[0021] Various objects, features and advantages of the present
invention will become apparent to one skilled in the art upon a
review of the following specification, when taken in conjunction
with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIGS. 1-20 illustrate features and use of a first embodiment
of the bipod mount and integral handgrip assembly, in accordance
with the present invention.
[0023] FIGS. 21-23D illustrate features and use of a second
embodiment of the bipod mount and integral handgrip assembly, in
accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0024] Turning now to the exemplary embodiments illustrated in
FIGS. 1-20, bipod mount with integral hand-grip 200 is configured
for mounting a bipod supporting grip assembly to a "picatinny"
mounting rail structure 120 as are often affixed below the forearm
stock of a firearm such as a military-style small arm or rifle such
as an M4 rifle 100 (e.g., as per standard MIL-STD-1913). In
particular, the present invention is directed to mounting a
Parker-Hale style of firearm bipod as part of a supporting grip
assembly including a contoured mount inletted to cover and attach
to picatinny rail 120 affixed beneath the forearm stock of firearm
100.
[0025] The bipod mount with an integral hand-grip assembly of the
present invention 200 is releasably attachable to rifle 100 and
includes a pair of extensible/retractable leg assembly, each leg
assembly has a tubular leg 226 that slidably receives a spring
biased elongate telescoping leg extension 228 to enable the height
of the bipod to be adjusted as desired.
[0026] The bipod mount with an integral hand-grip assembly of the
present invention 200 generally comprises a two-part, elongate
downwardly projecting handle or grip terminating proximally in an
integral grip mount 260 adapted to slide over and receive picatinny
rail 120.
[0027] The mount 260 is releaseably affixed to and hangs from rail
120 and supports the first and second bipod legs at a hinge point
that is near the upper end of the assembly, close to the rail 120,
thereby providing a solid connection between the deployed bipod
legs and the rail 120, as shown in FIGS. 1-4.
[0028] As noted above, rail 120 is a standard element of the
military firearm 100 and comprises a mounting rail structure (per
standard MIL-STD-1913) having evenly spaced transverse grooves or
troughs of standard size. The picatinny rail is normally used for
attaching a variety of accessories such as lights, grenade
launchers and other devices.
[0029] The bipod mount with integral hand-grip assembly 200
preferably has opposing, separable side walls with one wall defined
by a removable clamp member 217. The opposable walls each have
first and second transversely aligned horizontal fastener openings
through which first and second transverse screws 220, pins or
fasteners are received and attached to the side walls, with the
shank of each transverse fastener 220 extending through the clamp
member 221, to attach the mount to rail 120.
[0030] Once the mount has been slidably captured upon the picatinny
rail of the firearm and clamped in a selected fore/aft position,
the bipod mount with integral hand-grip 200 provides a quick and
easy push-button mechanism 239 permitting the user to deploy the
bipod's legs while providing a support for the forearm stock of the
firearm in a stable, secure selected position. This prevents the
bipod mount and thus the bipod from shifting fore and aft or
wobbling during use.
[0031] FIGS. 5-20 illustrate the bipod mount with integral
hand-grip assembly 200 in greater detail. Each component and
sub-assembly is illustrated in the exploded view of FIG. 10 and the
other figures. Bipod mount with integral hand-grip 200 comprises a
an adapter or clamping subassembly with a rigid clamp housing 221
with downwardly depending spaced trunions that support a bipod leg
retaining lug, axle or hinge pin 203 from which depend left leg
subassembly 207 and right leg subassembly 208. Clamping subassembly
also includes first and second locking lugs 216 and the mounting
clamp 217 which is movable relative to the clamp housing 221, due
to a camming action of the mounting lever 223
[0032] The first and second hex socket head cap screws 220 each
pass through their respective clamp tension screw springs 218 and
horizontal parallel pin 222 bears against the lever's camming
surface. Lever 223 pivots about the axis of vertical parallel pin
224, and hex socket set screw 243, ball 244 and mounting lever
spring 245 all contribute to spring tension keeping the clamp
locked in the closed position.
[0033] Between the bipod legs, a spreading force is provided by
main spring 201 which bears outwardly on the left and right tubular
legs 226.
[0034] The left leg subassembly 207 has an outer grip surface
defined by left side body 209 and includes lock subassembly 205. As
best seen in FIGS. 10 and 14c, lock subassembly 205 comprises an
elongate member called the deployment button 239 which, when
pressed, actuates the pinned closing latch 240 and compresses the
deployment button spring 246 while disengaging the pivoting closing
latch 248 and compressing the pivoting closing latch spring 249
while pivoting about the axis of the parallel pin 250. The shaft or
elongate body of deployment button 239 has a transverse bore sized
to receive actuator pin 251 which carries and moves closing latch
240.
[0035] Left leg subassembly 207 includes a tubular leg 226 which
receives a leg extension 228 terminating distally in left ski foot
234 and retained by leg extension retaining screw 225. The tubular
leg 226 carries a latch pivot pin 227 dimensioned to engage
transverse notches in the leg extension 228 which is biased
distally by leg spring 232. A locking latch spring guide 229 aligns
the top of the locking latch 231 with its locking latch spring
233.
[0036] Similarly, the right leg subassembly 208 has an outer grip
surface defined by right side body 204, and right leg subassembly
208 also includes a tubular leg 226 which receives a leg extension
228 terminating distally in right ski foot 235 and retained by leg
extension retaining screw 225. The tubular leg 226 on the right
also carries a latch pivot pin 227 dimensioned to engage transverse
notches in the leg extension 228 which is biased distally by
another leg spring 232. A locking latch spring guide 229 aligns the
top of the locking latch 231 with its locking latch spring 233.
[0037] The components of bipod mount with integral hand-grip
assembly 200 are fabricated from typical, sturdy materials as used
in modern gunsmithing, including metals such as steel and aluminum
and plastics (e.g., nylon) with fiber reinforcement.
[0038] Right side body 204 and left side body 209 are preferably
made from a tough durable material having a textured,
non-reflective surface, and are made in a mirror-image pair to
close tolerances so that when closed, there is a small and uniform
vertical seam therebetween. Advantageously, when right side body
204 and left side body 209 are in the closed position (e.g., as
shown in FIGS. 1, 6a and 6b) they define a unitary vertical grip
having an almost seamless or continuous exterior circumference.
[0039] In use, as illustrated in FIGS. 1-4, a user first opens the
clamp (as shown in FIG. 4) and then slides bipod mount with
integral hand-grip 200 over a firearm's rail 120, selecting a
fore-aft position before actuating lever 223 to securely engage
bipod mount with integral hand-grip assembly 200 to the rifle
100.
[0040] The user can grasp the continuous exterior circumferential
surface defined by the exterior surfaces of the right side body 204
and left side body 209. When choosing to deploy the bipod, the user
(as shown in FIGS. 2 and 3) depresses actuating button 239, thereby
releasing internal latches 240 and 248, whereupon the biasing
spring forcibly spreads right leg subassembly 208 laterally apart
from left leg subassembly 207, both pivoting about lug or axle 203
to the open position shown in FIG. 2.
[0041] If the bipod is at the desired height, the user can rest the
rifle down on the bipod's distal ends. If, on the other hand, more
height is desired, the user can deploy one or both of the
extendable bipod legs, as shown in FIG. 3, using each leg's locking
latch 231 to releasably set the extended length for either bipod
leg.
[0042] A second embodiment of the bipod mount with integral
hand-grip 300 is illustrated in FIGS. 21-23D, in accordance with
the present invention. The second embodiment of the bipod mount
with integral hand-grip 300 is assembled from a left cover 301, a
right cover 302, an adapter 303, a clamp 304, a lever 305, first
and second parallel hex head cap screws 306 each biased by an
adapter spring 307. The left and right legs are hingedly carried on
pivot pin 308, and right leg assembly 309 includes a leg cap 317
with leg tube 320 which receives a lower leg 319 terminating
distally in a right side metal foot 310.
[0043] Left leg assembly 318 includes a leg cap 317 with leg tube
320 which receives a lower leg 319 terminating distally in a left
side metal foot 327. The leg extension is controlled by left and
right latches or catches 322, and each leg includes a catch spring
323, a catch peg 324, a catch bracket 325, and an extension leg
spring 326.
[0044] The clamping assembly includes a long pin 311, a parallel
pin 312, a first lock or actuator 313, a second lock 314, and a
transverse pin 315 to engage biasing lock spring 316. Clamping
assembly also includes first and second spaced square pins 321,
spline socket button head cap screw 328, and a parallel pin 329.
The bipod's legs are biased outwardly by main spring 330. When
actuating lock 313 is depressed and actuating lock 313 and second
lock 314 each release engagement with notches defined in the left
and right leg covers, the bipod's lags are forced apart.
[0045] FIGS. 21 and 22A-22J show bipod mount with integral
hand-grip 300 with the bipod legs in the concealed or "carry"
position and FIGS. 23A-23D show bipod mount with integral hand-grip
300 with the legs in the opened or supporting position.
[0046] The components of bipod mount with integral hand-grip
assembly 200 are fabricated from typical, sturdy materials as used
in modern gunsmithing, including metals such as steel and aluminum
and plastics (e.g., nylon) with fiber reinforcement.
[0047] Right side cover or body 302 and left side cover or body 301
are also preferably made from a tough durable material having a
textured, non-reflective surface, and are made in a mirror-image
pair to close tolerances so that when closed, there is a small and
uniform vertical seam therebetween. Advantageously, when right side
cover 302 and left cover 301 are in the closed position (e.g., as
shown in FIGS. 22A-J they define a unitary vertical grip having an
almost seamless or continuous exterior circumference.
[0048] In use, user first opens the clamp and then slides bipod
mount with integral hand-grip assembly 300 over a firearm's rail
120, selecting a fore-aft position before actuating lever 305 to
securely engage bipod mount with integral hand-grip 300 to the
rifle 100.
[0049] The user can grasp the continuous exterior circumferential
surface defined by the exterior surfaces of the right side body 302
and left side body 301. When choosing to deploy the bipod, the user
depresses actuator 313, thereby releasing second lock 314,
whereupon the biasing spring 330 forcibly spreads right leg
subassembly 309 laterally apart from left leg subassembly 318, both
pivoting about lug or axle 308 to the open position shown in FIGS.
23A-D.
[0050] If the bipod is at the desired height, the user can rest the
rifle down on the bipod's distal ends. If, on the other hand, more
height is desired, the user can deploy one or both of the
extendable bipod legs, using each leg's locking latch 322 to
releasably set the extended length for either bipod leg.
[0051] It will be understood that while the foregoing relates to a
preferred embodiment of the present invention, various
modifications, additions and changes may be made thereto without
departing from the spirit and scope of the invention, as set forth
in the appended claims.
* * * * *