U.S. patent application number 13/736113 was filed with the patent office on 2014-07-10 for shotgun magazine receiver assembly.
The applicant listed for this patent is Eric Lemoine. Invention is credited to Eric Lemoine.
Application Number | 20140190052 13/736113 |
Document ID | / |
Family ID | 50943906 |
Filed Date | 2014-07-10 |
United States Patent
Application |
20140190052 |
Kind Code |
A1 |
Lemoine; Eric |
July 10, 2014 |
SHOTGUN MAGAZINE RECEIVER ASSEMBLY
Abstract
A shotgun magazine receiver assembly includes an elongated
receiver body having a trigger assembly opening, a removable
magazine opening, a shotgun barrel opening, a shell ramp and a bolt
and slide. The bolt and slide are positioned to align with the
center of the barrel opening and to engage a removable box-style
shotgun shell magazine. The assembly further includes a plurality
of connectors to secure the assembly to the stock barrel, grip,
trigger assembly, and magazine tube of the conventional
shotgun.
Inventors: |
Lemoine; Eric; (Winter
Garden, FL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Lemoine; Eric |
Winter Garden |
FL |
US |
|
|
Family ID: |
50943906 |
Appl. No.: |
13/736113 |
Filed: |
January 8, 2013 |
Current U.S.
Class: |
42/6 |
Current CPC
Class: |
F41A 3/66 20130101; F41A
9/65 20130101; F41C 7/02 20130101 |
Class at
Publication: |
42/6 |
International
Class: |
F41A 3/66 20060101
F41A003/66 |
Claims
1. A shotgun magazine receiver assembly for converting a
conventional shotgun having a trigger assembly and barrel into a
magazine loaded shotgun, said receiver assembly comprising: an
elongated receiver body having a front end, a back end, a top
surface, a bottom surface, and a pair of opposing side surfaces
defining an interior space, each of the opposing side surfaces
including an elongated channel disposed along an inside portion
thereof, and arranged in a generally parallel orientation to each
other; at least one connector disposed along the receiver body,
said at least one connector having a location that is suitable for
mating with a complementary connector disposed on the conventional
shotgun; a shotgun barrel opening disposed along the first end of
the receiver body; a trigger assembly opening disposed along the
bottom side of the receiver body, each of the shotgun barrel
opening, and trigger assembly opening including a dimension
suitable for receiving a conventional shotgun barrel, and trigger
assembly, respectively; a magazine opening disposed along the
bottom side of the receiver body at a location adjacent to the
front end of the receiver body, said magazine opening being
configured to receive a removable shotgun shell magazine; a bolt
having a font end, a rear end, a top surface, a bottom surface and
a pair of side walls defining a firing pin chamber; a firing pin
disposed within the chamber; a lock stop opening extending from the
top surface of the bolt to the bottom surface of the bolt; an
extractor arm recess located along each side wall of the bolt and
adjacent to the front wall; and a spring groove disposed along one
of the side walls of the bolt, each of the extractor arm recesses
and spring groove being configured to communicate with a
conventional shotgun extractor arm and spring, respectively.
2. The shotgun magazine receiver assembly of claim 1, further
comprising: a shell ramp having an angled surface, said shell ramp
being interposed between the barrel opening and the removable
magazine opening along the front end of the receiver main body
within the interior space, said shell ramp being configured to
direct a shotgun shell from an inserted removable magazine into the
shotgun barrel.
3. (canceled)
4. The shotgun magazine receiver assembly of claim 1, further
comprising: a slide having a front wall, a rear wall, a generally
flat top surface and a pair of opposing side surfaces; an
indentation disposed along the rear wall, said indentation being
configured to communicate with the conventional shotgun trigger
assembly; a pair of elongated slide guides disposed on the side
surfaces, each of the guides being configured to slide within the
elongated channels of the receiver main body; a lock stop disposed
along the top surface of the slide, said lock stop being configured
to be positioned within the lock stop opening of the bolt; and a
pair of elongated fingers configured to engage an inserted
removable shotgun magazine, and to remove a shotgun shell
therefrom.
5. The shotgun magazine receiver assembly of claim 4, wherein the
bolt and slide are removably secured within the main receiver body
so as to align the firing pin longitudinally with a center of the
barrel opening, and the slide is positioned above the removable
magazine opening.
6. The shotgun magazine receiver assembly of claim 5, wherein the
bolt and slide are configured to engage the conventional trigger
assembly, and an inserted removable shotgun magazine.
7. The shotgun magazine receiver assembly of claim 1, further
comprising: a spring actuated lever disposed along the bottom side
of the receiver body at a location between the trigger assembly
opening, and the removable magazine opening, said lever being
configured to secure a removable magazine within the magazine
opening.
8. The shotgun magazine receiver assembly of claim 1, further
comprising: a threaded tube magazine opening disposed along the
first end of the receiver body, said tube magazine opening being
positioned beneath the barrel opening and configured to receive a
conventional shotgun tube magazine.
9. The shotgun magazine receiver assembly of claim 1, further
comprising: an ejector port disposed along one of the opposing side
walls of the receiver body.
10. The shotgun magazine receiver assembly of claim 1, wherein the
back end of the receiver body is configured to receive at least one
of a conventional shotgun grip and a stock.
11. The shotgun magazine receiver assembly of claim 1, wherein a
conventional shotgun comprises a pump action shotgun.
12. The shotgun magazine receiver assembly of claim 1, wherein a
conventional shotgun comprises a semi-automatic shotgun.
13. The shotgun magazine receiver assembly of claim 1, further
comprising: a removable shotgun magazine.
Description
TECHNICAL FIELD
[0001] The present invention relates generally to shotguns and,
more particularly to a retrofit magazine receiver for use with a
conventional shotgun.
BACKGROUND
[0002] The statements in this section merely provide background
information related to the present disclosure and may not
constitute prior art.
[0003] FIGS. 1 and 2 illustrate one embodiment of a conventional
pump-action shotgun that is useful for understanding the inventive
concepts disclosed herein. As shown, the conventional shotgun 1
typically includes an elongated fixed magazine tube 2 that is
mounted below the gun barrel 3. The tube and barrel are secured to
a receiver 4 that houses a trigger assembly 5, a bolt 6 and a bolt
slide 7. A grip 8 and forearm handle 9 are also provided.
[0004] The fixed magazine tube holds about five shells or
cartridges (not illustrated) which are loaded individually into the
magazine via the shell opening 4a. After firing each round, the
user must pump the forearm 9 to chamber the next round into the
receiver 4 for firing. After all of the shells are fired, the next
round of shells are loaded one at a time into the fixed tubular
magazine, and the above process is repeated.
[0005] Although rapid firing and reloading capabilities have been
achieved with some small firearms, such as assault rifles and
pistols, they have not yet been satisfactorily achieved with
shotguns.
[0006] Moreover, many firearm owners routinely modify their weapons
to suit a particular interest, look, or to accomplish a desired
function. Owing to the extremely durable nature of shotguns in
particular, many shotgun owners often choose to upgrade their
existing weapons with new stocks and barrels as opposed to
purchasing a new weapon. Accordingly, it would be beneficial to
provide a shotgun magazine receiver assembly which can replace the
stock receiver of an existing shotgun to allow a user to rapidly
fire and reload ammunition via a removable "box" style magazine.
Such a feature would be particularly beneficial for police and
military applications, where the time necessary to reload a weapon
can mean the difference between life and death.
SUMMARY OF THE INVENTION
[0007] The present invention is directed to a shotgun magazine
receiver assembly. One embodiment of the present invention can
include a receiver body capable of replacing a stock receiver body
of a conventional shotgun. The assembly includes a bolt and slide
which act to mate with the stock shotgun components in order to
engage and fire cartridges supplied from a box-style removable
magazine.
[0008] As the present invention is designed to be incorporated into
existing shotguns, the main body can include a plurality of
connectors for engaging the stock barrel, grip, trigger assembly,
and magazine tube.
[0009] This summary is provided merely to introduce certain
concepts and not to identify key or essential features of the
claimed subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Presently preferred embodiments are shown in the drawings.
It should be appreciated, however, that the invention is not
limited to the precise arrangements and instrumentalities
shown.
[0011] FIG. 1 is a side view of a shotgun in accordance with
background art.
[0012] FIG. 2 is an exploded parts view of a shotgun in accordance
with background art.
[0013] FIG. 3a is a side view of the receiver body of the assembly
in accordance with one embodiment of the invention.
[0014] FIG. 3b is a perspective view of a shell ramp of the
assembly in accordance with one embodiment of the invention.
[0015] FIG. 3c is a side elevation view of the receiver body with
portions broken away in accordance with one embodiment of the
invention.
[0016] FIG. 3d is a bottom side view of the receiver body of the
assembly in accordance with one embodiment of the invention.
[0017] FIG. 4a is a perspective view of the bolt of the assembly in
accordance with one embodiment of the invention.
[0018] FIG. 4b is another perspective view of the bolt of the
assembly in accordance with one embodiment of the invention.
[0019] FIG. 5 is a perspective view of the slide of the assembly in
accordance with one embodiment of the invention.
[0020] FIG. 6a is a perspective view of the assembled bolt and
slide of the assembly in accordance with one embodiment of the
invention.
[0021] FIG. 6b is a side view of the assembled bolt and slide of
the assembly in accordance with one embodiment of the
invention.
[0022] FIG. 7 is a side elevation view of the shotgun magazine
receiver assembly with portions broken away in accordance with one
embodiment of the invention.
[0023] FIG. 8 is perspective view of the shotgun magazine receiver
assembly in operation, with conventional shotgun components.
[0024] FIG. 9 is a side view of a shotgun employing the shotgun
magazine receiver assembly, in accordance with one embodiment of
the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0025] While the specification concludes with claims defining the
features of the invention that are regarded as novel, it is
believed that the invention will be better understood from a
consideration of the description in conjunction with the drawings.
As required, detailed embodiments of the present invention are
disclosed herein; however, it is to be understood that the
disclosed embodiments are merely exemplary of the invention which
can be embodied in various forms. Therefore, specific structural
and functional details disclosed herein are not to be interpreted
as limiting, but merely as a basis for the claims and as a
representative basis for teaching one skilled in the art to
variously employ the inventive arrangements in virtually any
appropriately detailed structure. Further, the terms and phrases
used herein are not intended to be limiting but rather to provide
an understandable description of the invention.
[0026] Identical reference numerals are used for like elements of
the invention or elements of like function. For the sake of
clarity, only those reference numerals are shown in the individual
figures which are necessary for the description of the respective
figure. For purposes of this description, the terms "upper,"
"bottom," "right," "left," "front," "vertical," "horizontal," and
derivatives thereof shall relate to the invention as oriented in
FIG. 7.
[0027] As described herein, the term "shotgun" can refer to
virtually any type and manufacturer of semi-automatic and/or
shotguns. As will be described below, the present invention
includes a shotgun magazine receiver assembly which can act as a
retrofit kit for existing shotguns. Although illustrated in use
with a MOSSBERG 500 shotgun, it is to be distinctly understood that
the present invention has broader applications, and is equally
applicable for use on many other shotguns without undue
experimentation and without departing from the invention claimed.
Several non-limiting examples include the MOSSBERG 590, MAVERICK
88, REMINGTON 870, REMINGTON 1100, MOSSBERG 930, BENELLI M4, and
the WINCHESTER 1300, for example. Accordingly, the presently
claimed invention is not to be construed as limiting. Additionally,
it is noted that several stock shotgun components are omitted from
the illustrations for the sake of clarity. The basic operation of a
shotgun, and the various firing components necessary for performing
the same are well known in the art, and are not repeated
herein.
[0028] In one preferred embodiment, the term "removable magazine"
can refer to the SAIGA 12 box-style magazine commercially available
from SAIGA. However, it is to be distinctly understood that the
present invention has broader applications, and is equally
applicable for use with any number of other commercially available
shotgun magazines without undue experimentation and without
departing from the invention claimed. One non-limiting example of a
suitable removable magazine which can be utilized in conjunction
with the shotgun magazine receiver assembly is described in U.S.
Patent Publication No. 2012-0066950, to Davidson, the contents of
which are incorporated herein by reference.
[0029] FIGS. 3-8 illustrate various components and embodiments of a
shotgun magazine receiver assembly that is useful for understanding
the inventive concepts disclosed herein. The device assembly 10 can
function to replace the traditional receiver 4, bolt 6 and slide 7
of a conventional shotgun 1 and to mate with all other factory
supplied components so as to enable the conventional shotgun to
utilize a box-style removable magazine.
[0030] The receiver body 30 can function to replace the stock
receiver of a shotgun to which the assembly will be installed. As
shown in FIGS. 3a, 3c and 3d, the receiver body 30 can include an
elongated generally hollow member having a front end 31a, a back
end 31b, and a pair of opposing, generally parallel side walls 31c
and 31d that are joined together by a top wall 31e.
[0031] Any number of connectors C such as through holes and/or
threaded openings, for example, can be disposed along the receiver
body at locations identical to those found on the stock receiver 4
in which the new receiver body 30 is replacing. These connectors C
acting to allow the receiver body 30 to mate with the complementary
connectors C' located on the stock grip 8, trigger assembly 5 and
other components (See FIG. 7) in a traditional manner utilizing
conventional manufacture supplied hardware such as screws and
bolts, for example.
[0032] A pair of circular openings 32 and 33 are disposed along the
front end of the receiver body. The openings 32 and 33 including a
dimension suitable for receiving the stock barrel 3 and tube
magazine 2, respectively of the shotgun 1 to which the assembly is
being secured. Opening 33 can further include a plurality of
threaded elements 33a corresponding to the threads 2a on the
magazine tube, so as to allow the magazine tube to be secured onto
the new assembly 30 via a twisting motion.
[0033] An ejector port 34 is disposed along one of the opposing
side walls 31c. As will be described below, the ejector port 34
includes a location on the receiver body, and a dimension suitable
to allow spent cartridges 71 to be ejected from the bolt 41 in a
conventional manner.
[0034] FIG. 3b illustrates a shell ramp 20 that includes a
generally U-shaped flat member having a forward facing surface 21a,
a rear facing surface 21b, and a pair of opposing side surfaces 21c
and 21d. Surfaces 21a, 21c and 21d including a dimension suitable
for being secured within the receiver body at a location abutting
receiver body segments 31a, 31c and 31d, respectively. The shell
ramp 20 also including a pair of spaced vertical ramps, each having
a flat forward surface 22a and an angled rear surface 22b.
[0035] As shown in FIG. 3c, the ramp 20 can be positioned within
the receiver body to ensure the uppermost portion of the vertical
protrusions are aligned with the lowermost portion of the shotgun
barrel opening 32. Such a feature can allow the device 20 to act as
a guide for the final shell in a magazine to ensure that the last
shell slides into the barrel properly.
[0036] A pair of elongated generally parallel channels 38 can be
formed along the inside portion of each of the receiver side walls
31c and 31d. As will be described below, each of the channels 38
can include a dimension suitable for receiving the slide guides 53
of the slide mechanism in order to allow the slide to function in a
controlled and linear manner.
[0037] As shown best in FIG. 3d, the bottom side of the receiver
main body 31 includes an open construction so as to allow access to
the generally hollow interior space defined by the top and side
walls. A bracket 35 is cross mounted between the lowermost edges of
the opposing side walls 31c and 31d and functions to segment the
hollow space into a pair of separate openings identified as a
trigger assembly opening 36 and a magazine opening 37.
[0038] The trigger assembly opening 36 can act to receive the stock
trigger assembly 5 for use with the present invention. To this end,
the trigger assembly opening 36 can include any number of ridges
and grooves within the inside facing portion of side walls 31c and
31d to form a shape and dimension that is complementary to the
physical shape and dimension of the stock shotgun trigger assembly
5.
[0039] The magazine opening 37 (i.e., magwell) can act to receive a
removable magazine 70 (see FIG. 7) that can be positioned so as to
communicate with the bolt 40 and slide 50 described below. To this
end, the magazine opening 37 can also include any number of ridges
and grooves within the inside facing portion of side walls 31c and
31d to form a shape and dimension that is complementary to the
physical shape and dimension of the removable magazine 70.
Additionally, the bracket 35 can further include a spring mounted
pivotally actuated latch 35a which can act to receive and lock the
upper lip of the removable magazine into the magazine opening
37.
[0040] The below described bolt 40 and slide 50 can function
together to receive a shell/cartridge 71 from an inserted removable
magazine 70, and to position the same within the stock shotgun
barrel 3 for firing.
[0041] FIGS. 4a and 4b illustrate one embodiment of the bolt 40
that can be included in the shotgun magazine receiver assembly 10.
As shown, the bolt can include a main body having a front wall 41a,
a rear wall 41b, a top surface 41c, a bottom surface 41d and a pair
of opposing side walls 41e and 41f, each defining an elongated
chamber for housing a firing pin 46. A generally rectangular shaped
protrusion 42 is formed along a portion of the bottom surface 41d
of the bolt. The protrusion having a length that is less than the
distance between the front wall 41a and the rear wall 41b so as to
allow each of the front and rear walls to extend outward therefrom
in a longitudinal manner.
[0042] An opening 43 extends from the top surface 41c through the
bottom surface 41d for accessing the firing pin and the lock stop
of the receiver. As shown, each of the front and rear walls 41a and
41b also include openings 44a and 44b, respectively. Opening 44b
being used to receive the firing pin 46, and opening 44a being used
to allow the end of the firing pin 46 to make contact with a
shotgun cartridge.
[0043] Each side of the bolt main body 41e and 41f can further
include an extractor arm recess 45 located adjacent to the front
wall 41a. Additionally, side wall 41e can further include an
elongated spring groove 47 that extends from the front wall 41a to
the rear wall 41b. The extractor arm recesses 45 and spring groove
47 providing a connection point with the manufacturer supplied
extractor arms and spring (not shown), respectively, of the shotgun
1.
[0044] FIG. 5 illustrates one embodiment of the slide 50 that can
be included in the shotgun magazine receiver assembly 10.
[0045] The slide 50 can include an elongated member having a front
wall 51a, a rear wall 51b, a generally flat top surface 51c, a
bottom surface 51d and a pair of opposing side walls 51e and 51f. A
trigger assembly indentation 52 is provided along the rear wall 51b
to accommodate the stock hammer and trigger assembly 5 in order to
allow the bolt and slide to function in a conventional manner.
[0046] One or more elongated protruding slide guides 53 can be
disposed on each of the side surfaces 51e and 51f. Each of the
guides 53 can be secured within the slide channel 38 of the
receiver body 30, in order to allow the slide to move in a
straight, controlled and linear fashion.
[0047] An upward radiating lock stop 54 is positioned along the top
surface 51c of the slide. The lock stop includes a dimension
suitable for being housed within the opening 43 of the bolt and
further includes a first end 54a that extends beyond the front wall
51a of the slide. The second end 54b of the lock stop includes a
curved surface that functions to interact with the factory supplied
shotgun lock (not shown).
[0048] A pair of generally parallel fingers 55 extend
longitudinally from the front wall of the slide 51a. Upon movement
of the slide, each of the shafts makes contact with the back side
of a shell and removes the same from a removable magazine that is
secured within the receiver body 30.
[0049] As described herein, each of the receiver body 30, bolt 40
and slide 50 can preferably be constructed from a durable metallic
material such as steel, for example, capable of withstanding the
rigors of repeated use with shotgun shells. Of course, any number
of other suitable and conventional materials can also be
utilized.
[0050] FIGS. 6a and 6b illustrate one embodiment wherein the bolt
40 and slide 50 are joined. As shown, the bottom surface of the
bolt 41d can be positioned above the upper surface of the slide
51c, and the bolt can be lowered onto the slide. When so
positioned, the lock stop 54 will be located within the opening
43.
[0051] FIG. 7 illustrates one non-limiting embodiment of the
shotgun receiver assembly 10 wherein the bolt 40 and slide 50 are
secured within the main receiver body 30 so as to align the bolt 40
and the firing pin 46 longitudinally with the center of the barrel
opening 32. The slide 50 is positioned above the magazine opening
37 in order to allow the fingers 55 to remove shells from an
inserted removable magazine.
[0052] As shown in FIGS. 8 and 9, the shotgun receiver assembly 10
can be mated with all remaining stock components of the
conventional shotgun necessary for proper operation, such as the
handle 8, trigger assembly 5, shotgun barrel 3, tubular magazine 2
and the pump action handle 9, for example.
[0053] The following non-limiting example will illustrate the
specific functionality of the shotgun magazine receiver assembly 10
in operation with the stock components of the conventional
shotgun.
[0054] The stock shotgun handle 9 can act to open the bolt 40 so as
to expose the interior of the receiver body. Although not
illustrated, an optional charge handle can be provided to allow
opening of the bolt when utilized with semi-automatic shotguns.
Once the bolt is open, the removable magazine 70 can be inserted
into the magwell 37 wherein the latch 35a captures the lip of the
magazine. Push the pump handle forward to close the bolt 40. As the
slide 50 pushes forward, it carries the bolt 40 with it to meet
with the stock barrel 3. The fingers 55 on the slide 50 make
contact with the next eligible round 71 in the magazine 70 by way
of pushing on the top portion of the brass. The shell 71 slides out
of the magazine, enabling the next shell to take its place. As a
consequence, the shell pushed from the magazine is pushed
vertically into alignment with the shotgun breech 3a. As the bolt
40 and slide 50 move forward to completion, the shell 71 is pushed
into the breech 3a and the weapon is ready to fire.
[0055] As the trigger of the trigger assembly 5 is pulled, the
trigger assembly hammer (not illustrated) is released and flies
forward and strikes the firing pin 46. The firing pin 46 then
extends from the front wall of the bolt 41a, makes contact with the
shell charge and fires the shell. After the shell is fired, the
pump handle 9 is manipulated back towards the receiver. (If semi
auto, this is done automatically). The stock shotgun shell
extractors (not shown) pinned to the bolt 40 will act to pull the
spent shell casing towards the back wall of the receiver and out of
the barrel breech 3a. As the bolt 40 slides backwards on the slide
50, the stock shotgun extractor spring snaps into position along
the spring groove 47, thereby pushing the spent shell out through
the receiver ejector port 34. Manipulate the pump handle forward
and way from the receiver 30 to lead the next shell. (If the
shotgun is semi auto, this is done automatically). If the next
shell is the final shell in the magazine, the slide 50 pushes the
shell out of the magazine as described above. The front portion of
the shell slides up the last shell ramp 20 that is attached to the
interior of the receiver and into the barrel breech 3a. In this
way, the feed ramp 20 acts to align the shell to the breech opening
of the barrel.
[0056] Accordingly, the shotgun magazine receiver assembly 10
functions to convert a conventional shotgun to accept and fire a
box-style removable magazine in a novel manner.
[0057] As described herein, one or more elements of the shotgun
magazine receiver assembly 10 can be secured together utilizing any
number of known attachment means such as, for example, screws,
glue, compression fittings and welds, among others. Moreover,
although the above embodiments have been described as including
separate individual elements, the inventive concepts disclosed
herein are not so limiting. To this end, one of skill in the art
will recognize that one or more of the individually identified
elements may be formed together as one continuous element, either
through manufacturing processes, such as welding, casting, or
molding, or through the use of a singular piece of material milled
or machined with the aforementioned components forming identifiable
sections thereof.
[0058] As to a further description of the manner and use of the
present invention, the same should be apparent from the above
description. Accordingly, no further discussion relating to the
manner of usage and operation will be provided.
[0059] The terminology used herein is for the purpose of describing
particular embodiments only and is not intended to be limiting of
the invention. As used herein, the singular forms "a," "an," and
"the" are intended to include the plural forms as well, unless the
context clearly indicates otherwise. It will be further understood
that the terms "comprises" and/or "comprising," when used in this
specification, specify the presence of stated features, integers,
steps, operations, elements, and/or components, but do not preclude
the presence or addition of one or more other features, integers,
steps, operations, elements, components, and/or groups thereof.
[0060] The corresponding structures, materials, acts, and
equivalents of all means or step plus function elements in the
claims below are intended to include any structure, material, or
act for performing the function in combination with other claimed
elements as specifically claimed. The description of the present
invention has been presented for purposes of illustration and
description, but is not intended to be exhaustive or limited to the
invention in the form disclosed. Many modifications and variations
will be apparent to those of ordinary skill in the art without
departing from the scope and spirit of the invention. The
embodiment was chosen and described in order to best explain the
principles of the invention and the practical application, and to
enable others of ordinary skill in the art to understand the
invention for various embodiments with various modifications as are
suited to the particular use contemplated.
* * * * *