U.S. patent application number 11/911799 was filed with the patent office on 2008-08-28 for training cartridge, gun barrel insert & assembly.
This patent application is currently assigned to UTM IP Limited. Invention is credited to Michael Ernest Saxby.
Application Number | 20080202009 11/911799 |
Document ID | / |
Family ID | 34685329 |
Filed Date | 2008-08-28 |
United States Patent
Application |
20080202009 |
Kind Code |
A1 |
Saxby; Michael Ernest |
August 28, 2008 |
Training Cartridge, Gun Barrel Insert & Assembly
Abstract
A training cartridge (5) and gun barrel insert (1) assembly,
wherein: a) the training cartridge (5) comprises a sleeve (17)
shaped and configured to fit the breech of a gun and which holds a
primer (21) and bullet (20) assembly; the assembly being located at
the rear portion of the cartridge (5); a channel (22) extending
forward from the bullet (20) and a recessed front channel portion
(4) for receiving the sub-calibre barrel portion (3) of a
corresponding gun barrel insert (1); and b) the corresponding gun
barrel insert (1) comprises a sleeve (2) shaped and configured to
fit at least in part into the barrel (10) of a gun; the sleeve (2)
being located around a sub-calibre barrel (3); wherein the
sub-calibre barrel (3) extends rearward beyond the sleeve (2) in
order to project into the recessed front channel portion (4) of the
corresponding training cartridge (5) .
Inventors: |
Saxby; Michael Ernest;
(Bexhill-on-Sea, GB) |
Correspondence
Address: |
WORKMAN NYDEGGER
60 EAST SOUTH TEMPLE, 1000 EAGLE GATE TOWER
SALT LAKE CITY
UT
84111
US
|
Assignee: |
UTM IP Limited
Mildenhall
GB
|
Family ID: |
34685329 |
Appl. No.: |
11/911799 |
Filed: |
May 8, 2006 |
PCT Filed: |
May 8, 2006 |
PCT NO: |
PCT/GB2006/001680 |
371 Date: |
March 26, 2008 |
Current U.S.
Class: |
42/77 ;
102/444 |
Current CPC
Class: |
F41A 21/10 20130101;
F42B 8/10 20130101 |
Class at
Publication: |
42/77 ;
102/444 |
International
Class: |
F42B 8/10 20060101
F42B008/10; F41A 21/10 20060101 F41A021/10 |
Foreign Application Data
Date |
Code |
Application Number |
May 10, 2005 |
GB |
0509456.0 |
Claims
1-20. (canceled)
21. A training cartridge and gun barrel insert assembly, wherein:
a) said training cartridge comprises a sleeve shaped and configured
to fit the breech of a gun and which holds a primer and bullet
assembly; said assembly being located at the rear portion of the
cartridge; a channel extending forward from said bullet and a
recessed front channel portion for receiving the sub-calibre barrel
portion of a corresponding gun barrel insert; and b) said
corresponding gun barrel insert comprises a sleeve shaped and
configured to fit at least in part into the barrel of a gun; the
sleeve being located around a sub-calibre barrel; wherein the
sub-calibre barrel extends rearward beyond the sleeve in order to
project into said recessed front channel portion of said
corresponding training cartridge.
22. An assembly according to claim 21, wherein the cartridge sleeve
has an outer portion of plastics material and an inner portion of
metallic material holding the primer and bullet.
23. An assembly according to claim 21, wherein both sleeves have
outer portions of plastics material and incorporate inner portions
of metallic material.
24. An assembly according to claim 21, wherein the sub-calibre
barrel extends rearward by a minimum of 10 mm.
25. An assembly according to claim 24, wherein the sub-calibre
barrel extends rearward by approximately 20 mm.
26. A training cartridge comprising a sleeve shaped and configured
to fit the breech of a gun and which holds a primer and bullet
assembly; said assembly being located at the rear portion of the
cartridge; a channel extending forward from said bullet and a
recessed front channel portion for receiving, in use, a
corresponding sub-calibre barrel portion of a gun barrel
insert.
27. A gun barrel insert comprising a sleeve shaped and configured
to fit at least in part into the barrel of a gun; the sleeve being
located around a sub-calibre barrel; wherein the sub-calibre barrel
extends rearward beyond the sleeve in order to project, in use,
into a recessed front channel portion of a corresponding training
cartridge.
Description
FIELD OF THE INVENTION
[0001] The invention relates to training cartridges, gun barrel
inserts and assemblies of training cartridges and gun barrel
inserts.
BACKGROUND TO THE INVENTION
[0002] A wide variety of training cartridges and gun conversions
exists. Some of which may be found in the following prior published
patent documents: GB2353584A, WO00/16032, WO03/102492A1,
WO03/033987A1, EP1255961B1, WO00/25084, WO00/45121 and
WO01/16550A1.
[0003] One of the objects of the present invention is to prevent
the chambering of live shotgun cartridges in training converted
shotguns; to improve safety; and provide a cartridge which will
feed from all types of shotgun magazines. Another objective of the
invention is to also achieve high levels of accuracy whilst
achieving the improvements mentioned above.
SUMMARY OF THE INVENTION
[0004] In a first broad independent aspect, the invention provides
a training cartridge and gun barrel insert assembly, wherein:
[0005] a) said training cartridge comprises a sleeve-shaped and
configured to fit the breech of a gun which holds a primer and
bullet assembly; said assembly being located at the rear portion of
the cartridge; a channel extending forward from said bullet and a
recessed front channel portion for receiving the sub-calibre barrel
portion of a corresponding gun barrel insert; and
[0006] b) said corresponding gun barrel insert comprises a
sleeve-shaped and configured to fit at least in part into the
barrel of a gun; the sleeve being located around a sub-calibre
barrel; wherein the sub-calibre barrel extends rearward beyond the
sleeve in order to project into said recessed front channel portion
of said corresponding training cartridge.
[0007] This configuration is particularly advantageous because it
minimises or does away entirely with the risk of chambering live
shotguns into a gun conversion. It is also particularly beneficial
because it allows the cartridge to feed from all types of shotgun
magazines. It would also allow excellent accuracy to be achieved at
levels essential for training as well as being safe for man on man
training to take place.
[0008] In a subsidiary aspect in accordance with the invention's
first broad independent aspect, the cartridge sleeve has an outer
portion of plastics material and an inner portion of metallic
material holding the primer and bullet.
[0009] One of the advantages of this configuration is that it
allows the metal insert holding the primer and the bullet to be
replaced to allow cartridges to be reloaded.
[0010] In a further subsidiary aspect, both sleeves have outer
portions of plastics material and incorporate inner portions of
metallic material. This configuration also is particularly
advantageous because it allows the sleeves to be accurately formed
to match the breech of a gun whilst retaining the accuracy supplied
by a metallic sub-calibre barrel. Because the sleeves are of
plastic material, these can also be readily coloured for additional
visual safety.
[0011] In a further subsidiary aspect, the sub-calibre barrel
extends rearward by a minimum of 10 mm, this will avoid unsafe
loading and/or detonation occurring.
[0012] In a further subsidiary aspect, the sub-calibre barrel
extends rearward by approximately 20 mm. The safety achieved at
this length of sub-calibre barrel extending rearwards allows an
even further improved safety level to be achieved.
[0013] In a second broad independent aspect, the invention provides
a training cartridge comprising a sleeve-shaped and configured to
fit the breech of a gun and which holds a primer and bullet
assembly; assembly being located at the rear portion of the
cartridge; a channel extending forward from said bullet and a
recessed front channel portion for receiving, in use, a
corresponding sub-calibre barrel portion of a gun barrel
insert.
[0014] This configuration of training cartridge will achieve, in
use, the advantages discussed above with reference to the training
cartridge and gun barrel insert assembly. In summary, it will avoid
live cartridges being inserted into a training barrel with a
corresponding sub-calibre barrel portion. It will allow safe
detonation and will readily be loaded through conventional shotgun
magazines.
[0015] In a third broad independent aspect, the invention provides
a gun barrel insert comprising a sleeve-shaped and configured to
fit, at least in part, into the barrel of a gun; the sleeve being
located around a sub-calibre barrel; wherein the sub-calibre barrel
extends rearward beyond the sleeve in order to project, in use,
into a recessed front channel portion of a corresponding training
cartridge.
[0016] As discussed above, such a gun barrel insert used in
combination with a corresponding training cartridge, will improve
the safety of the operation of a typical shotgun, will achieve the
accuracy necessary for training, particularly in man on man
training situations as well as being particularly adaptable for
fitting into gun barrels.
BRIEF DESCRIPTION OF THE FIGURES
[0017] FIG. 1 shows a cross-sectional view of a gun barrel
insert.
[0018] FIG. 2 shows a cross-sectional view of a training
cartridge.
[0019] FIG. 3 shows a cross-sectional view of a breech body.
[0020] FIG. 4 shows the assembly of a gun barrel insert located in
the breech body of a gun.
[0021] FIG. 5 shows a cross-sectional view of a training cartridge
and gun barrel insert assembly located in the breech of a gun.
DETAILED DESCRIPTION OF THE FIGURES
[0022] FIG. 1 shows a gun barrel insert generally referenced 1 with
a sleeve 2 shaped and configured to fit at least in part to the
barrel of a gun such as that shown on FIG. 3. In this configuration
the sleeve is located around a sub-calibre barrel 3 which extends
rearward beyond the sleeve in order to project, when operating in
conjunction with a training cartridge 5, into a recessed front
channel portion 4 of the training cartridge. The front of the
insert 1 comprises an annular recess 6 which accommodates a rubber
seal ring 7. The insert comprises a first diameter 8 which will
correspond to diameter 9 of the barrel 10 shown on FIG. 3. The
insert sleeve then incorporates a tapered section 11 corresponding
to tapered section 12 of barrel 10. The sleeve then incorporates a
diameter 13 at its rear most portion corresponding to the diameter
14 of the breech.
[0023] The sleeve 2 will preferably be constructed from plastics
material whilst the sub-calibre barrel 3 will be constructed from
metallic material such as steel. The sub-calibre barrel portion
incorporates a bore 14 extending lengthways through the portion.
The portion of the sleeve which does not cover the sub-calibre
portion also incorporates a bore 15 allowing the passage of a
bullet through the insert. The sub-calibre barrel portion of a
metallic material extends over approximately less than half the
length of the sleeve 2 and protrudes by approximately 20 mm in the
rear portion of the insert.
[0024] FIG. 2 shows a training cartridge 5 with a sleeve 17 shaped
and configured to fit the breech of a gun. In its rear most
extremity, sleeve 17 holds a primer and bullet assembly 18 formed
with an outer sleeve 19 for holding both the bullet 20 and the
primer 21. Following detonation, the bullet will exit the training
cartridge through a bore 22 forming a channel. Recess 4 will
accommodate the sub-calibre barrel portion which protrudes from the
sleeve. Recess 4 tapers inwardly and gradually converges towards
the diameter of bore 22. The recess incorporates a flange 23
against which the rear most extremity 24 of the gun barrel insert 1
will abut when the sub-calibre barrel portion is inserted into
recess 4.
[0025] Sleeve 17, in a similar fashion to sleeve 2 of FIG. 1, is
preferably of plastics material in order to allow bullet and primer
assembly 18 to be changed after use.
[0026] The diameter of sleeve 17 is chosen to closely match the
diameter 14 of the breech. A flange 25 allows the cartridge to abut
against the breech in a conventional fashion.
[0027] FIG. 4 shows gun barrel insert 1 snugly located into the
breech/barrel of a gun.
[0028] Once the gun barrel insert is located as in FIG. 4 it may
then receive a training cartridge 5 which will form the assembly as
shown in FIG. 5.
* * * * *