U.S. patent application number 09/780749 was filed with the patent office on 2002-08-22 for muzzle brake.
Invention is credited to Champion, Edwin J..
Application Number | 20020112602 09/780749 |
Document ID | / |
Family ID | 25120560 |
Filed Date | 2002-08-22 |
United States Patent
Application |
20020112602 |
Kind Code |
A1 |
Champion, Edwin J. |
August 22, 2002 |
MUZZLE BRAKE
Abstract
An assemblage of members held in a sleeve form a series of
plenums which each have a reaction wall surface against which
propulsion gasses generate anti recoil forces. Vents from the
plenums direct propulsion gasses upwardly and outwardly to further
counter recoil forces.
Inventors: |
Champion, Edwin J.; (Tempe,
AZ) |
Correspondence
Address: |
WILLIAM J. FOLEY
CAHILL, SUTTON & THOMAS P.L.C.
155 Park One
2141 E. Highland Avenue
Phoenix
AZ
85016
US
|
Family ID: |
25120560 |
Appl. No.: |
09/780749 |
Filed: |
February 9, 2001 |
Current U.S.
Class: |
89/14.3 |
Current CPC
Class: |
F41A 21/30 20130101;
F41A 21/36 20130101 |
Class at
Publication: |
89/14.3 |
International
Class: |
F41A 021/00 |
Claims
What is claimed is:
1. A gun nozzle brake having an axis and a rear or muzzle end and a
forward or exit end, said muzzle brake being adapted to be affixed
to a muzzle of a gun barrel as a coaxial extension thereof
comprising an assemblage of plenum forming members each having a
forward face and rear face and being assembled with the forward
face of one member in contact with the rear face of an adjoining
member, each such member further having: a) an axial bore
therethrough; b) a conical-like recess in the forward face thereof;
and c) a conical-like projection on the rear face thereof; the
conical-like recess in one member receiving the conical-like
projection of an adjoining member whereby an annular plenum is
provided between the recess and the projection of each pair of
adjoining members; each such plenum being open at its inner end to
the bore through the members for admitting gasses passing through
the bore and being defined at its outer end by a reaction wall
surface on the rear surface of the adjoining member; d) and said
members are further configured to provide a vent for gasses in each
plenum.
2. The nozzle brake of claim 1 further characterized in that the
assemblage of plenum forming members has an upper region and a
lower region and said members are configured to provide the vents
primarily in the upper region of the assemblage.
3. The nozzle brake of claim 1 further comprising an elongated
sleeve having openings in the wall thereof and said assemblage of
plenum forming members is disposed in the sleeve.
4. The nozzle brake of claim 3 wherein the openings in the wall of
said sleeve are slots extending longitudinally of the sleeve.
5. The nozzle brake of claim 1 further characterized in that said
plenum forming members have a cylindrical external
configuration.
6. The nozzle brake of claim 5 further comprising an elongated
cylindrical sleeve having openings in the wall thereof and said
assemblage of plenum forming members is disposed in the sleeve.
7. The nozzle brake of claim 1 further comprising interlocking
means at the faces of said plenum forming members for preventing
relative rotational movement of adjoining members about the bore
axis.
8. The nozzle brake of claim 5 further comprising interlocking
means at the faces of said plenum forming members for preventing
relative rotational movement of adjoining members about the bore
axis.
9. The nozzle brake of claim 6 further comprising interlocking
means at the faces of said plenum members for preventing relative
rotational movement of adjoining members about the bore axis.
10. The nozzle brake of claim 2 further characterized in that said
reaction wall surface has a greater area in the upper region of the
members than in the lower region of the members.
11. The nozzle brake of claim 1 further comprising a nose piece at
the forward end of the brake and having a pair of expansion
chambers therein.
Description
Technical Field
[0001] This invention relates to an improved muzzle brake for
attachment to the muzzle of a gun.
Background Art
[0002] The recoil of a gun severely interferes with the accuracy of
firing at a target. A hand-held gun, such as a rifle, will tend to
kick up and often to one side causing the gun to walk up and away
from the target.
[0003] The recoil problem is particularly acute with fully
automatic weapons, such as the Army's M14 rifle. As a consequence
the United States military has virtually discontinued use of that
weapon in favor of smaller caliber rifles in spite of the latter
exhibiting lesser firepower.
[0004] In the past muzzle brakes have been designed to a variety of
configurations. Representative of these are the muzzle brakes
disclosed in the following United States patents: U.S. Pat. No.
1,333,402 granted to N. J. A. Galliot et al on Mar. 9, 1920 for
"Arrangement for Deadening the Recoil of Firearms and the Like";
U.S. Pat. No. 2,567,826 granted to J. E. Prache on Sep. 11, 1951
for "Muzzle Recoil Check for Firearms"; U.S. Pat. No. 5,036,747
granted to H. T. McClain III on Aug. 6, 1991 for "Muzzle Brake";
and U.S. Pat. No. 5,476,028 granted to 0. P. Seberger on Dec. 19,
1995 for "Gun Muzzle Brake". As with many other brakes, recoil is
reduced with these brakes by directing the propulsion gasses
rearwardly from the brake and back into the face of the user of the
weapon and nearby companions. This phenomenon can be characterized
as "back blast". They also offer the disadvantage of presenting a
large and highly visible flash signature for the weapon. Further,
these prior brakes do very little by way of suppressing the noise
signature of the weapon. All of these features are of considerable
importance to the military.
SUMMARY OF THE INVENTION
[0005] Unlike the prior brakes mentioned above, in the brake of
this invention the anti recoil forces are generated in a series of
lengthy plenums having reaction wall surfaces therein. A nose piece
having additional reaction surfaces therein generates additional
anti recoil forces.
[0006] The plenums are provided by an assemblage of plenum forming
members each having a forward face and a rear face and an axial
bore therethrough. Each member has a conical-like recess in the
forward face thereof and a conical-like projection on the rear face
thereof. The members are assembled with the forward face of one
member in contact with the rear face of an adjoining member whereby
the recess in one member receives the projection of an adjoining
member. Thus, there is created between adjoining members a
generally annular plenum which is open at its inner end to the bore
through the members for admitting propulsion gasses passing through
the bore. Each plenum is further defined as its outer end by a
reaction wall surface on the rear surface of an adjoining member.
And finally the members are further configured to provide a vent
for each plenum, preferably primarily in the upper region of the
assemblage of members.
[0007] In addition to generating anti recoil forces the plenums
contain the propulsion gasses for a sufficient period to allow
substantially complete powder bum thereby reducing the flash
signature of the weapon. The same is also true of the nose piece.
Because of the confinement of the propulsion gasses, albeit for a
limited period, the explosion sound leaving the brake is suppressed
thereby reducing the noise signature of the weapon.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The invention is described in greater detail hereafter by
reference to the accompanying drawing wherein:
[0009] FIG. 1 is a perspective view of a nozzle brake embodying the
invention;
[0010] FIG. 2 is a vertical sectional view through an assemblage of
plenum forming members in the brake;
[0011] FIG. 3 is an exploded view of the brake with portions broken
away;
[0012] FIG. 4 is an enlarged perspective view of one of the plenum
forming members in the brake;
[0013] FIG. 5 is a sectional view of a sleeve for holding the
plenum forming members taken as indicated by line 5-5 in FIG. 3;
and
[0014] FIG. 6 is a sectional view of the nose piece of the
brake.
BEST MODES FOR CARRYING OUT THE INVENTION
[0015] The nozzle brake of this invention is designated generally
by reference numeral 11. The brake comprises a sleeve 12 which
houses an assemblage 13 of plenum forming members 14, 15, 16, 17
and 18. All of the plenum forming members have an axial bore 19
therethrough for passage of a projectile (not shown) and propulsion
gasses.
[0016] Rearmost plenum forming member 14 has a threaded rear
projection 21 which extends through an opening in the rear end wall
22 of sleeve 12. Projection 21 is adapted to be screwed onto a
threaded muzzle (not shown) of a weapon, such as a rifle. Member 14
of the assemblage 13 has a conical-like recess 23 in its forward
face.
[0017] Assemblage member 15 has a conical-like projection 24 on its
rear wall and that projection is received in the recess 23 in
member 14. Recess 23 and projection 24 form therebetween an annular
plenum, or chamber, 25 which is open at its inner end to the bore
19 for admitting propulsion gasses passing through the bore into
the plenum. The outer, or forward end of the plenum 25 terminates
in an annular recess 26 in the rear face of member 15 which
provides a reaction wall surface 27. Propulsion gasses striking the
reaction wall surface 27 generate anti recoil forces.
[0018] The reaction wall surface 27 for each of the plenum forming
members 15, 16, 17 and 18 has a larger area across the top of the
member than across the bottom of the member. It is believed that
this greater area generates greater reaction forces in the upper
portion of the brake, which forces tend to hold the brake and
weapon down.
[0019] A vent slot, or gap, 28 is provided between adjoining
surfaces of plenum forming members 14 and 15. The vent slot 28
extends approximately 180.degree. around the upper region of the
assemblage 13. Thus gasses exiting plenum 25 through the vent slot
28 are directed upwardly and outwardly from the brake 11 generating
additional reaction forces opposing the recoil force tending to
walk the muzzle of the weapon upwardly and to the side.
[0020] This configuration between adjoining members 15, 16, 17 and
18 is continued throughout the assemblage 13 so that a series of
plenums 25 are provided along the assemblage. As many plenum
forming members may be employed as are required to generate the
desired anti recoil forces.
[0021] It is to be noted that the plenums 25 are elongated and
rather confined with lower regions of the plenums venting only
through the vent slots in the upper region of the brake. This
construction provides additional bum time for powder in the
propulsion gasses and significantly cuts down the flash signature
from the weapon. Militarily this is important because flash from a
rifle reveals the soldier's location to the enemy.
[0022] A further benefit of the construction of the plenums 25 is a
reduction in the explosive sound emitted from the brake. This is
important not only to the soldier firing the weapon, but to
companions nearby.
[0023] And because the propulsion gasses exit the plenums 25
through vent slots 28 the gasses are not directed rearwardly and
back blast is avoided for the safety and comfort of the soldier and
companions.
[0024] It is desired that alignment means be provided between
members 15 and 16, 16 and 17, and 17 and 18. As best shown in FIGS.
3 and 4 the alignment may take the form of alignment pins 29
provided on a face of one member for entering alignment bores on
the face of an adjoining member. No such alignment means is
provided between members 15 and 14 because member 14 must be free
to turn in sleeve 12 for attaching the brake to the muzzle of a
weapon while keeping the vent slots 28 properly oriented.
[0025] It is to be noted that the sleeve 12 of the brake is
provided with a plurality of openings 31 to permit propulsion
gasses to escape from the brake. These openings 31 are preferably
longitudinal slots as shown in FIG. 1 and are preferably chambered
as indicated at 32 in FIG. 5 to expose more of the area of the vent
slots 28 and to segment exiting gasses to break up any flash
signature.
[0026] The assemblage 13 of plenum forming members 14, 15, 16, 17
and 18 is held in place in sleeve 12 by a nose piece 33 threadably
received in the forward end of the sleeve. Nose piece 33 is
preferably hollow and formed in two pieces so as to provide two
final propulsion gas expansion chambers, or plenums, 34 and 35 with
reaction wall surfaces 36 and 37 to further reduce recoil, flash
and noise. See FIG. 6. A set screw 38 can be employed to lock the
nose piece against turning and becoming loose.
[0027] Although the plenum forming members and the retainer sleeve
illustrated have cylindrical configurations, and that is preferred
for ease of manufacture, these elements could possess noncircular
cross-sections if for some reason that is desired.
* * * * *