U.S. patent number 3,865,038 [Application Number 05/378,855] was granted by the patent office on 1975-02-11 for deterrent ammunition projectile.
Invention is credited to Irwin R. Barr.
United States Patent |
3,865,038 |
Barr |
February 11, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
DETERRENT AMMUNITION PROJECTILE
Abstract
Deterrent ammunition, including a projectile of soft elastic
rupturable material, such as natural or synthetic rubber or
plastic, having a charge of flowable material, such as finely
divided particulate or powder, liquid or gas, carried in a cavity
having relatively thin longitudinal rupture wall zones and thicker
longitudinal strengthening zones bounding the cavity, with a
generally ogive-forming nose section, having an over-all
effectively more rigid, yet soft elastic, piston-forming nose end,
the elastic thicker longitudinal wall zones enabling outward
flexing thereof in response to rearward piston movement of the
piston-forming nose end on target impact. The projectile may be
carried in and fired from a conventional cartridge case and ejected
from the cartridge by ignition of propellant in the cartridge,
which may effect gas pressure directly on the projectile rear end
or on a pusher element or elements engaging with the
projectile.
Inventors: |
Barr; Irwin R. (Lutherville,
MD) |
Family
ID: |
23494826 |
Appl.
No.: |
05/378,855 |
Filed: |
July 13, 1973 |
Current U.S.
Class: |
102/502 |
Current CPC
Class: |
F42B
12/50 (20130101); F42B 12/40 (20130101) |
Current International
Class: |
F42B
12/40 (20060101); F42B 12/50 (20060101); F42B
12/02 (20060101); F42b 011/18 (); F42b
031/00 () |
Field of
Search: |
;102/92.7,41,92.6,92,93 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Engle; Samuel W.
Assistant Examiner: Jordan; C. T.
Attorney, Agent or Firm: Pippin, Jr.; Reginald F.
Claims
I claim:
1. Deterrent ammunition, comprising,
a projectile formed by a rupturable flexible side wall section with
a cavity formed therein and having an annular bounding wall with
annularly spaced plural longitudinally extending thinner weakened
rupturable longitudinal wall zones which are substantially weaker
than interconnecting relatively thicker structurally reinforcing
side wall sections between said thinner weakened zones,
said side wall section being open at its rear end for securement to
the forward end of a separate base section,
nose and base sections closing said cavity at its forward and
rearward ends,
and a flowable dispersable material charge in said cavity for
dispersal upon impact of said projectile with a target,
said base section being a separate body secured at its forward end
to the open rear end of said rupturable flexible side wall section
along an annular rupturable shouldered connection zone
therewith,
said base section being relatively substantially more rigid as a
body than said wall section and forming a forwardly moving piston
acting against said charge and said side wall section upon impact
of said nose with a target mass, to thereby enable rupture along
one or more of the respective zones.
2. Deterrent ammunition according to claim 1,
said nose and wall sections being formed of relatively soft
elastic, material rupturable at said thinner weakened zones in
response to internal cavity pressures thereon as a function of
impacting said nose section with an object; and said thicker side
wall sections being outwardly flexible in response to said internal
cavity pressure and rearward impact movement of said nose
section.
3. Deterrent ammunition according to claim 2,
said wall section having a plurality of convex wall sections, with
longitudinally grooved sections therebetween and forming said
longitudinally extending thinner wall zones.
4. Deterrent ammunition according to claim 2,
said nose section having a generally ogive shape and including a
relatively thick piston nose portion, with a relatively flexible
annular wall section extending rearward of said piston nose section
and forming a flexible connection between said piston nose section
and said base section.
5. Deterrent ammunition according to claim 1,
said base section being substantially thicker and stronger than
said flexible side wall section,
said base section being reinforced with glass fiber filling.
6. Deterrent ammunition comprising
a projectile formed by a rupturable flexible side wall section with
a cavity formed therein and having an annular bounding wall with
annularly spaced plural longitudinally extending thinner weakened
longitudinal wall zones which are substantially weaker than
interconnecting relatively thicker structurally reinforcing side
wall sections between said thinner weakened zones,
nose and base sections closing said cavity at its forward and
rearward ends,
and a flowable dispersable material charge in said cavity for
dispersal upon impact of said projectile with a target,
said projectile having a rifling band thereon,
and a relatively rigid reinforcing annulus forming a portion of
said base section,
said rifling band being formed on said reinforcing annulus.
7. Deterrent ammunition according to claim 6, said reinforcing
annulus being a reinforcing cup.
8. Deterrent ammunition according to claim 7, said reinforcing cup
being formed of thermoplastic resin.
9. Deterrent ammunition according to claim 8, said reinforcing cup
being formed of glass-filled thermoplastic resin.
10. Deterrent ammunition, comprising
a projectile formed by a rupturable flexible side wall section with
a cavity formed therein and having an annular bounding wall with
annularly spaced plural longitudinally extending thinner weakened
rupturable longitudinal wall zones which are substantially weaker
than interconnecting relatively thicker structurally reinforcing
side wall sections between said thinner weakened zones,
said side wall section being open at its rear end for securement to
the forward end of a separate base section,
and nose and base sections closing said cavity at its forward and
rearward ends,
said base section being a separate body secured at its forward end
to the open rear end of said rupturable flexible side wall section
along an annular rupturable shouldered connection zone
therewith,
said base section being relatively substantially more rigid as a
body than said wall section and forming a forwardly moving piston
acting against said charge and said side wall section upon impact
of said nose with a target mass, to thereby enable rupture along
one or more of the respective zones.
11. Deterrent ammunition according to claim 10,
said nose and wall sections being formed of relatively soft elastic
material rupturable at said thinner weakened zones in response to
internal cavity pressures thereon as a function of impacting said
nose section with an object, and said thicker side wall sections
being outwardly flexible in response to said internal cavity
pressure and rearward impact movement of said nose section.
12. Deterrent ammunition according to claim 11,
said wall section having a plurality of convex wall sections, with
longitudinally grooved sections therebetween and forming said
longitudinally extending thinner wall zones.
13. Deterrent ammunition according to claim 11,
said nose section having a generally ogive shape and including a
relatively thick piston nose portion, with a relatively flexible
annular wall section extending rearward of said piston nose section
and forming a flexible connection between said piston nose section
and said base section.
14. Deterrent ammunition according to claim 13,
said base section being substantially thicker and stronger than
said flexible side wall section.
15. Deterrent ammunition according to claim 13,
said base section being formed of rubber being reinforced with
glass fiber filling.
16. Deterrent ammunition according to claim 11,
said nose section having a generally ogive shape and including a
relatively thick piston nose portion, with a relatively flexible
annular wall section extending rearward of said piston nose section
and forming a flexible connection between said piston nose section
and said base section,
said base section being formed of glass fiber filled material.
17. Deterrent ammunition according to claim 10,
said nose and wall sections being formed of relatively soft elastic
material rupturable at said thinner weakened zones in response to
internal cavity pressures thereon as a function of impacting said
nose section with an object, and said thicker side wall sections
being outwardly flexible in response to said internal cavity
pressure and rearward impact movement of said nose section,
a relatively rigid reinforcing annulus disposed about said
projectile,
said relatively rigid reinforcing annulus having a
circumferentially weakened longitudinal separation zone enabling
radial expansion of said annulus for rifling engraving engagement
with a barrel bore as a function of set-back forces on said
projectile during firing.
18. Deterrent ammunition according to claim 17,
said reinforcing annulus being longitudinally split along said
weakened separation zone.
19. Deterrent ammunition according to claim 18,
said reinforcing annulus being a longitudinally split sleeve
separable from said base, side walls and nose sections of said
projectile after exit from a rifled barrel bore.
20. Deterrent ammunition, comprising
a projectile formed by a rupturable flexible side wall section with
a cavity formed therein and having an annular bounding wall with
annularly spaced plural longitudinally extending thinner weakened
longitudinal wall zones which are substantially weaker than
interconnecting relatively thicker structurally reinforcing side
wall sections between said thinner weakened zones,
and nose and base sections closing said cavity at its forward and
rearward ends,
said nose and wall sections being formed of relatively soft elastic
material rupturable at said thinner weakened zones in response to
internal cavity pressures thereon as a function of impacting said
nose section with an object, and said thicker side wall sections
being outwardly flexible in response to said internal cavity
pressure and rearward impact movement of said nose section,
said projectile having a rifling band thereon,
and a relatively rigid reinforcing annulus forming a portion of
said base section, said rifling band being formed on said
reinforcing annulus.
21. Deterrent ammunition according to claim 20, said reinforcing
annulus being a reinforcing cup.
22. Deterrent ammunition according to claim 21, said reinforcing
cup being formed of thermoplastic resin.
23. Deterrent ammunition according to claim 22, said reinforcing
cup being formed of glass-filled thermoplastic resin.
Description
This invention relates to deterrent ammunition, and more
particularly to personnel deterrent ammunition projectiles which
are rupturable on impact, and which may be launched against a
target with rupture occurring on impact, for cushioning of the
impact forces, and, if desired, may deliver a flowable material on
impact rupture. The projectile may be launched directly against
rioting personnel to provide an impact shock or sting to the target
personnel and, if so desired, to deliver a desired flowable
material in the vicinity of the target personnel with substantially
reduced hazard as compared to conventional ammunition.
Various materials and arrangements have been employed in an effort
to control rioting or other disorderly personnel, while minimizing
ultimate damage to the personnel being controlled. Fire hoses have
been used for this purpose, but have been generally abandoned or
found to be generally unsatisfactory, due to the very substantial
injury potential, as well as the unfavorable image cast on
firefighting units by their association with this tactical weapon.
Water cannons have also been tried, and while the water cannon has
advantages over the fire hose approach, it nevertheless has very
substantial injury-producing potential. Technically, the fire hose
and the water cannon systems utilize a similar principle of
projecting a variable intensity water jet stream to unbalance
and/or disarm an individual. Water cannons and fire hose also are
large, heavy, cumbersome and normally require several persons for
operation.
Also, various mechanisms have been employed, including launchable
grenades and shells, for delivery of a desired charge of control
agent to a target area. However, these prior mechanisms have
various disadvantages, and the launched grenades or shells have
conventionally been quite lethally hazardous to target personnel in
the event of impact with such personnel.
It is an object and feature of the present invention to provide an
improved personnel control deterrent ammunition projectile which
provides relatively low lethality hazard to the target personnel,
while enabling a substantial degree of deterrent control of such
personnel by cushioned impacting of the target personnel with the
impact-rupturable projectile, and, if so desired, by impact rupture
delivery of a flowable charge of material to the target zone,
through impacting of the rupturable projectile, the projectile
carrying a charge of flowable dispersable material which is
discharged on projectile impact contact with the target personnel
or other target in the vicinity of target personnel.
It is a further object and feature of the invention to provide an
improved low-hazard riot control ammunition which enables the
delivery of a marking or other desired liquid to the vicinity of a
rioting person or persons, and which will rupture in an
impact-cushioning fashion on impact, with good dispersion
characteristics.
Still further objects, features and advantages will become apparent
to one skilled in the art from a reading of the following
description of a preferred embodiment, constructed in accordance
with the invention, taken in conjunction with the accompanying
drawings wherein:
FIG. 1 is a longitudinal section view, on line 1--1 of FIG. 2, of a
projectile according to the invention.
FIG. 2 is a view in cross-section on line 2--2 of FIG. 1.
FIG. 3 is a cross-section view similar to FIG. 2, illustrating a
modification.
FIG. 4 is a cross-section view of a modified rear end section of a
projectile according to the invention.
FIG. 5 is a perspective view, partially cut away for clarity, of a
further modification utilizing a separate removable lateral
reinforcing sleeve external of the projectile.
Referring now in detail to the figures of the drawing, a projectile
11 is provided, preferably formed in two major sections, including
a nose and side wall section 21 secured to a rear section 31.
The nose and side wall section 21 is formed with a piston-forming
nose end wall portion 23 and a side wall portion 25. Side wall
portion 25 has weakened zones formed by spaced grooves or
depressions in a face thereof, preferably the inner surface, as by
longitudinal grooves 27 as shown. The thicker wall sections 29
between the longitudinal grooves 27 form elastically flexible
longitudinal columnar and radial strengthening zones, and the
ungrooved nose portion 23 forms a more rigid, yet elastic and shock
cushioning, piston portion which is depressed rearwardly to effect
outward bending of the annular side wall portion 25 upon impacting
of the nose with a target or other object.
The thicker relatively more rigid rear section 31 has a shoulder
33, 34 onto and against which the nose and side wall section 21 is
secured, as by adhesive or other suitable securing medium. The
sections 21, 31 are preferably formed of natural or synthetic
rubber, or other similar material, (preferably having a durometer
of approximately 30-50), and a suitable rubber adhesive may be
utilized. In an embodiment employing a projectile made of silicone
rubber, a suitable example being silicone rubber sold by Dow
Corning under the name RTV, a suitable adhesive has been found to
be a silicone rubber adhesive marketed by Dow Corning under the
designation RTV-732.
The base or rear section 31 has a rifling band 35 formed thereon to
impart stabilizing spin to the projectile when the projectile is
fired from a rifled barrel.
To provide additional strength, particularly for rifling engraving
action, to the soft elastic rubber material, glass fibers or other
strengthening fibers may be added to the rubber molding compound
used in the base or rear section 31. While the rifling band is
preferably on the base or rear closure section 31, a rifling band
may alternatively be formed on a portion of the side wall portion
25, although this is not as desirable as it is preferred to employ
a forward section 21 which is devoid of such strengthening media as
glass fibers which are desirable to be utilized for rifling band
forming section.
A cavity C is formed within and bounded by the nose and side wall
section 21 and the rear section 31, in which may be disposed a
suitable charge of flowable material, such as finely divided
particulate or powder, e.g., tear gas powder, or liquid, P for
dispersal through rupture openings formed along grooves 27 on
impact of the projectile with a target or other object.
Alternatively, while delivery and dispersal of a charge of flowable
material P is preferred and most advantageous, the projectile may
also be used without a charge of material in the rupturable cavity
C, in which event the personnel impact deterrent utility of the
soft rupturable projectile is employed, with the hydraulic gas
compression and lateral expulsion and columnar bending cushioning
advantages flowing from the piston nose 23 and bendably collapsible
columnar zones 29 and rupturable lateral weakened zones 27 of the
side wall 25, being utilized for desired shock absorption so as to
minimize personnel permanent damage or lethality on impact.
The projectile 11 may be suitably mounted in and fired from a
conventional cartridge having ignitable propellant therein, and a
pusher, of conventional or other desired design, may be utilized to
impart propellant gas forces to the projectile if so desired.
Securing of the projectile 11 in a cartridge case may be effected
as by crimping of the forward end zone of the case (not shown)
about and into gripping relation with the annular surface 37
rearward of rifling band 35.
In operation, the projectile 11 will be ejected from a barrel bore,
preferably a rifled bore for suitable spin stabilization and
accuracy, and impact of nose 23 with a target or other object will
effect relative rearward movement of the piston-forming nose 23
toward the forwardly moving piston-forming base or rear section 31,
and/or vice versa, as generally indicated in phantom line in FIG.
1, effecting shock-absorbing columnar collapse of stiffening column
zones 29 and shock-absorbing compressive action on the powder,
liquid, or gas contents P, in cavity C, all of which results in
rupture of weakened zones 27 and lateral ejection of the flowable
material P from the cavity C through ruptured zones 27. Impact
forces may also ultimately effect rupture along the connection zone
between sections 21 and 31, at shoulder 33, 34, and thereby further
effect ejection of the material P.
A modification is illustrated in cross section in FIG. 3, in which
the longitudinally weakened zones are formed by external
longitudinal grooves in the outer annular surface of the side wall
and nose section 121, and extending to the piston-forming nose
portion 123. The thicker and columnar stiffer soft elastic zones
are indicated at 129.
A further modification is illustrated in FIG. 4, in which a
reinforcing annulus in the form of a cup or shell 231a forms the
effective rear face and annular rifling band surface 235 of the
rear section 231 for a projectile having a forward side wall and
nose section 21, as in FIGS. 1 or 3, suitably secured thereto as at
shoulder 233, 234 as in the embodiment of FIG. 1. The shell annulus
231a may be suitably formed of thermoplastic resin, preferably
low-density material such as polyethylene, or nylon or other
thermoplastic resin may be employed if desired for a given
utilization. The resin may be suitably reinforced with glass or
other reinforcing fibers incorporated in the molding compound, if
desired, particularly as an aid in rifling engraving upon firing
and travel of the projectile along a rifled barrel bore. In this
embodiment, the silicone rubber or other molding compound for main
central and forward portion of base or rear section 231 is
preferably molded in situ in the previously formed cup or other
effective annulus 231a, thereby aiding in securement thereto,
although separate formation and subsequent assembly may be
effected, with set back compressive forces on the main central
rubber portion of base 231 serving to provide frictional gripping
action between the contiguous interfacing wall surfaces of this
rubber central portion and the cup annulus 231a upon firing and
rifling-effected spin-up action on the cup annulus 231a.
In FIG. 5, a further modification is illustrated, in which the
barrel bore and rifling engagement, during travel of the projectile
311 along a barrel bore, is effected by a split sleeve annulus 341,
which effectively encompasses the major longitudinal extent of the
projectile, including the rear or base section 333 and the
cylindrical or straight side wall portion of side wall and nose
section 321. In this embodiment, the rifling band on the projectile
is eliminated and the sleeve 341 serves to engrave the rifling and
effect spin-up to itself and the projectile 311, which may
otherwise take the form of one of the preceding embodiments of
FIGS. 1 or 3, or other suitable embodiment within the teachings
hereof. Sleeve 341 may be suitably split longitudinally and will be
expanded radially into rifling engraving engagement with a barrel
bore as a function of set-back forces on the projectile during
firing. A pusher, preferably an obturating pusher disc of standard
construction and utilization, not shown, may be suitably employed
to transmit forward propulsion forces from the propellant gases of
a cartridge to the projectile 311 and sleeve 341 upon firing of the
projectile, and this pusher may also engage the rifling in
rotation-imparting relation to aid in imparting rotation to the
projectile 311 through forward driving action on and frictional
face contact with the rear face of the rear section 333 of the
projectile and the rear face of the expandible sleeve 341. The
sleeve 341 also aids in protecting the projectile during travel
along the barrel bore, as well as providing a desired reduction of
any tendency of the rubber or other soft elastic projectile walls
to grip and unduly retard the projectile during travel along the
barrel bore. Upon exit from the barrel the split sleeve 341 will
separate and be discarded from the projectile under centrifugal and
other forces thereon, and by utilizing a suitably low density
material for the sleeve 341, the secondary projectile dangers
therefrom may be minimized, the high drag/low mass relationship
then resulting in relatively quick dissipation of the sleeve travel
energy, and the low mass will itself minimize danger of damage on
any inadvertent impact. To this end, the sleeve is preferably
formed of low density material such as low density polyethylene, or
other suitably low density material such as other thermoplastic or
other resins.
While the invention has been described with respect to several
physical embodiments, it will be apparent that various
modifications and improvements may be made without departing from
the scope and spirit of the invention. For instance, the projectile
of FIG. 5, without a rifling band, may have its spin imparted
thereto solely by frictional or other interengagement with a
driving pusher disc or a sabot if so desired. In such event, or
otherwise, the rear face of base or rear section 333 may be
provided with grip enhancing means, such as radial spoked or other
suitable recess in or on its surface. Accordingly, the invention is
not to be limited by the illustrative embodiments, but only by the
scope of the appended claims.
* * * * *