U.S. patent application number 10/220339 was filed with the patent office on 2003-06-12 for sub-calibrated projectile for a gun.
Invention is credited to Garcia, Juan Martinez.
Application Number | 20030106453 10/220339 |
Document ID | / |
Family ID | 8496312 |
Filed Date | 2003-06-12 |
United States Patent
Application |
20030106453 |
Kind Code |
A1 |
Garcia, Juan Martinez |
June 12, 2003 |
Sub-calibrated projectile for a gun
Abstract
The projectile (1) is composed of a body divided into a front
part (2) and a rear part (3), the latter being hollow. In the front
part is embedded and fixed under pressure an axial rod (4) which
terminates in a hard tip (6) located towards the front, which is
conical in shape and terminated in the form of a cap (7), this tip
(6) closing the front end of an air chamber (5) set axially in the
front part (2) of the body (1) of the projectile, in such a way
that when the projectile impacts, the tip (6) is displaced towards
the inside of the chamber (5), which it causes to be compressed,
thus converting the projectile (1) into pellet. The body of the
projectile (1) is cylindrical and the helicoidal external grooves,
like the body of which they form part, are made of lead with a high
antimony content, and due to their remain intact when fired, a fact
which, in combination with the hollow rear part (3), provides the
trajectory with a great degree of precision. For loading in the
firearm, the projectile is arranged within a container, which
retains it and acts additionally as a shock-absorbing element and
stopper for the gases generated on firing.
Inventors: |
Garcia, Juan Martinez;
(Pozoblanco, ES) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK, L.L.P.
2033 K STREET N. W.
SUITE 800
WASHINGTON
DC
20006-1021
US
|
Family ID: |
8496312 |
Appl. No.: |
10/220339 |
Filed: |
December 27, 2002 |
PCT Filed: |
December 21, 2001 |
PCT NO: |
PCT/ES01/00502 |
Current U.S.
Class: |
102/521 |
Current CPC
Class: |
F42B 14/064 20130101;
F42B 12/34 20130101; F42B 7/10 20130101; F42B 7/08 20130101 |
Class at
Publication: |
102/521 |
International
Class: |
F42B 014/06 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 3, 2001 |
ES |
P 200100010 |
Claims
1. Subcalibrated projectile for shotguns which, belonging to the
same type as those which include a steel rod fixed axially in the
body of the projectile, this rod terminating in a tip situated to
the fore, having also a series of helicoidal grooves on its lateral
surface, being intended for shooting by hunting shotguns, whether
smooth-bore or rifle-barrelled, is characterised in that it is
composed of a single body (1) with a hollow rear part (3) and a
front part (2) in which is duly and suitably fixed under pressure
the rod (4) which bears the front tip (6), this tip being conical
in form, its convex external surface in the form of a cap, this
conical tip (6) closing the mouth of an air chamber (5) to be found
in that front part (2) of the body (1) of the projectile, which, on
being compressed by the tip (6) on impact with the animal
transforms said body of the projectile into pellet; while it has
also been intended that, when loaded in the corresponding barrel of
the firearm of shotgun, it is positioned in a container (9), formed
by tabs (10) arranged at equal angles to each other in a circular
trajectory, these tabs (10) each being endowed on their inner face
with claws (11) for interlocking on a step (8) set in the form of a
ring in the body (1) of the projectile, for the retention of the
projectile within said container (9), provision also having been
made for the rear part (12) of the container to be closed.
2. Subcalibrated projectile for shotguns, according to claim 1,
characterised in that the projectile (1) is cylindrical and the
helicoidal grooves (1') in its lateral surface are variable in
number and markedly inclined.
3. Subcalibrated projectile for shotguns, according to preceding
claims, characterised in that the hollow (3') created in the rear
part (3) of the body (1) of the projectile is occupied by a filler
material (15), through which passes a rear prolongation of the rod
(4), the rear end of which is fixed by means of special pressurised
nuts or some similar element (16).
4. Subcalibrated projectile for shotguns, according to claim 3,
characterised in that the filler material (15), which occupies the
hollow (3') of the rear part (3) of the body of the projectile (1),
is high-pressure polythene.
5. Subcalibrated projectile for shotguns, according to any of the
preceding claims, characterised in that the front end of the rod
(4) is conical in shape (6'), resting at its base on the flat end
corresponding to the front part (2) of the body (1) of the
projectile.
6. Subcalibrated projectile for shotguns, according to preceding
claims, characterised in that the tabs (10) corresponding to the
container (9) have some internal projections (11') with an arched
profile in order to retain the body of the projectile (1), with the
special feature that, from these arching projections (11') and as
far as the free end of the tabs (10) are formed inclined planes
(17) which assist in the departure of the body of the projectile
(1) from the container (9).
Description
OBJECT OF THE INVENTION
[0001] The present invention refers to a subcalibrated projectile
intended to be mounted in a container, in which it is suitably
retained, in order to achieve the total immobilisation of the
projectile inside the cartridge and subsequently in the barrel of
the firearm, the container serving as a means to absorb pressure
and as a stopper for the firing gases. The subcalibrated projectile
is materialised in a single-piece body which is complemented with
an axial rod which is embedded under pressure inside the body of
the projectile, the rod terminating in a conical point which
projects beyond the fore-end of the projectile and also grooved
heliocoidally on the outside in a markedly inclined plane, which
provides a high gyroscopic velocity and exceptional spin
precision.
[0002] The projectile of this invention is intended to be fired by
firearms, to be more precise, shotguns used for hunting game.
[0003] The object of the invention is to provide the world of
hunting with a projectile which, in addition to offering great
range on account of its particular characteristics, and together
worth its great shooting speed and precision, is transformed into
pellet on impact with the animal, thus bringing about maximum
efficiency in the use of the projectile itself.
BACKGROUND OF THE INVENTION
[0004] The projectiles used in hunting shotguns usually have a
smooth external surface which gives rise to a lack of stability on
being fired and a modest range, although it should be said that
there exist some projectiles composed of two bodies fixed to each
other and complemented with a rod which, in addition to being
bushing through the bodies and comprising the means by which the
two are fixed together, is terminated in a point which is harder
than the aforementioned bodies, conical in shape and forms frontal
medium which has to impact first upon the target, generally upon an
animal.
[0005] In relation to this type of projectile, worth mentioning is
the one claimed in the Spanish Utility Model 9902957 of the same
applicant, where the end of the frontal tip is truncated, forming a
tapered body, in such a way that the two basic bodies of the
projectile have complementary means of axial connection, being
fixed by means of a nut that screws into the rear end of the rod
corresponding to the tapered body or tip mentioned above, the rear
body being complemented with a back board to conceal the nut for
tightening and fixing, while in the front body there is an air
chamber which is closed by the base of the tapered body or tip
aforementioned, the shape of the body comprising the two
aforementioned bodies and the front tapering slightly, and being
grooved longitudinally, though with a slight inclination, and being
endowed towards the rear with a smooth band which adapts to the
corresponding bore of the firearm in order to avoid the escape of
gases that originate in the explosion, thus achieving greater
firing effectiveness.
DESCRIPTION OF THE INVENTION
[0006] The proposed projectile, while based on that disclosed in
the aforementioned Spanish Utility Model 9902957 belonging to the
same applicant, presents a series of improvements or new features
which give rise to some new performance qualities in the behaviour
of the projectile.
[0007] To be more precise, the projectile of the invention has a
single body, cylindrical in shape, with a totally hollow rear part
to lighten the weight and a front part where the corresponding rod
is located axially, terminating in the projectile's hard front tip,
the latter being conical in shape but for its external base in the
shape of a spherical cap which allows the hard point of the
projectile's rod to fit perfectly in the mouth of the chamber that
is to be found in the rear part of the body, while the rest of the
rod is fitted into the latter under pressure in order to be bonded
to it perfectly.
[0008] At the same time, it has been planned for the number of
grooves set into the lateral surface of the projectile's body be
several, and markedly inclined, which enables the projectile to be
endowed with a gyroscopic speed which is practically the same as
that achieved by means of a rifle.
[0009] The hollow rear part of the body, as well as lightening its
weight, allows the trajectory to be equilibrated in flight, thus
avoiding pitching or deviations on account of the front part's
being much heavier than its rear part or tail.
[0010] The nature or material of the body of the projectile is by
preference lead, with high antimony content, thus avoiding possible
deformation within the firearm's barrel, even when the pressure to
which is subjected is the maximum, approximately 900Kg/cm.sup.2, so
that, since it suffers no deformation within the barrel, its
precision increases as its grooves will remain intact.
[0011] At the same time, the subcalibrated projectile of the
invention offers the great advantage of causing absolutely no
damage to the firearm's necking, since its diameter is two
millimetres less than that of the barrel of the firearm or shotgun
which fires it.
[0012] The aforementioned projectile also offers the advantage that
when the tip, in the form of a cap, impacts against the animal, it
sinks back and enters the air chamber to be found in the rear part
of the projectile's body where it is transformed into pellet and
provokes a shock wave within the animal.
[0013] This projectile, as mentioned above, is complemented with a
container formed by some rectangular tabs set at equal angles to
each other and provided on their inside face with a claw to fix the
projectile, by means of a ring-step in the projectile in which
these claws lodge. The tabs emerge from a rear part, which is
closed to serve as a base coupled to some means of
shock-absorption. This container acts to immobilise the projectile
in the cartridge and in the barrel of the firearm, as well as
absorbing pressure and serving as a stopper for the firing gases,
and is preferably made of dense polythene.
[0014] In an alternative embodiment, the hollow rear part of the
projectile is filled with some material, preferably highly
pressurised polythene, through which passes the axial rod as it
reaches towards the rear part as far as the very lower base of the
body of the projectile, where it is fixed under pressure with a
special nut.
[0015] In another alternative embodiment, the conical tip forming
the front end of the rod takes, instead of the form of a cap, the
shape of a perfect cone, resting at its base on the flat end, which
terminates the rear part of the body of the projectile.
[0016] In another alternative embodiment, the container's tabs are
endowed with some arching projections, instead of with locking
claws on its inside face, from which and as far as the free end of
the tabs come into being sloping sections or surfaces which, on
exposure to the pressurised air, assist in the opening of the tabs
in order to set the projectile free, thus making its exit or
departure from the container easier.
DESCRIPTION OF THE DRAWINGS
[0017] In order to complement the current description and with the
aim of assisting in the better understanding of the invention's
features in accordance with a preferred example of its practical
embodiment, a set of drawings is attached, forming an integral part
of said description, where for illustrative but not restrictive
purposes the following is shown:
[0018] FIG. 1 shows a longitudinal cross-section view of the
subcalibrated projectile embodied in accordance with the object of
the present invention.
[0019] FIG. 2 shows a side view of the projectile represented in
the previous figure.
[0020] FIG. 3 shows a cross-section view of the container for the
positioning of the projectile represented in the previous
figures.
[0021] FIG. 4 shows a side elevation view of the projectile
positioned inside the container represented in the previous
figure.
[0022] FIG. 5 shows a longitudinal cross-section view of the
projectile, as represented in FIG. 1, in the alternative embodiment
whereby the hollow upper part is filled with a material through
which passes the rod itself.
[0023] FIG. 6 shows a cross-section view of the front end of the
projectile, where the tip of the rod as it emerges out of the front
end of the projectile itself is conical in shape.
[0024] FIG. 7 shows a side view of the container in an alternative
embodiment whereby the internal projections of the tab are rounded,
and from them, and as far as the free end of those tabs, sloping
surfaces come into being.
[0025] FIG. 8 shows, finally, a side elevation view of the
projectile as a whole, situated inside the container corresponding
to the previous figure, and where the projectile's rod has a
conical end or tip.
PREFERRED EMBODIMENT OF THE INVENTION
[0026] As may be seen in the aforementioned figures, the projectile
(1) of the invention comprises a body with a front part (2) and a
totally hollow rear part (3), in such a way that a rod (4) is
mounted in the front part which is held in place under pressure and
passes axially and continuously through a chamber (5) to be found
in front part (2), the rod (4) terminating in a tip (6) of conical
shape, the external face of which has the form of a cap (7) or
convex curve, in such a way that, on account of the tip's (6)
taper, it fits into the mouth of the chamber (5), as shown clearly
in FIG. 1.
[0027] The body (1) of the projectile is cylindrical and provided
with a ring-step (8), close to it front end, more precisely behind
the tapered part in which that body (1) terminates towards its
front, the body being made of lead with antimony, while the rod
(4), together with its tip (6), is made of steel, the tip
constituting a fuse. The lateral surface of the projectile's body
(1) is endowed with various helicoidal grooves (1'), both on the
front part (2) and on the rear, hollow part (3), as shown in FIG.
2.
[0028] The aforementioned projectile (1) is designed to be housed
and completely immobilised within a container (9), formed by
various tabs (10) set at equal angles to each other in a circular
trajectory in order to house the cylindrical body (1) of the
projectile properly, as shown in FIG. 4. These tabs (10) are each
endowed with claws (11) which lock into the step (8) of the body
(1) of the projectile, thus providing a means whereby the body and
the container (9) may be interlocked, the rear part of the
container being formed by a base (12) from which derives an
appropriate means of shock-absorption (13), which means (13) derive
from a stopper ring (14) over the corresponding gunpowder of the
cartridge wherein will be situated the combination of container (9)
and projectile (1).
[0029] In this way, it is the container (9), which holds the
projectile (1) inside the firearm's barrel, serving as a shock
absorber and stopper for the gases generated by the firing
itself.
[0030] The hollow rear (3) of the projectile (1), in addition to
lightening the latter's weight, is intended to balance the
trajectory of the projectile in flight, avoiding pitching or
deviations since it is much lighter than the front part (2) of the
same projectile.
[0031] As for the air chamber (5) to be found in the front part (2)
of the projectile, when compressed on impact by the tip (6) of the
rod (4), it converts said projectile (1) into pellet, as a result
of which the efficacy is optimal.
[0032] It should also be mentioned that the projectile is a
subcalibrated projectile endowed with helicoidal grooves (1') which
provide the projectile with a gyroscopic speed as if it were fired
by a rifle, thus achieving exceptional precision.
[0033] In an alternative embodiment shown in FIG. 5, the hollow
(3') of the rear part (3) is filled with some material (15),
preferably high-pressure polythene, through which material passes
the rod (4) itself, which reaches backwards before being fixed at
its rear end by means of a special pressurised nut (16).
[0034] It is also worth mentioning that the rod (4), instead of
having the end (6) of the outer surface rounded or in the form of a
cap, is conical in form (6') and rests at its base on the end
formed by a plane corresponding to the front part (2) of the
projectile's body (1).
[0035] In another alternative embodiment, the tabs (10) of the
container (9), instead of being endowed with the claws (11), has
some rounded and internal projections (11') from which, and as far
as the free end of such tabs (10), are formed sections with a
sloping surface (17) which assist the departure of the projectile
(1) from the container (9), since these sloping planes (17) enable
the tabs (10) to open better when exposed to the pressurised
air.
[0036] The body of the projectile (1) may be lacking the grooves
(11), that is to say, it may present a smooth external surface,
which would enable it to be used in rifle-barrelled shotguns and in
smooth-bore shotguns.
* * * * *