U.S. patent application number 15/355090 was filed with the patent office on 2017-06-15 for monolithic bullet projectile for rifle firearms and method of making same.
The applicant listed for this patent is Dobromir Goryluk. Invention is credited to Dobromir Goryluk.
Application Number | 20170167837 15/355090 |
Document ID | / |
Family ID | 59019082 |
Filed Date | 2017-06-15 |
United States Patent
Application |
20170167837 |
Kind Code |
A1 |
Goryluk; Dobromir |
June 15, 2017 |
Monolithic bullet projectile for rifle firearms and method of
making same
Abstract
The invention comprises a monolithic bullet projectile for rifle
firearms (FIG. 1), having cylindrical profile of front guiding
section (CP) of a diameter which is lower than or equal to a
diameter of lands (oP) of the rifled bore of the firearm barrel,
with specific short head (CG) of half-circle or cone shape, and a
method of making same. It is characterized in that the centre of
gravity (SC) is situated in the front, cylindrical guiding section
of the bullet, and the back trailing section (CW), situated behind
the centre of gravity (SC) of the whole bullet, has radial
profiling comprising the relieving grooves (RO) of a diameter lower
than a diameter of lands (oP) of the rifled bore of the firearm
barrel and the trailing rings (PW) of a diameter which is equal to
or lower than a diameter of the rifles (oB) of the rifled bore of
the firearm barrel, situated in the following order: trailing
ring-relieving groove-trailing ring or multiplication of that
configuration, so that the total number of the trailing rings (PW)
of the bullet is always twice as high as the number of relieving
grooves (RO) of the bullet. A method of making the bullet according
to the invention is characterized in that the guiding section of
the bullet (CP) is calibrated independently up to a diameter which
is lower than or equal to a diameter of lands (oP) of the rifled
bore of the barrel, and the radial profiling of the trailing
section of the bullet (CW), comprising the relieving grooves (RO)
and trailing rings (PW), is made in a single technological
operation, applying for the making of trailing rings (PW) the
effect of upsetting of the homogeneous material of the bullet along
the edge of the radial relieving groove (RO) while the trailing
section of the bullet (CW) is calibrated independently up to a
diameter which is lower than or equal to a diameter of the rifles
(oB) of the rifled bore of the barrel.
Inventors: |
Goryluk; Dobromir;
(Warszawa, PL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Goryluk; Dobromir |
Warszawa |
|
PL |
|
|
Family ID: |
59019082 |
Appl. No.: |
15/355090 |
Filed: |
November 18, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F42B 30/02 20130101;
F42B 14/02 20130101; F42B 12/74 20130101; F42B 33/00 20130101 |
International
Class: |
F42B 12/74 20060101
F42B012/74; F42B 33/00 20060101 F42B033/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 9, 2015 |
PL |
P.415209 |
Claims
1. A monolithic bullet projectile for rifle firearms, having
cylindrical profile of front guiding section (CP) of a diameter
which is lower than or equal to a diameter of lands (oP) of the
rifled bore of the firearm barrel, with specific short head (CG)
shaped as a spherical cap, a hemisphere, a truncated hemisphere, a
cone, a truncated cone or a flat, wherein the centre of gravity
(SC) of the bullet is situated in the cylindrical front guiding
section of the bullet.
2. A monolithic bullet projectile according to claim 1, wherein the
back trailing section (CW), situated behind the centre of gravity
(SC) of the whole bullet, has radial profiling comprising the
relieving grooves (RO) of a diameter lower than a diameter of lands
(oP) of the rifled bore of the firearm barrel and the trailing
rings (PW) of a diameter which is equal to or lower than a diameter
of the rifles (oB) of the rifled bore of the firearm barrel,
situated in the following order: trailing ring-relieving
groove-trailing ring or multiplication of that configuration, so
that the total number of the trailing rings (PW) of the bullet is
always twice as high as the number of relieving grooves (RO) of the
bullet.
3. A method of making a monolithic bullet projectile for rifled
firearms, made of copper or copper alloys, wherein radial profiling
of the trailing section of the bullet (CW) comprising the relieving
grooves (RO) and trailing rings (PW), situated in the following
order: trailing ring-relieving groove-trailing ring or
multiplication of that configuration, is made in a single
technological operation, applying for the making of trailing rings
the effect of upsetting of the homogeneous material of the bullet
(2) along the edge of the radial relieving groove, using a cutting
roll or a set of cutting rolls (7) acting together with cylindrical
rolls (8) supporting the bullet material.
4. A method according to claim 3, wherein the guiding section of
the bullet (CP) is calibrated independently up to a diameter which
is lower than or equal to a diameter of lands (oP) of the rifled
bore of the barrel, and the trailing section of the bullet (CW) is
calibrated independently up to a diameter which is lower than or
equal to a diameter of rifles (oB) of the rifled bore of the
barrel.
Description
TECHNICAL FIELD
[0001] The invention relates to a monolithic bullet projectile for
rifle firearms and to a simple method of making same.
BACKGROUND ART
[0002] Heavy, blunt head projectiles made from copper or brass, of
stable mass and shape known as full monolithic projectiles (Solid
or Monobloc type) are commonly used, especially in huntsman's
practice (Manfred R. Rosenberger "Huntsman's ammunition; Structure;
Behavior inside the target; Application" Bellona Ed., Warsaw 2009,
pp. 198-206). Such projectiles maintain stable ballistic flight
trajectory due to gyroscopic stabilization.
BRIEF SUMMARY OF THE INVENTION
[0003] The invention relates to a monolithic bullet projectile for
rifle firearms, having cylindrical profile of front guiding section
(CP) with specific short head (CG) of half-circle or cone shape,
and the back trailing section (CW), situated behind the centre of
gravity (SC) of the whole bullet, having radial profiling
comprising the relieving grooves (RO) and the trailing rings (PW),
situated in the following order: trailing ring-relieving
groove-trailing ring or multiplication of that configuration.
[0004] The invention relates further to a method of making the
bullet according to the invention wherein the guiding section of
the bullet (CP) is calibrated independently up to a diameter which
is lower than or equal to a diameter of lands (oP) of the rifled
bore of the barrel, and the radial profiling of the trailing
section of the bullet (CW), comprising the relieving grooves (RO)
and trailing rings (PW), is made in a single technological
operation, applying for the making of trailing rings (PW) the
effect of upsetting of the homogeneous material of the bullet along
the edge of the radial relieving groove (RO) while the trailing
section of the bullet (CW) is calibrated independently up to a
diameter which is lower than or equal to a diameter of the rifles
(oB) of the rifled bore of the barrel.
[0005] According to the invention, independent calibration of a
diameter of lands (oP) and of a diameter of the rifles (oB) allows
for individual fitting of the external dimensions of the bullet to
any barrel of the rifle firearm, even if the wear of the rifle is
significant which is crucial in the process of extending the
lifetime of the firearm.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0006] The invention is described in detail in reference to the
accompanying drawings, in which:
[0007] FIG. 1 presents a half-section of the bullet projectile;
[0008] FIG. 2 presents a cross-section of the typical rifled barrel
bore of a firearm;
[0009] FIG. 3 presents a scheme of the operation of cutting the
starting material for the bullet and of shaping the bullet
head--front view (left) and side view (right);
[0010] FIG. 3a presents the start of the operation of cutting the
weighed billet;
[0011] FIG. 3b presents the end of the operation of cutting the
weighed billet;
[0012] FIG. 4 presents scheme of the operation of calibrating the
guiding section of the bullet, including finishing the bottom
surface;
[0013] FIG. 5 presents scheme of the operation of cutting the
relieving grooves including simultaneous profiling of the guiding
rings of the bullet--front view (left) and side view (right);
[0014] FIG. 5a presents the start of the operation of cutting the
relieving grooves;
[0015] FIG. 5b presents the end of the operation of cutting the
relieving grooves;
[0016] FIG. 6 presents the scheme of the operation of calibrating
the trailing section of the bullet.
DISCLOSURE OF THE INVENTION
[0017] According to the invention the bullet projectile made fully
of copper or copper alloys, as shown in a half-section in FIG. 1,
has typical cylindrical profile of guiding section (CP) with very
short head (CG) of half-circle or cone shape. Trailing section of
the bullet (CW), situated in its back behind its centre of gravity
(SC), has radial profiling comprising the relieving grooves (RO) of
a diameter which is lower than a diameter of the lands (oP) of the
rifled barrel bore and the trailing rings (PW) of a diameter which
is lower than or equal to a diameter of the rifles (oB) of the
rifled barrel bore. Short bottom section of the bullet (CD) is
terminated with a truncated cone or with a flat.
[0018] A cross-section of typical rifled barrel bore of a firearm
is shown in FIG. 2.
[0019] Relieving grooves (RO) diminish the radial stiffness of
bullet solid body, resulting in reduction of force needed to
overcome the resistance of rifled barrel bore to the bullet driving
along.
[0020] Trailing rings (PW) which are responsible for providing
gyroscopic stabilization effect to the bullet, increase tightness
between bullet body and rifled barrel bore, resulting in reduction
of working pressure losses of gunpowder gases in the back space of
the barrel.
[0021] Situation of trailing rings (PW) in the back section of the
bullet, behind the centre of gravity (SC), results in improvement
of ballistic characteristics of the bullet flight after the bullet
leaves the barrel bore, through providing additional fin
stabilization due to increasing the resistance to air flowing
around the extended back of the bullet, as disclosed in PI Patent
PL 211026 B1 published on 30 Mar. 2012 WUP March 2012.
[0022] Guiding section of the bullet (CP) comprises a smooth
cylindrical area of a diameter equal to or lower than a diameter of
the lands (oP) of the rifled barrel bore, providing a slide fit of
that section of the bullet in the barrel bore which improves
characteristics of interior ballistics through diminishing the
resistance related to surface friction during driving of the bullet
along the barrel bore.
[0023] Short head section of the bullet (CG) which can comprise a
spherical cap, a hemisphere, a truncated hemisphere, a cone, a
truncated cone or a flat, ensures a stable flight of the bullet
when it flies through light hurdles (shrubs, grass) due to edge
stabilization which is created during flight because of the
asymmetrical air pressure growing on the head of bullet. This is
crucial when the bullet is used in huntsman's firearms. In the same
time the sharp edge which is formed on the bullet in the spot where
the bullet head (CG) continues into cylindrical guiding section of
the bullet (CP) ensures ideally cut shape of the bullet hole in the
target. This is crucial when the bullet is used in sport
firearms.
[0024] Design of the bullet projectile of the invention improves
(as compared to the state of the art) interior ballistics
characteristics (inside the barrel bore), exterior ballistics
characteristics (in the air) and final ballistics characteristics
(in the target) and ensures full stabilization of the bullet flight
path through combining the effects of gyroscopic stabilization, fin
stabilization and edge stabilization, which cannot be achieved
using the known so far designs of bullet projectiles for rifle
firearms.
[0025] According to the invention it is possible to make a
monolithic bullet projectile for rifle firearms in economical way
(wasteless) and simple way (without applying complex machinery and
devices).
[0026] According to the invention, a method of making a monolithic
bullet projectile is characterized by simplicity of technological
process which can be implemented in workshop conditions, even
without mechanical drive. This is crucial in the process of
ammunition reloading in the household or in the field for hunting
or sport purpose.
[0027] According to the invention the following four technological
operations are suitable for making a monolithic bullet projectile
of any caliber and weight: cutting the weighed billet, calibrating
the guiding section of the bullet, cutting the relieving grooves,
calibrating the trailing section of the bullet.
Operation I of Cutting the Weighed Billet
[0028] Scheme of the operation of cutting the starting material for
the bullet and of shaping the bullet head is shown in FIG. 3. Front
view of cutting and shaping operation is show on the left side of
FIG. 3. Side view of cutting and shaping operation is shown on the
right side of FIG. 3.
[0029] Cutting (which includes shaping of bullet head) of the
starting material (1), supplied in the form of either a wire or a
rod, of a diameter which is equal to or higher than a diameter of
lands of final barrel bore of the rifle firearm, to obtain billets
(2) corresponding to the required bullet weight, is performed
through combining the rotary motion (.omega.) of starting material
and radial motion (r) of the adequately shaped cutting roll (3),
against the pair of supporting rolls (4).
[0030] The start of cutting operation is shown in FIG. 3a.
[0031] The end of cutting operation is shown in FIG. 3b.
Operation II of Calibrating the Guiding Section of the Bullet.
[0032] Scheme of the operation of calibrating the guiding section
of the bullet, including finishing the bottom surface, is shown in
FIG. 4.
[0033] Calibrating the guiding section of the bullet (2) up to a
diameter which is equal to or lower than a diameter of the lands
(oP) of the final barrel bore of the firearm is made by redrawing
(s) with a punch (5) in a die (6) having a cone-shaped input hole
and a cylindrical calibrating hole (oP). Pressing the head of the
punch (5) against the bottom section of the bullet results in
simultaneous finishing of the surface of the bullet's bottom (back
flat).
Operation III of Cutting the Relieving Grooves.
[0034] Scheme of the operation of cutting the relieving grooves
including simultaneous profiling of the guiding rings of the bullet
is shown in FIG. 5. Front view of operation of cutting the
relieving grooves is shown on the left side of FIG. 5. Side view of
operation of cutting the relieving grooves is shown on the right
side of FIG. 5.
[0035] Cutting the relieving grooves on the guiding section of the
bullet, including simultaneous profiling of the guiding rings
(through upsetting of the bullet material along both edges of the
radial groove which is being cut off), is made by combining the
rotary motion (.omega.) of the billet (2) and radial motion (r) of
the cutting roll or set of cutting rolls (7) against a pair of
cylindrical supporting rolls (8). Cutting the relieving grooves
should be done such that the depth of the cuts should go deeper
than the diameter of the lands of the final barrel bore of the
firearm, and the height of the upsetting of the guiding rings
should be higher than the depth of the rifles of the final barrel
bore of the firearm.
[0036] The start of cutting operation is show in FIG. 5a.
[0037] The end of cutting operation is shown in FIG. 5b.
Operation IV of Calibrating the Trailing Section of the Bullet.
[0038] Scheme of the operation of calibrating the trailing section
of the bullet is shown in FIG. 6.
[0039] Calibrating the trailing section of the bullet (2) formed of
series of trailing rings, up to a diameter which is equal to or
lower than a diameter of the rifles (oB) of the final barrel bore
is made by one step redrawing (s) using a punch (9) in a die (10)
with an input cone-shaped hole and a cylindrical calibrating hole
(oB).
[0040] According to the invention, independent calibration of a
diameter of lands (oP) and of a diameter of the rifles (oB) allows
for individual fitting of the external dimensions of the bullet to
any barrel of the rifle firearm, even if the wear of the rifle is
significant which is crucial in the process of extending the
lifetime of the firearm.
* * * * *