US2018335284A1PendingUtilityA1
.308 Subsonic Bullet
Est. expiryJul 3, 2035(~8.9 yrs left)· nominal 20-yr term from priority
F42B 10/02F42B 30/02F42B 12/78F42B 5/025F42B 12/74F42B 10/46F42B 10/44
29
PatentIndex Score
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Cited by
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Claims
Abstract
The invention here described of novel aerodynamics and construction has been shown to alleviate the problems inherent in subsonic ballistics, such as, but not limited to, tumbling in flight, loss of impact energy, as well as the changes in both accuracy and precision of the firearm shots fired at subsonic speeds. The subsonic bullet herein described has three main aerodynamic components that aid in subsonic flight: 1) a parabolic or hemispherical nose; 2) a cylindrical center length with parallel sides; 3) a cone-like parabolic tail with an optimized tail geometry to slowly converge the laminar flow around the bullet without introducing turbulence. These features serve to reduce air pressure and turbulent airflow around the bullet during flight.
Claims
exact text as granted — not AI-modifiedWe claim:
1 . A bullet for subsonic applications, comprising:
a. a parabolic nose; b. a nose section comprised of a material having a density greater than or equal to 11.0 g/cm 3 , but less than 19.3 g/cm 3 ; c. a cylindrical midsection; d. a cone-like parabolic tail; e. a tail section comprised of a material having a density less than or equal to 3.0 g/cm 3 ; and f. an outer shell, wherein said outer shell is comprised of copper.
2 . The bullet of claim 1 , where said cylindrical midsection is of appropriate diameter to be utilized with a standard caliber casing.
3 . The bullet of claim 2 where said standard caliber casing is a .308 caliber casing.
4 . The bullet of claim 2 where said cone-like parabolic tail and tail section extend into the interior of said standard caliber casing.
5 . The bullet of claim 1 , where said nose section is comprised of lead.
6 . The bullet of claim 1 where said tail section is comprised of aluminum.
7 . The bullet of claim 1 where said tail section is comprised of magnesium.
8 . A bullet for subsonic applications, comprising:
a. a hemispheric nose; b. a nose section comprised of a material having a density greater than or equal to 11.0 g/cm 3 , but less than 19.3 g/cm 3 ; c. a cylindrical midsection; d. a cone-like parabolic tail; e. a tail section comprised of a material having a density less than or equal to 3.0 g/cm 3 ; and f. an outer shell, wherein said outer shell is comprised of copper.
9 . The bullet of claim 8 , where said cylindrical midsection is of appropriate diameter to be utilized with a standard caliber casing.
10 . The bullet of claim 9 where said standard caliber casing is a .308 caliber casing.
11 . The bullet of claim 10 where said cone-like parabolic tail and tail section extend into the interior of said standard caliber casing.
12 . The bullet of claim 8 , where said nose section is comprised of lead.
13 . The bullet of claim 8 where said tail section is comprised of aluminum.
14 . The bullet of claim 8 where said tail section is comprised of magnesium.
15 . A .308 bullet optimized for subsonic applications comprising:
a. a hemispheric nose defined by the equation:
r=√{square root over (x 2 +y 2 )};
b. a nose section comprised of a material having a density greater than or equal to 11.0 g/cm 3 , but less than 19.3 g/cm 3 ; c. a cylindrical midsection that is .308 inches in diameter; d. a cone-like parabolic tail defined by the equation:
y
t
=
D
0.308
*
[
0.01605
*
(
x
c
)
4
+
0.0322
*
(
x
c
)
3
-
0.1699
*
(
x
c
)
2
-
0.02335
*
(
x
c
)
+
0.154
]
;
e. a tail section comprised of a material having a density less than or equal to 3.0 g/cm 3 ; and
f. an outer shell, wherein said outer shell is comprised of copper.
16 . The bullet of claim 15 where said cylindrical midsection is of appropriate diameter to be utilized with a .308 caliber casing and where said cone-like parabolic tail and tail section extend into the interior of said .308 caliber casing.
17 . The bullet of claim 15 , where said nose section is comprised of lead.
18 . The bullet of claim 15 where said tail section is comprised of aluminum.
19 . The bullet of claim 15 where said tail section is comprised of magnesium.
20 . A .308 bullet optimized for subsonic applications comprising:
a. a parabolic nose defined by the equation: y 2 =4PX . b. a nose section comprised of a material having a density greater than or equal to 11.0 g/cm 3 , but less than 19.3 g/cm 3 ; c. a cylindrical midsection that is .308 inches in diameter; d. a cone-like parabolic tail defined by the equation:
y
t
=
D
0.308
*
[
0.01605
*
(
x
c
)
4
+
0.0322
*
(
x
c
)
3
-
0.1699
*
(
x
c
)
2
-
0.02335
*
(
x
c
)
+
0.154
]
;
e. a tail section comprised of a material having a density less than or equal to 3.0 g/cm 3 ; and
f. an outer shell, wherein said outer shell is comprised of copper.
21 . The bullet of claim 20 where said cylindrical midsection is of appropriate diameter to be utilized with a .308 caliber casing and where said cone-like parabolic tail and tail section extend into the interior of said .308 caliber casing.
22 . The bullet of claim 20 , where said nose section is comprised of lead.
23 . The bullet of claim 22 , where said nose section comprised of lead extends to 1.08 inches behind the tip of said parabolic nose.
24 . The bullet of claim 20 where said tail section is comprised of aluminum.
25 . The bullet of claim 20 where said tail section is comprised of magnesium.
26 . The bullet of claim 22 where the center of mass of said nose section is located .54 inches behind the tip of said parabolic nose.
27 . The bullet of claim 22 where the lead weight of said nose section is .0208 lbf.
28 . The bullet of claim 20 where the center of mass of said outer shell comprised of copper is located .93 inches behind the tip of said parabolic nose.
29 . The bullet of claim 28 where said outer shell of copper weight is .0125 lbf.
30 . The bullet of claim 25 where the center of mass of said tail section is located 1.33 inches behind the tip of said parabolic nose.
31 . The bullet of claim 30 where said tail section magnesium weight is .0012 lbf.
32 . The bullet of claim 20 where the center of mass of said bullet is located .71 inches behind the tip of said parabolic nose.
33 . The bullet of claim 20 where the overall length of said bullet is 2.08 inches.
34 . The bullet of claim 20 where the weight of said bullet is .0345 lbf (241.5 grains).
35 . A .308 bullet optimized for subsonic applications comprising:
a. a parabolic nose defined by the equation: y 2 =4PX ; b. a nose section comprised of lead, where said nose section comprised of lead extends to 1.08 inches behind the tip of said parabolic nose, where the center of mass of said nose section is located .54 inches behind the tip of said parabolic nose, where the lead weight of said nose section is .0208 lbf.; c. a cylindrical midsection that is .308 inches in diameter, where said cylindrical midsection is of appropriate diameter to be utilized with a .308 caliber casing; d. a cone-like parabolic tail defined by the equation:
y
t
=
D
0.308
*
[
0.01605
*
(
x
c
)
4
+
0.0322
*
(
x
c
)
3
-
0.1699
*
(
x
c
)
2
-
0.02335
*
(
x
c
)
+
0.154
]
;
e. a tail section comprised of magnesium, where said cone-like parabolic tail and tail section extends into the interior of a .308 caliber casing; where the center of mass of said tail section is located 1.33 inches behind the tip of said parabolic nose, where said tail section magnesium weight is .0012 lbf.;
f. an outer shell, wherein said outer shell is comprised of copper, where the center of mass of said outer shell comprised of copper is located .93 inches behind the tip of said parabolic nose, where said outer shell of copper weight is .0125 lbf.;
g. where the center of mass of said .308 bullet is located .71 inches behind the tip of said parabolic nose;
h. where the overall length of said .308 bullet is 2.08 inches; and
i. where the weight of said bullet is .0345 lbf (241.5 grains).Join the waitlist — get patent alerts
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