US3808974A - All plastic shotshell case with transversely oriented undulations on outer cylindrical surface - Google Patents

All plastic shotshell case with transversely oriented undulations on outer cylindrical surface Download PDF

Info

Publication number
US3808974A
US3808974A US00196627A US19662771A US3808974A US 3808974 A US3808974 A US 3808974A US 00196627 A US00196627 A US 00196627A US 19662771 A US19662771 A US 19662771A US 3808974 A US3808974 A US 3808974A
Authority
US
United States
Prior art keywords
sidewall
undulations
shotshell
plastic
base wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00196627A
Inventor
G Herter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HERTER Inc S
HERTER S INC US
Original Assignee
HERTER Inc S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HERTER Inc S filed Critical HERTER Inc S
Priority to US00196627A priority Critical patent/US3808974A/en
Application granted granted Critical
Publication of US3808974A publication Critical patent/US3808974A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/26—Cartridge cases
    • F42B5/30—Cartridge cases of plastics, i.e. the cartridge-case tube is of plastics

Definitions

  • ABSTRACT An all plastic shotshell case molded with the transverse base wall and cylindrical sidewall integral of and in one piece with each other, and the outer surface of the cylindrical sidewall having undulations all along the length thereof and oriented transversely of the longitudinal orientation of the cylindrical sidewall, said transverse undulations forming rings extending circumferentially around the cylindrical sidewall, or said undulations being in the pattern of circles, dots,v squares, knurls or other shapes.
  • Such undulations may be arranged in any of a number of patterns on the outer surface of the sidewall, and it has been found advantageous to arrange such undulations so that rings are formed extending circumferentially around the entire periphery of the cylindrical sidewalls, and all along the length of the sidewall case.
  • the result is to strengthen the walls of the case, and this is caused, at least in part, because during the filling of the mold in which the shotshell case is formed, the plastic is flowed into the mold cavity in a direction longitudinally of the cylindrical sidewall being formed, and therefore across the undulations in the mold part forming the outer surface of the cylindrical sidewall.
  • the molten plastic during filling of the mold cavity, flows across these undulations in the mold part and causes some degree of laminating of the plastic during the flow which results in the increased strength of the plastic after the plastic is allowed to cure and harden.
  • the undulations, oriented transversely of the longitudinal orientation of the cylindrical sidewall may be arranged in various patterns such as the rings extending circumferentially of the cylindrical sidewall, but the pattern may take the form of circles, dots, squares, knurls or any other convenient shape which nests together into an overlapping relation and which have at least a portion thereof extending transversely of the longitudinal orientation of the cylindrical sidewall.
  • FIG. 1 is an enlarged elevation view, partly broken away, and in section, and illustrating a shotshell case according to the present invention, and illustrating the open mouth of the case closed with the usual star crimp.
  • FIG. 2 is a greatly enlarged longitudinal section view taken approximately at 22 in FIG. 1.
  • FIG. 3 is a fragmented detail view showing a small portion of the mold parts used in molding the all plastic shotshell case illustrated in FIGS. 1 and 2 to carry out the invention.
  • FIG. 4 is a greatly enlarged detail elevation view of the outer surface of a cylindrical shotshell sidewall, and illustrating a modified form of the invention.
  • FIG. 5 is a view similar to FIG. 4 and illustrating a second modified form of the invention.
  • the all plastic shotshell case is indicated in general by numeral and includes a transversely oriented base wall 11 and an elongate, substantially cylindrical sidewall 12.
  • the base wall 11 and the sidewall 12 are molded integrally of and in one piece with respect to each other, and are formed of any of a number of plastics suitable for molding all plastic shotshell cases, such as linear polyethylene, or an extrusion grade polyethylene material which is somewhat stiffer in consistency when injected into the mold cavity than other polyethylenes.
  • the base wall of the shotshell case has an opening 13 therein to receive the primer of the shotshell, and the shotshell case has an open interior 14 for receiving the usual powder charge, wadding, and shot charge which, when added to the case and primer, make up the loaded shotshell.
  • the integral closure 15 is shown in the position of a star crimp for illustration purposes, even though no powder or shot charge is contained in the shotshell.
  • the substantially cylindrical sidewall 12 is provided with a series of undulations 16a and 16b which are actuall-y grooves and ribs or ridges respectively, extending circumferentially around the entire periphery of the substantially cylindrical wall 12. It is pointed out that the undulations 16a and 16b are provided on the outer surface of the sidewall, throughout substantially the entire length of the sidewall, and substantially strengthen the case sidewall.
  • the spacing between undulations may be varied at various locations along the length of the case sidewall, and in this form illustrated, the undulations 16a and 16b are smaller than the spacings between undulations along other portions of the case sidewall.
  • the ribs and grooves formed by the undulations 16a and 16b form a more efficient sealing relationship with the chamber of the shotgun barrel when the case is fired, due to the extreme magnitude of gas pressure that builds up at the inner chamber 14 of the shotshell case upon firing of the shotshell and deformation of the plastic against the barrel wall at the ribforming undulations 16b.
  • FIG. 3 illustrates the molding of the shotshell case sidewall and shows a fragmented portion of the mold assembly which includes the mold part 20 which cooperates with the core 21 to define the mold cavity 22 therebetween.
  • the mold cavity is correspondingly substantially cylindrically shaped to conform to the shape of the substantially cylindrical sidewall 12, and of course, the mold cavity 22 also extends across the end of the core to shape the plastic which forms the base wall 1 1 of the shotshell case.
  • the mold part 20 has undulations 20a and 20b in its surface which form the outer surface of the substantially cylindrical sidewall 12.
  • the molten plastic 23 is flowed. in a direction longitudinally along the core 21 and longitudinally of the substantially cylindrical mold cavity 22, as indicated by the direction of arrow A. Because of this flow of the plastic material, the transversely oriented undulations 20a and 20b are encountered as the plastic flows in the direction of arrow A and because of the drag or restriction to flow at the undulations 20a,
  • the plastic As it flows, has a shear location 23.1 as indicated by the dotted lines in FIG. 3, outwardly of which the plastic is retarded in movement and inwardly of which the plastic flows with full velocity in the direction of arrow A.
  • the resulting all plastic shotshell case 10 has an increased strength in the substantially cylindrical sidewall 12- due to the presence of the undulations and rings around the periphery thereof.
  • the outer surface of the sidewall 12.] is provided with a plurality of undulations l2.la and l2.lb forming patterns on the outer surface of the sidewall in the form of a plurality of clustered circular annuli having a height similar to that of the undulations 16a and 16b illustrated in FIG. 1 wherein these undulations have a magnitude in a direction transversely of the case sidewall which is considerably less than the thickness of the sidewall.
  • the circular annuli formed by the undulations 12.10 and l2.lb have portions oriented transversely of the elongate substantially cylindrical sidewall case 12.1
  • FIG. another form of the invention is illustrated wherein the substantially cylindrical sidewall 12.2 is provided with a plurality of undulations 12.2a and 12.2b arranged in a pattern forming closely nested squares or rectangles. It will be noted that portions of the undulations 12.2a and 12.2b are oriented transversely of the longitudinal orientation of the substantially cylindrical sidewall.
  • the undulations on the outer surface of the sidewall may be arranged in other patterns including dots, diamonds, knurls, or any of the other common geometric shapes, which have a portion oriented transversely or at least obliquely transversely of the longitudinal orientation of the sidewall case.
  • An all plastic shotshell case comprising:
  • a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell;
  • said undulations being formed integrally with said sidewall and extending in longitudinally spaced circular patterns over more than one half of the length of said sidewall up to and along said open end thereof, and said undulations being in the form of circumferentially extending rings of varying width in a direction along the length of said cylindrical sidewall, with the narrower rings being disposed adjacent said open end of said sidewall and being deformable against a shotgun barrel under the pressure developed within said shotshell case upon firing.
  • said undulations comprise a plurality of closely clustered annuli of circular shape.
  • An all plastic shotshell comprising:
  • a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell;

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

An all plastic shotshell case molded with the transverse base wall and cylindrical sidewall integral of and in one piece with each other, and the outer surface of the cylindrical sidewall having undulations all along the length thereof and oriented transversely of the longitudinal orientation of the cylindrical sidewall, said transverse undulations forming rings extending circumferentially around the cylindrical sidewall, or said undulations being in the pattern of circles, dots, squares, knurls or other shapes.

Description

i] ite tates Herter atent H 1 [451 May 7,1974
[ ALL PLASTIC SHOTSHELL CASE WITH TRANSVERSELY ORIENTED UNDULATIONS ON OUTER CYLINDRHCAL SURFACE [75] Inventor:
[73] Assignee: Herters Inc., Waseca, Minn.
[22] Filed: Nov. 8, 1971 [21] Appl. No.: 196,627
George L. Herter, Waseca, Minn.
[52] US. Cl. 102/43 P [51] Int. Cl. F42b 7/06 [58] Field of Search 102/42 R, 43 R, 43 P [56] References Cited UNITED STATES PATENTS 185,548 12/1876 Kinney 102/43 R 3,363,562 1/1968 Stadler et al. 102/43 P FOREIGN PATENTS OR APPLICATIONS 1,448,965 8/1966 France 102/43 P 1,114,134 5/1968 Great Britain 102/43 P Primary Examiner-Stephen C. Bentley Attorney, Agent, or FirmWilliamson, Bains & Moore [5 7] ABSTRACT An all plastic shotshell case molded with the transverse base wall and cylindrical sidewall integral of and in one piece with each other, and the outer surface of the cylindrical sidewall having undulations all along the length thereof and oriented transversely of the longitudinal orientation of the cylindrical sidewall, said transverse undulations forming rings extending circumferentially around the cylindrical sidewall, or said undulations being in the pattern of circles, dots,v squares, knurls or other shapes.
3 Claims, 5 Drawing Figures PATENTEBIAY 7:914
Q INVENTOR BY g'eor ye L.Herter 90%4 yam ATTOE/VEV ALL PLASTIC SHOTSHELL CASE WITH TRANSVERSELY ORIENTED UNDULATIONS ON OUTER CYLINDRICAL SURFACE BRIEF SUMMARY OF THE INVENTION It has been found that all plastic shotshell cases wherein the transverse base wall and the cylindrical sidewall are integral of and in one piece with each other and are molded of any of a number of types of plastic such as linear polyethylene, will have more strength where the outer surface of the cylindrical sidewall is provided with a plurality of shallow undulations throughout the entire length of the cylindrical sidewall. Such undulations may be arranged in any of a number of patterns on the outer surface of the sidewall, and it has been found advantageous to arrange such undulations so that rings are formed extending circumferentially around the entire periphery of the cylindrical sidewalls, and all along the length of the sidewall case. The result is to strengthen the walls of the case, and this is caused, at least in part, because during the filling of the mold in which the shotshell case is formed, the plastic is flowed into the mold cavity in a direction longitudinally of the cylindrical sidewall being formed, and therefore across the undulations in the mold part forming the outer surface of the cylindrical sidewall. The molten plastic, during filling of the mold cavity, flows across these undulations in the mold part and causes some degree of laminating of the plastic during the flow which results in the increased strength of the plastic after the plastic is allowed to cure and harden.
It has been found that the undulations, oriented transversely of the longitudinal orientation of the cylindrical sidewall may be arranged in various patterns such as the rings extending circumferentially of the cylindrical sidewall, but the pattern may take the form of circles, dots, squares, knurls or any other convenient shape which nests together into an overlapping relation and which have at least a portion thereof extending transversely of the longitudinal orientation of the cylindrical sidewall.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an enlarged elevation view, partly broken away, and in section, and illustrating a shotshell case according to the present invention, and illustrating the open mouth of the case closed with the usual star crimp.
FIG. 2 is a greatly enlarged longitudinal section view taken approximately at 22 in FIG. 1.
FIG. 3 is a fragmented detail view showing a small portion of the mold parts used in molding the all plastic shotshell case illustrated in FIGS. 1 and 2 to carry out the invention.
FIG. 4 is a greatly enlarged detail elevation view of the outer surface of a cylindrical shotshell sidewall, and illustrating a modified form of the invention.
FIG. 5 is a view similar to FIG. 4 and illustrating a second modified form of the invention.
DETAILED DESCRIPTION OF THE INVENTION The all plastic shotshell case is indicated in general by numeral and includes a transversely oriented base wall 11 and an elongate, substantially cylindrical sidewall 12. The base wall 11 and the sidewall 12 are molded integrally of and in one piece with respect to each other, and are formed of any of a number of plastics suitable for molding all plastic shotshell cases, such as linear polyethylene, or an extrusion grade polyethylene material which is somewhat stiffer in consistency when injected into the mold cavity than other polyethylenes. The base wall of the shotshell case has an opening 13 therein to receive the primer of the shotshell, and the shotshell case has an open interior 14 for receiving the usual powder charge, wadding, and shot charge which, when added to the case and primer, make up the loaded shotshell. In the drawings, the integral closure 15 is shown in the position of a star crimp for illustration purposes, even though no powder or shot charge is contained in the shotshell.
The substantially cylindrical sidewall 12 is provided with a series of undulations 16a and 16b which are actuall-y grooves and ribs or ridges respectively, extending circumferentially around the entire periphery of the substantially cylindrical wall 12. It is pointed out that the undulations 16a and 16b are provided on the outer surface of the sidewall, throughout substantially the entire length of the sidewall, and substantially strengthen the case sidewall.
It will be noted that the spacing between undulations may be varied at various locations along the length of the case sidewall, and in this form illustrated, the undulations 16a and 16b are smaller than the spacings between undulations along other portions of the case sidewall. The ribs and grooves formed by the undulations 16a and 16b form a more efficient sealing relationship with the chamber of the shotgun barrel when the case is fired, due to the extreme magnitude of gas pressure that builds up at the inner chamber 14 of the shotshell case upon firing of the shotshell and deformation of the plastic against the barrel wall at the ribforming undulations 16b.
FIG. 3 illustrates the molding of the shotshell case sidewall and shows a fragmented portion of the mold assembly which includes the mold part 20 which cooperates with the core 21 to define the mold cavity 22 therebetween. The mold cavity is correspondingly substantially cylindrically shaped to conform to the shape of the substantially cylindrical sidewall 12, and of course, the mold cavity 22 also extends across the end of the core to shape the plastic which forms the base wall 1 1 of the shotshell case. The mold part 20 has undulations 20a and 20b in its surface which form the outer surface of the substantially cylindrical sidewall 12. As illustrated, the molten plastic 23 is flowed. in a direction longitudinally along the core 21 and longitudinally of the substantially cylindrical mold cavity 22, as indicated by the direction of arrow A. Because of this flow of the plastic material, the transversely oriented undulations 20a and 20b are encountered as the plastic flows in the direction of arrow A and because of the drag or restriction to flow at the undulations 20a,
20b, there is laminating of the plastic during the flow I and a resultant strengthening of the case sidewall after the case is allowed to cure and harden. Of course, because of the undulations, the plastic, as it flows, has a shear location 23.1 as indicated by the dotted lines in FIG. 3, outwardly of which the plastic is retarded in movement and inwardly of which the plastic flows with full velocity in the direction of arrow A.
The resulting all plastic shotshell case 10 has an increased strength in the substantially cylindrical sidewall 12- due to the presence of the undulations and rings around the periphery thereof.
In the form illustrated in FIG. 4, the outer surface of the sidewall 12.] is provided with a plurality of undulations l2.la and l2.lb forming patterns on the outer surface of the sidewall in the form of a plurality of clustered circular annuli having a height similar to that of the undulations 16a and 16b illustrated in FIG. 1 wherein these undulations have a magnitude in a direction transversely of the case sidewall which is considerably less than the thickness of the sidewall. It will be noted that the circular annuli formed by the undulations 12.10 and l2.lb have portions oriented transversely of the elongate substantially cylindrical sidewall case 12.1
In FIG. another form of the invention is illustrated wherein the substantially cylindrical sidewall 12.2 is provided with a plurality of undulations 12.2a and 12.2b arranged in a pattern forming closely nested squares or rectangles. It will be noted that portions of the undulations 12.2a and 12.2b are oriented transversely of the longitudinal orientation of the substantially cylindrical sidewall.
It should be understood that the undulations on the outer surface of the sidewall may be arranged in other patterns including dots, diamonds, knurls, or any of the other common geometric shapes, which have a portion oriented transversely or at least obliquely transversely of the longitudinal orientation of the sidewall case.
It will be seen that l have provided a new and improved all plastic shotshell case wherein the outer surface of the substantially cylindrical sidewall is provided with undulations arranged in a pattern with portions extending transversely of the elongate longitudinal orientation of the substantially cylindrical sidewall effecting a strengthening of the sidewall against outward expansion and rupture due to pressure developed within the case.
What is claimed is:
1. An all plastic shotshell case comprising:
a substantially cylindrical sidewall of molded plastic open at one end;
a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell; and
a plurality of undulations on the outer surface of said sidewall projecting outwardly therefrom, said undulations being formed integrally with said sidewall and extending in longitudinally spaced circular patterns over more than one half of the length of said sidewall up to and along said open end thereof, and said undulations being in the form of circumferentially extending rings of varying width in a direction along the length of said cylindrical sidewall, with the narrower rings being disposed adjacent said open end of said sidewall and being deformable against a shotgun barrel under the pressure developed within said shotshell case upon firing.
2. An all plastic shotshell as defined in claim 1 wherein:
said undulations comprise a plurality of closely clustered annuli of circular shape.
3. An all plastic shotshell comprising:
a substantially cylindrical sidewall of molded plastic open at one end;
a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell; and
open end of said sidewall.

Claims (3)

1. An all plastic shotshell case comprising: a substantially cylindrical sidewall of molded plastic open at one end; a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell; and a plurality of undulations on the outer surface of said sidewall projecting outwardly therefrom, said undulations being formed integrally with said sidewall and extending in longitudinally spaced circular patterns over more than one half of the length of said sidewall up to and along said open end thereof, and said undulations being in the form of circumferentially extending rings of varying width in a direction along the length of said cylindrical sidewall, with the narrower rings being disposed adjacent said open end of said sidewall and being deformable against a shotgun barrel under the pressure developed within said shotshell case upon firing.
2. An all plastic shotshell as defined in claim 1 wherein: said undulations comprise a plurality of closely clustered annuli of circular shape.
3. An all plastic shotshell comprising: a substantially cylindrical sidewall of molded plastic open at one end; a base wall of molded plastic extending transversely of said sidewall at the opposite end thereof, said sidewall and base wall being formed integrally as one piece, and said base wall having an opening therein to receive the primer of the shotshell; and a plurality of undulations on the outer surface of said sidewall projecting outwardly therefrom, said undulations extending transversely with respect to said cylindrical sidewall in generally circular patterns over a substantial portion of the length of said sidewall up to and along said open end thereof, and said undulations being of varying width in a direction along the length of said sidewall with the narrowest undulations being disposed adjacent said open end of said sidewall.
US00196627A 1971-11-08 1971-11-08 All plastic shotshell case with transversely oriented undulations on outer cylindrical surface Expired - Lifetime US3808974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00196627A US3808974A (en) 1971-11-08 1971-11-08 All plastic shotshell case with transversely oriented undulations on outer cylindrical surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00196627A US3808974A (en) 1971-11-08 1971-11-08 All plastic shotshell case with transversely oriented undulations on outer cylindrical surface

Publications (1)

Publication Number Publication Date
US3808974A true US3808974A (en) 1974-05-07

Family

ID=22726175

Family Applications (1)

Application Number Title Priority Date Filing Date
US00196627A Expired - Lifetime US3808974A (en) 1971-11-08 1971-11-08 All plastic shotshell case with transversely oriented undulations on outer cylindrical surface

Country Status (1)

Country Link
US (1) US3808974A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662283A (en) * 1985-12-23 1987-05-05 Chang Hsien Yang Toy railroad able to change the toy traffic direction
US4986186A (en) * 1988-11-01 1991-01-22 General Dynamics Corporation Air Defense Systems Division, Pomona Facility High peak pressure notched cartridge case
US20120024183A1 (en) * 2010-07-30 2012-02-02 Mnp Corporation Cartridge Base and Plastic Cartridge Case Assembly for Ammunition Cartridge
US8443730B2 (en) 2011-01-14 2013-05-21 Pcp Tactical, Llc High strength polymer-based cartridge casing and manufacturing method
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US8807008B2 (en) 2011-01-14 2014-08-19 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
US8869702B2 (en) 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US9534876B2 (en) 2013-05-28 2017-01-03 Ra Brands, L.L.C. Projectile and mold to cast projectile
US9778002B2 (en) 2013-12-20 2017-10-03 Ra Brands, L.L.C. Shot cup wad
US10794671B2 (en) 2011-01-14 2020-10-06 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US185548A (en) * 1876-12-19 Improvement in cartridge-shells
FR1448965A (en) * 1965-06-29 1966-03-18 Hunting cartridge case
US3363562A (en) * 1963-10-29 1968-01-16 Dynamit Nobel Ag Cartridge case
GB1114134A (en) * 1964-08-12 1968-05-15 Mueanyagipari Ki Plastic cartridge case

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US185548A (en) * 1876-12-19 Improvement in cartridge-shells
US3363562A (en) * 1963-10-29 1968-01-16 Dynamit Nobel Ag Cartridge case
GB1114134A (en) * 1964-08-12 1968-05-15 Mueanyagipari Ki Plastic cartridge case
FR1448965A (en) * 1965-06-29 1966-03-18 Hunting cartridge case

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4662283A (en) * 1985-12-23 1987-05-05 Chang Hsien Yang Toy railroad able to change the toy traffic direction
US4986186A (en) * 1988-11-01 1991-01-22 General Dynamics Corporation Air Defense Systems Division, Pomona Facility High peak pressure notched cartridge case
US20120024183A1 (en) * 2010-07-30 2012-02-02 Mnp Corporation Cartridge Base and Plastic Cartridge Case Assembly for Ammunition Cartridge
US9989343B2 (en) 2010-07-30 2018-06-05 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US8573126B2 (en) * 2010-07-30 2013-11-05 Pcp Tactical, Llc Cartridge base and plastic cartridge case assembly for ammunition cartridge
US9599443B2 (en) 2010-07-30 2017-03-21 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US8807008B2 (en) 2011-01-14 2014-08-19 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US9995561B2 (en) 2011-01-14 2018-06-12 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge for blank and subsonic ammunition
US8869702B2 (en) 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US8875633B2 (en) 2011-01-14 2014-11-04 Pcp Tactical, Llc Adhesive lip for a high strength polymer-based cartridge casing and manufacturing method
US9003973B1 (en) 2011-01-14 2015-04-14 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US9194680B2 (en) 2011-01-14 2015-11-24 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US9261335B2 (en) 2011-01-14 2016-02-16 Pcp Tactical, Llc Frangible portion for a high strength polymer-based cartridge casing and manufacturing method
US9372054B2 (en) 2011-01-14 2016-06-21 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US11976911B2 (en) 2011-01-14 2024-05-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US11353299B2 (en) 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US10794671B2 (en) 2011-01-14 2020-10-06 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US8443730B2 (en) 2011-01-14 2013-05-21 Pcp Tactical, Llc High strength polymer-based cartridge casing and manufacturing method
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
USD765214S1 (en) 2012-01-13 2016-08-30 Pcp Tactical, Llc Radiused insert
US9534876B2 (en) 2013-05-28 2017-01-03 Ra Brands, L.L.C. Projectile and mold to cast projectile
US9778002B2 (en) 2013-12-20 2017-10-03 Ra Brands, L.L.C. Shot cup wad
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios

Similar Documents

Publication Publication Date Title
US3808974A (en) All plastic shotshell case with transversely oriented undulations on outer cylindrical surface
US3491691A (en) Shell casing and its method of manufacture
US4296687A (en) Segmented sabot projectile
US4254960A (en) Sealing device
US3186340A (en) Explosive container with yieldable seal
US3269311A (en) Shotgun cartridge
US5970878A (en) Universal shot wad
US3162124A (en) Plastic cartridge
US2684502A (en) Method of making cartridges
US4419318A (en) Process for forming projectiles for smooth bore shooting guns
US4290365A (en) Shotshells
US3812784A (en) One piece wad column and shot cup
US3722420A (en) Tapered cup wad
US3420178A (en) Wad for shotgun shells
US3565010A (en) Plastic wad column
US3022734A (en) Shot shell wad
US3359903A (en) Plastic shotgun shell
US3559581A (en) Method of manufacture of thin-walled plastic shell casings
US4321225A (en) Method for making a hatch cover with a seal
US5861572A (en) Universal shotgun shell wad
US3730664A (en) Mold apparatus for making a closure cap
US3185095A (en) Cartridge case head
US3673965A (en) Over-shot wad for shotshells
US3678858A (en) All plastic polycarbonate shot shell with star crimp
US3221658A (en) Shot-gun cartridge and wad therefor