Ammunition articles with plastic components and method of making ammunition articles with plastic components

• US 6,752,084 B1
• Filed: 03/11/1999
• Issued: 06/22/2004
• Est. Priority Date: 01/15/1999
• Status: Expired due to Term

• Current Assignee: Development Capital Management Company
• Original Assignee: Amtech Systems Corporation (Roper Technologies, Inc.)
• Inventors: Byron, David E., Husseini, Nabil
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): Semunegus, Lulit
• Application Number:
  US09/265,946
• Time in Patent Office: 1,930 Days
• Field of Search: 102/444, 102/466, 102/467, 102/464, 102/470, 102/515, 102/522
• US Class Current: 102/466
• CPC Class Codes: F42B 5/307 formed by assembling several elements

Abstract

An ammunition article includes a molded plastic cartridge casing body having a first end and a second end, and a projectile attached to the first end of the cartridge casing body. The cartridge casing body is molded around at least a portion of the projectile. A molded plastic base for an ammunition article, a molded plastic blank cartridge, and a molded plastic cartridge casing body having a pronged web are also disclosed.

Claims

1. An ammunition article, comprising:

an injection molded plastic cartridge casing body having a first end and a second end the cartridge casing body forming an open tube between the first end and the second end; and

a projectile attached to the first end of the cartridge casing body, the first end of the cartridge casing body being closed only by the projectile,

wherein the cartridge casing body is injection molded around at least a portion of the projectile.

2. The ammunition article as set forth in claim 1, wherein the cartridge casing body includes an interior volume including a first interior portion defined by the portion of the projectile and a second interior portion having a smaller diameter than the first interior portion and being separated from the first interior portion by a shoulder, the shoulder being of sufficient size to prevent axial movement of the projectile into the second interior portion.

3. The ammunition article as set forth in claim 1, wherein the projectile is attached to the cartridge casing body by a heat bond of sufficient strength to prevent axial movement of the projectile relative to the cartridge casing body prior to firing.

4. The ammunition article as set forth in claim 1, wherein the projectile is attached to the cartridge casing body by an adhesive bond of sufficient strength to prevent axial movement of the projectile relative to the cartridge casing body prior to firing.

5. The ammunition article as set forth in claim 1, wherein the projectile is attached to the cartridge casing body by a flange on the cartridge casing body extending into a recess in the projectile.

6. The ammunition article as set forth in claim 1, further comprising a base attached to the second end of the cartridge casing body.

7. The ammunition article as set forth in claim 6, further comprising a propellant charge inside the cartridge casing body.

8. The ammunition article as set forth in claim 7, further comprising a primer for igniting the propellant.

9. The ammunition article as set forth in claim 7, further comprising an electronic ignition for igniting the propellant.

10. The ammunition article as set forth in claim 6, wherein the base is reusable and the cartridge casing body is replaceable.

11. The ammunition article as set forth in claim 6, wherein the base is a molded plastic base.

12. The ammunition article as set forth in claim 6, wherein the base is mechanically attached to the cartridge casing body.

13. The ammunition article as set forth in claim 12, wherein the base is attached to the cartridge casing body by screw threads.

14. The ammunition article as set forth in claim 12, wherein the base is attached to the cartridge casing body by a tongue and groove arrangement.

15. The ammunition article as set forth in claim 12, wherein the base is attached to the cartridge casing body by an interference fit.

16. The ammunition article as set forth in claim 6, wherein the base is attached to the cartridge casing body by adhesive.

17. The ammunition article as set forth in claim 6, wherein the base is attached to the cartridge casing body by a heat bond.

18. The ammunition article as set forth in claim 6, wherein the base is attached to the cartridge casing body by an ultrasonic weld.

19. The ammunition article as set forth in claim 1, wherein the cartridge casing body is formed of a combustible material.

20. The ammunition article as set forth in claim 1, wherein a wall thickness of the cartridge casing body follows cannelure contours of the projectile.

21. An ammunition article comprising:

projectile having cannelure contours; and

a cartridge casing body injection molded around at least a portion of the projectile such that a portion of a wall of the cartridge casing body follows the cannelure contours of the projectile the cartridge casing body forming an open tube between a first end and a second end thereof, and one of the first end and the second end of the cartridge casing body being closed only by the projectile.

22. The ammunition article as set forth in claim 21, wherein the portion of the wall has a substantially constant thickness.

23. An ammunition article comprising:

a projectile; and

a cartridge casing body injection molded around at least part of the projectile so that an end of the projectile and interior wall of the cartridge casing body define a volume open at an end of the cartridge casing body opposite an end closed only by the projectile.