Cartridge and chamber for simulated firearm

• US 8,430,035 B2
• Filed: 09/27/2010
• Issued: 04/30/2013
• Est. Priority Date: 04/27/2004
• Status: Expired due to Fees

• Current Assignee: Charles J. Ducastel Jr
• Original Assignee: Charles J. Ducastel Jr
• Inventors: Ducastel, Charles J. Jr.
• Primary Examiner(s): PARSLEY, DAVID J
• Application Number:
  US12/924,425
• Publication Number:
  US 20110016763A1
• Time in Patent Office: 946 Days
• Field of Search: 102/430, 102/444, 102/465, 102/466, 102/468
• US Class Current: 102/444
• CPC Class Codes: F42B 5/025 characterised by the dimension of the case or the missile
• CPC Class Codes: F42B 8/04 Blank cartridges, i.e. primed cartridges without projectile but containing an explosive or combustible powder charge

Abstract

A blank cartridge and mated blank chamber for simulated firearms incapable of discharging projectiles. The blank cartridge has a case with a cartridge base, a case wall, a cartridge shoulder forming a neck, and a nose enclosing the blank cartridge. The blank cartridge nose provides more reliable feeding from magazines of simulated firearms. The blank cartridge dimensions render it inoperable with ammunition chambers of actual projectile-discharging firearms. The blank chamber dimensions render it inoperable with ammunition cartridges. Upon discharge the blank cartridge and chamber release exhaust gases in a forward direction, creating realistic visual and auditory effects.

Claims

1. A blank cartridge, comprising a case, a cartridge base, a case wall extending from said base, with said case wall having a diameter with a reverse taper, a cartridge shoulder at the end of the case wall, said cartridge shoulder forming a cartridge neck, and a nose extending from said cartridge shoulder and said cartridge neck, and said nose enclosing said blank cartridge;

and said blank cartridge having the following dimensions;

base diameter of between 0.353 and 0.383 inches with a tolerance of 0.005 inches, case wall length from said base to juncture of shoulder 0.75 inches with a tolerance of 0.01 inch, external case wall diameter at juncture with said cartridge shoulder and said cartridge neck between 0.342 and 0.371 inches with a tolerance of 0.005 inches, and external diameter of said nose at the juncture with said cartridge shoulder and said cartridge neck of not greater than 0.325 inches with a tolerance of 0.005 inches.

2. A blank cartridge as defined in claim 1, wherein said blank cartridge has a total length from said cartridge base to said nose of between about 0.980 inches and 1.230 inches, with a tolerance of 0.005 inches.

3. A blank cartridge as defined in claim 2, wherein said nose of said blank cartridge has a maximum diameter of less than 0.323 inches with a tolerance of 0.005 inches.

4. A blank cartridge as defined in claim 3, wherein said nose of said blank cartridge has a maximum diameter of less than 0.320 inches with a tolerance of 0.005 inches.

5. The blank cartridge as defined in claim 2, wherein said blank cartridge has a cartridge shoulder angle of about 30 to 45 degrees.

6. The blank cartridge as defined in claim 2, wherein said blank cartridge has a primer.

7. The blank cartridge as defined in claim 2, wherein said blank cartridge has propellant.

8. A blank cartridge as defined in claim 2, wherein said blank cartridge has a metallic case.

9. A blank cartridge as defined in claim 2, wherein said blank cartridge has a non-metallic case.

10. A blank cartridge as defined in claim 2, wherein said blank cartridge has one flash path.

11. A blank cartridge as defined in claim 2, wherein said blank cartridge has two flash paths.

12. The blank cartridge as defined in claim 7, wherein said propellant is Bullseye powder.

13. The blank cartridge as defined in claim 12, wherein said propellant comprises between 6.5 and 8.0 grains weight of Bullseye powder.

14. The blank cartridge as defined in claim 7, wherein said propellant is 231 powder.

15. The blank cartridge as defined in claim 14, wherein said propellant comprises between 6.8 and 8.2 grains weight of 231 powder.

16. A case for a blank cartridge, comprising a cartridge base, a case wall extending from said base, with said case wall having a diameter with a reverse taper, a cartridge shoulder at the end of the case wall, said cartridge shoulder forming a cartridge neck, and a nose extending from said cartridge shoulder and said cartridge neck and enclosing said case;

and said case having the following dimensions;

base diameter of 0.378 inches with a tolerance of 0.005 inches, case wall length from said base to juncture of shoulder 0.75 inches with a tolerance of 0.01 inch, external case wall diameter at juncture with said cartridge shoulder and said cartridge neck between 0.342 and 0.371 inches with a tolerance of 0.005 inches, and external diameter of said nose at the juncture with said cartridge shoulder and said cartridge neck of not greater than 0.325 inches with a tolerance of 0.005 inches.

17. A case as defined in claim 16, wherein said case has a total length from said cartridge base to said nose of between 0.980 inches and 1.230 inches, with a tolerance of 0.005 inches.

18. A case as defined in claim 17, wherein said nose of said case has a maximum diameter of less than 0.323 inches with a tolerance of 0.005 inches.

19. A case as defined in claim 17, wherein the said nose of said case has a maximum diameter of less than 0.320 inches with a tolerance of 0.005 inches.

20. A blank chamber for a simulated firearm, comprising:

a base with a base diameter of 0.38 inches with a tolerance of 0.01 inch;

a first body bore extending from said base defining a generally cylindrical first body bore body cavity having a first body bore inside length of 0.61 inches with a tolerance of 0.01 inch;

a chamber shoulder connected to said first body bore cavity, said chamber shoulder forming a chamber neck;

a second body bore extending from said combined chamber shoulder and chamber neck defining a generally cylindrical second body bore body cavity, and a second body bore inside diameter of 0.332 inches with a tolerance of 0.005 inches at the juncture of said chamber shoulder.