IP Library › Granted Patent US 7,984,581
Granted Patent B2
US 7,984,581 · App. 12/008,487 · Granted Jul 26, 2011

Projectile accelerator and related vehicle and method

Assignee: Lockheed Martin Corporation
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Quick Facts
Patent No.
US 7,984,581
App. No.
12/008,487
Granted
Jul 26, 2011
Kind
B2
Abstract

An unguided projectile-accelerator system includes an enclosure, first and second charges, first and second projectiles, and a recoil-absorbing mechanism. The enclosure has an open first end and a closed second end, and the first and second charges are disposed within the enclosure. The first projectile is disposed within the enclosure between the first charge and the first end and is operable to exit the enclosure via the first end and to generate a first recoil in response to detonation of the first charge. The second projectile is disposed within the enclosure between the first charge and the second charge and is operable to exit the enclosure via the first end and to generate a second recoil in response to detonation of the second charge. The recoil-absorbing mechanism is disposed adjacent to the enclosure and is operable to absorb at least a respective portion of each of the first and second recoil.

Claims (58)

1. A projectile accelerator, comprising:

a first enclosure having an open first end and a closed second end;

first and second charges disposed within the first enclosure;

a first projectile disposed within the first enclosure between the first charge and the first end and operable to exit the first enclosure via the first end and to generate a first recoil in response to detonation of the first charge;

a second projectile disposed within the first enclosure between the first charge and the second charge and operable to exit the first enclosure via the first end and to generate a second recoil in response to detonation of the second charge;

a mechanism disposed adjacent to the first enclosure and operable to absorb at least a respective portion of each of the first and second recoil;

wherein the first enclosure comprises an exhaust port disposed between the first and second ends and operable to discharge respective gases generated by the detonation of the first and second charges; and

wherein the mechanism comprises,

a second enclosure that surrounds the exhaust port of the first enclosure, includes a closed first end attached to the first enclosure between the first end and the exhaust port of the first enclosure, and includes an open second end,

a piston that is disposed within the second enclosure between the exhaust port and the second end of the first enclosure and has an opening through which the first enclosure extends, and

a piston-return spring that is disposed within the second enclosure between the piston and the second end of the second enclosure.

2. The projectile accelerator of claim 1 wherein:

the closed first end of the second enclosure substantially seals with the first enclosure; and

the piston substantially seals with an outer surface of the first enclosure and with an inner surface of the second enclosure.

3. The projectile accelerator of claim 1 wherein the piston-return spring is operable to urge the piston toward the closed first end of the second enclosure.

4. The projectile accelerator of claim 1 wherein the first and second recoils are absorbed to an extent that are related to a stiffness of the piston-return spring.

5. The projectile accelerator of claim 1 , further comprising a piston stop attached to an inner surface of the second enclosure and configured to restrict displacement of the piston in an axial direction.

6. A projectile accelerator, comprising:

a first enclosure having an open first end and a closed second end;

first and second charges disposed within the first enclosure;

a first projectile disposed within the first enclosure between the first charge and the first end and operable to exit the first enclosure via the first end and to generate a first recoil in response to detonation of the first charge;

a second projectile disposed within the first enclosure between the first charge and the second charge and operable to exit the first enclosure via the first end and to generate a second recoil in response to detonation of the second charge;

a mechanism disposed adjacent to the first enclosure and operable to absorb at least a respective portion of each of the first and second recoil;

wherein the first enclosure comprises an exhaust port disposed between the first and second ends and operable to discharge respective gases generated by the detonation of the first and second charges; and

wherein the mechanism comprises,

a second enclosure that surrounds the exhaust port of the first enclosure, includes a closed first end attached to the first enclosure between the first end and the exhaust port of the first enclosure, and includes an open second end, and

a piston that is disposed within the second enclosure between the exhaust port and the second end of the first enclosure and has an opening through which the first enclosure extends.

7. A projectile accelerator, comprising:

a first enclosure having an open first end and a closed second end;

first and second charges disposed within the first enclosure;

a first projectile disposed within the first enclosure between the first charge and the first end and operable to exit the first enclosure via the first end and to generate a first recoil in response to detonation of the first charge;

a second projectile disposed within the first enclosure between the first charge and the second charge and operable to exit the first enclosure via the first end and to generate a second recoil in response to detonation of the second charge;

a mechanism disposed adjacent to the first enclosure and operable to absorb at least a respective portion of each of the first and second recoil;

wherein the mechanism comprises:

a second enclosure that is disposed around the first enclosure and includes open first and second ends;

a piston that is disposed within the second enclosure and around the first enclosure, and that is attached to the first enclosure; and

a piston-return spring that is disposed within the second enclosure between the piston and the second end of the second enclosure.

8. The projectile accelerator of claim 7 wherein the piston is integrally formed with the first enclosure.

9. The projectile accelerator of claim 7 wherein:

the second enclosure comprises an inner surface; and

the piston substantially seals with the inner surface of the second enclosure.

10. The projectile accelerator of claim 7 wherein the piston-return spring is operable to bias against the piston to displace the first enclosure relative to the second enclosure.

11. The projectile accelerator of claim 7 wherein the first and second recoils are absorbed to an extent that are related to a stiffness of the piston-return spring.

12. The projectile accelerator of claim 7 wherein the piston-return spring is operable to bias the piston toward the open first end of the second enclosure.

13. The projectile accelerator of claim 7 , further comprising a piston stop attached to an outer surface of the first enclosure and configured to restrict displacement of the piston in an axial direction.

14. A projectile accelerator, comprising:

a first enclosure having an open first end, a closed second end, and an exhaust-gas-discharge port disposed between the first and second ends;

first and second charges disposed within the first enclosure;

a first projectile disposed within the first enclosure between the first charge and the first end and operable to exit the first enclosure via the first end and to generate a first recoil in response to detonation of the first charge;

a second projectile disposed within the first enclosure between the first charge and the second charge and operable to exit the first enclosure via the first end and to generate a second recoil in response to detonation of the second charge; and

a second enclosure that surrounds the exhaust port of the first enclosure, includes a closed first end attached to the first enclosure between the first end and the exhaust port of the first enclosure, and includes an open second end.

15. A projectile accelerator, comprising:

a first enclosure having an open first end, a closed second end, and an exhaust-gas-discharge port disposed between the first and second ends;

first and second charges disposed within the first enclosure;

a first projectile disposed within the first enclosure between the first charge and the first end and operable to exit the first enclosure via the first end and to generate a first recoil in response to detonation of the first charge;

a second projectile disposed within the first enclosure between the first charge and the second charge and operable to exit the first enclosure via the first end and to generate a second recoil in response to detonation of the second charge;

a second enclosure that surrounds the exhaust port of the first enclosure, includes a closed first end attached to the first enclosure between the first end and the exhaust port of the first enclosure, and includes an open second end; and

wherein the first enclosure extends through the first end of the second enclosure.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 11, 2008
From: RAPP, JOHN W.; HOWARD, ROBERT J.
To: LOCKHEED MARTIN CORPORATION
Reel/Frame 020390/0803 →
Continuity (2)
Continuation In Part 11264299 · Oct 31, 2005
Related Publication 20100282057A1 · Nov 11, 2010