Pyrotechnic relief valve

• US 7,373,944 B2
• Filed: 12/27/2004
• Issued: 05/20/2008
• Est. Priority Date: 12/27/2004
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Smith, Bradley W., Cox, Matthew A.
• Primary Examiner(s): Krishnamurthy; Ramesh
• Application Number:
  US11/023,155
• Publication Number:
  US 20060137742A1
• Time in Patent Office: 1,240 Days
• Field of Search: 137/68.13, 137/68.29, 137/68.3, 220/89.3, 220/277
• US Class Current: 137/68.13
• CPC Class Codes: F16K 17/38 of excessive temperature
• CPC Class Codes: F16K 17/403 with a fracturing valve member
• CPC Class Codes: Y10T 137/1647 Explosive actuation
• CPC Class Codes: Y10T 137/1767 Movable knife or cutter

Abstract

A relief valve and related systems and methods are disclosed for use in fluid distribution lines. The relief valve comprises a body defining a cavity and comprising at least first and second openings in fluid communication with the cavity. A connector piece is connected to the body at the first opening to connect the valve to a fluid distribution line. A rupture disc is disposed within and obstructs the first opening. When it is desired that fluid from the fluid distribution line be vented from the system, the rupture disc is punctured and thereby allows for fluid communication through the first opening of the valve.

Claims

1. A relief valve comprising:

a body defining a cavity and comprising at least first and second openings in fluid communication with the cavity;

a connector piece connected to the body at the first opening, wherein the connector piece is configured to facilitate a sealing connection with a fluid distribution line;

a rupture disc disposed within and obstructing the first opening; and

a cutter piece comprising a cutting member pivotably connected with the cutter piece and positioned adjacent to the rupture disc, wherein the cutter piece is configured to facilitate puncturing of the rupture disc;

further comprising a pyrotechnic initiator operatively coupled to the cutter piece.

2. The relief valve of claim 1, wherein the connector piece is a nut.

3. The relief valve of claim 1, wherein the connector piece is a crimp sleeve.

4. The relief valve of claim 3, wherein the crimp sleeve is integrally molded with the body.

5. The relief valve of claim 1, further comprising an electrical connector connected to the pyrotechnic initiator.

6. The relief valve of claim 1, wherein the pyrotechnic initiator is integrally molded with the body.

7. The relief valve of claim 1, wherein the rupture disc is positioned and aligned with the pyrotechnic initiator such that, upon deployment of the pyrotechnic initiator, the pyrotechnic initiator causes the cutting member to engage and rupture the rupture disc and thereby allow for fluid communication through the first opening.

8. The relief valve of claim 7, wherein the cutting member has a pointed tip.

9. The relief valve of claim 1, wherein the cutter piece is configured to puncture the rupture disc upon deployment of the pyrotechnic initiator.

10. The relief valve of claim 1, further comprising a hose nipple connected to the body at the second opening.

11. The relief valve of claim 10, wherein the hose nipple is integrally molded with the body.

12. The relief valve of claim 1, wherein the rupture disc is mounted within the connector piece.

13. The relief valve of claim 1, wherein a sealing washer is positioned between the connector piece and the rupture disc.

14. The relief valve of claim 1, further comprising a tee fitting connected to the body and in fluid communication with the cavity of the body at the first opening, wherein the tee fitting is connected to the body with the connector piece, and wherein the tee fitting is designed to be integrated with an automotive refrigerant line.

15. The relief valve of claim 1, wherein the first opening is oriented approximately perpendicular to the second opening.

16. The relief valve of claim 1, wherein the first opening is axially aligned with or approximately parallel to the second opening.

17. The relief valve of claim 1, wherein the body is formed from a plastic material.

18. The relief valve of claim 1, further comprising a support structure integrally molded with the body.

19. A relief valve comprising:

a body defining a cavity and comprising at least first and second openings in fluid communication with the cavity;

connecting means for facilitating a sealing connection with a fluid distribution line, wherein the connecting means is connected with the body at the first opening;

valve means for selectively controlling fluid communication therethrough, wherein the valve means is disposed within and obstructs the first opening; and

means for puncturing the valve means by pivoting into the valve means to puncture the valve means and thereby establishing fluid communication through the first opening, wherein the means for puncturing is positioned adjacent to the valve means wherein said means for puncturing the valve means is coupled to a pyrotechnic initiator.

20. A relief valve comprising:

a body defining a cavity and comprising at least first and second openings in fluid communication with the cavity;

a support structure at least partially embedded within the body, wherein the support structure has an aperture formed in a sidewall of the support structure;

a pyrotechnic initiator integrally molded with the body;

a hose nipple integrally molded with the body at the second opening, wherein the body is in fluid communication with the hose nipple through the aperture in the support structure; and

a rupture disc disposed within and obstructing the first opening, wherein the rupture disc is positioned and aligned with the pyrotechnic initiator such that, upon deployment of the pyrotechnic initiator, the pyrotechnic initiator ruptures the rupture disc and thereby allows for fluid communication through the first opening.

21. The relief valve of claim 20, wherein the support structure is integrally formed with a crimp sleeve.

22. The relief valve of claim 20, wherein the support structure has a plurality of apertures formed in a sidewall of the support structure.