Pressurized gas release mechanism

• US 7,597,354 B2
• Filed: 10/27/2005
• Issued: 10/06/2009
• Est. Priority Date: 10/28/2004
• Status: Expired due to Fees

• Current Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Blackburn, Jeffery S.
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US11/260,824
• Publication Number:
  US 20060214404A1
• Time in Patent Office: 1,440 Days
• Field of Search: 280/737, 280/736, 280/741, 280/734, 280/735, 102/530, 102/531, 222/3, 222/5, 222/54, 137/67, 137/72, 137/76, 137/68.11, 137/68.12, 137/68.13, 137/68.19
• US Class Current: 280/737
• CPC Class Codes: B60R 21/268 using instantaneous release of stored pressurised gas B60R21/26005 takes precedence
• CPC Class Codes: B60R 21/274 characterised by means to rupture or open the fluid source

Abstract

A mechanism (10) for releasably confining pressurized fluid in a container (18) is provided. The mechanism includes a rupturable membrane (22) in fluid communication with an interior of the container (18), thereby exposing the membrane (22) to the fluid. The membrane (22) is configured to obstruct flow of the pressurized fluid when externally supported against pressure exerted by the fluid. The membrane (22) is also rupturable by pressure exerted by the fluid when not externally supported against the pressure exerted by the fluid. A support member (28) is provided for externally supporting the membrane (22) against pressure exerted by the fluid. The support member (28) is configured to be fracturable upon exposure to combustion products formed by activation of a gas generator (66) at least partially encased within the support member (28).

Claims

1. A mechanism for releasably confining pressurized fluid in a container comprising:

a rupturable membrane for sealing an opening of the container, the rupturable membrane being positioned to obstruct flow of the pressurized fluid when externally supported against pressure exerted by the fluid, the rupturable membrane being rupturable by pressure exerted by the fluid when not externally supported against pressure exerted by the fluid,

a support member for externally supporting the rupturable membrane against pressure exerted by the fluid, the support member being fracturable and/or decomposable upon exposure to combustion products formed by activation of a gas generator at least partially encased within said support member,

wherein operation of the gas generator results in fracturing and/or decomposing of the support member to remove support for the rupturable membrane and enable rupturing of the membrane to release the pressurized fluid therethrough.

2. The mechanism of claim 1 further comprising:

a housing secured to the container and defining a passage for receiving the pressurized fluid therethrough, wherein the rupturable membrane is configured to obstruct flow of the pressurized fluid through the housing passage when externally supported against pressure exerted by the fluid.

3. The mechanism of claim 2 wherein the support member is formed within the housing.

4. The mechanism of claim 2 wherein the support member is positioned within the passage.

5. The mechanism of claim 1 wherein the support member abuts the rupturable membrane.

6. The mechanism of claim 1 wherein the support member is formed from an epoxy.

7. The mechanism of claim 6 wherein the support member is formed from an epoxy comprising a bisphenol A diglycidyl ether resin at about 60 percent by weight.

8. The mechanism of claim 7 wherein the support member further comprises a mercaptan amine blend ranging from 90-100 percent by weight.

9. The mechanism of claim 6 wherein the support member is formed from an epoxy comprising aminoethylpiperazine at about 10-30 percent by weight, nonylphenol at about 10-20 percent by weight, polyamide of C18 fatty acid dimmers and 1,4,8,11-tetraazacyclotetradecane-N,N′

,N″

,N′

″

-tetraacetic acid (TETA) at about 1-5 percent by weight, and 2,4,6-Tris(Dimethylaminomethyl)phenol at about 5-10 percent by weight.

10. The mechanism of claim 9 wherein the support member further comprises bisphenol A diglycidyl ether resin at about 30-60 percent by weight, an acrylate at about 1-5 percent by weight, and butylated bisphenol A epoxy resin at about 30-60 percent by weight.

11. The mechanism of claim 6 wherein the epoxy comprises a two-part epoxy.

12. The mechanism of claim 1 wherein the support member is formed from a polymer compound.

13. The mechanism of claim 1 wherein the membrane is secured to the container.