Gas Generating system

• US 20080150266A1
• Filed: 01/31/2008
• Published: 06/26/2008
• Est. Priority Date: 06/02/2005
• Status: Active Grant

• Current Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: McCormick, David M., Anderson, Jeffrey, Morgan, Richard W., Gmitter, Emily
• Granted Patent: US 8,496,266 B2
• Time in Patent Office: Days
• US Class Current: 280/741
• CPC Class Codes: B60R 2021/26082 Material
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

A gas generating system usable in an inflatable vehicle occupant protection system is provided. The system includes an outer housing having an outer diameter varying within a range of approximately 16 millimeters to approximately 20 millimeters. A vehicle occupant protection system and an airbag module including the gas generating system are also provided.

Claims

1. A gas generating system comprising an outer housing having an outer diameter varying within a range of approximately 16 millimeters to approximately 20 millimeters.

2. The gas generating system of claim 1 further comprising an end closure coupled to an end of the housing to form a gas-tight, metal-to-metal seal between the housing and the end closure.

3. The gas generating system of claim 1 further comprising an end closure welded to an end of the housing to form a gas-tight seal between the housing and the end closure.

4. The gas generating system of claim 1 further comprising a gas generant composition including a mixture of:

a high-nitrogen fuel selected from the class consisting of 1-, 3-, and 5-substituted nonmetal salts of triazoles, and, 1- and 5-substituted nonmetal salts of tetrazoles;

a first oxidizer selected from the group consisting of phase stabilized ammonium nitrate;

a metallic second oxidizer; and

an inert component.

5. The gas generating system of claim 1 further comprising a gas generant composition including a mixture of:

a high-nitrogen fuel selected from the class consisting of 1-, 3-, 5-substituted amine salts of triazoles and 1- and 5-substituted amine salts of tetrazoles, said fuel employed in a concentration of 13 to 38% by weight of the gas generant composition;

a first oxidizer consisting of phase stabilized ammonium nitrate, said first oxidizer employed in a concentration of 46 to 87% by weight of the gas generant composition;

a metallic second oxidizer employed in a concentration of 0.1 to 25% by weight of the gas generant composition; and

an inert component employed in a concentration of 0.1 to 8% by weight of the gas generant composition, wherein said fuel is selected from the group consisting of monoguanidinium salt of 5,5′

-Bi-1H-tetrazole, diguanidinium salt of 5,5′

-Bi-1H-tetrazole, monoaminoguanidinium salt of 5,5′

-Bi-1H-tetrazole, diaminoguanidinium salt of 5,5′

-Bi-1H-tetrazole monohydrazinium salt of 5,5′

-Bi-1H-tetrazole, dihydrazinium salt of 5,5′

-Bi-1H-tetrazole, monoammonium salt of 5,5′

-Bi-1H-tetrazole, diammonium salt of 5,5′

-Bi-1H-tetrazole, mono-3-amino-1,2,4-triazolium salt of 5,5′

-Bi-1H-tetrazole, di-3-amino-1,2,4-triazolium salt of 5,5′

-Bi-1H-tetrazole, diguanidinium salt of 5,5′

-Azobis-1H-tetrazole, and monoammonium salt of 5-Nitramino-1H-tetrazole.

6. The gas generating system of claim 1 further comprising a gas generant composition including a mixture of a high-nitrogen nonazide fuel selected from the class consisting of 1-, 3-, and 5-substituted amine salts of triazoles, and, 1- and 5-substituted amine salts of tetrazoles;

and dry-mixed with an oxidizer selected from the group consisting of phase stabilized ammonium nitrate.

7. The gas generating system of claim 1 further comprising a gas generant composition including a mixture of:

a high-nitrogen nonazide fuel selected from the class consisting of 1-, 3-, 5-substituted amine salts of triazoles and 1- and 5-substituted amine salts of tetrazoles, said fuel employed in a concentration of 15 to 65% by weight of the gas generant composition; and

an oxidizer consisting of phase stabilized ammonium nitrate, said oxidizer employed in a concentration of 35 to 85% by weight of the gas generant composition,

wherein said fuel is selected from the group consisting of monoguanidinium salt of 5,5′

-Bis-1H-tetrazole, diguanidinium salt of 5,5′

-Bis-1H-tetrazole, monoaminoguanidinium salt of 5,5′

-Bis-1H-tetrazole, diaminoguanidinium salt of 5,5′

-Bis-1H-tetrazole, monohydrazinium salt of 5,5′

-Bis-1H-tetrazole, dihydrazinium salt of 5,5′

-Bis-1H-tetrazole, monoammonium salt of 5,5′

-bis-1H-tetrazole, diammonium salt of 5,5′

-bis-1H-tetrazole, mono-3-amino-1,2,4-triazolium salt of 5,5′

-bis-1H-tetrazole, di-3-amino-1,2,4-triazolium salt of 5,5′

-bis-1H-tetrazole, diguanidinium salt of 5,5′

-Azobis-1H-tetrazole, and monoammonium salt of 5-Nitramino-1H-tetrazole.

8. A vehicle occupant protection system comprising a gas generating system in accordance with claim 1.

9. An airbag module comprising a gas generating system in accordance with claim 1.

10. The gas generating system of claim 1 wherein an end portion of the housing has an orifice formed therein for attenuating pressure waves resulting from combustion of a gas generant positioned within the outer housing.

11. A gas generating system comprising an outer housing having an outer diameter of approximately 16 millimeters along substantially its entire length.

12. The gas generating system of claim 11 further comprising an end closure coupled to an end of the housing to form a gas-tight seal between the housing and the end closure, wherein the outer diameter of the housing proximate the seal is approximately 20 millimeters.

13. The gas generating system of claim 11 wherein the outer housing has a maximum outer diameter of approximately 20 millimeters.