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US4370181A
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Pyrotechnic non-azide gas generants based on a non-hydrogen containing tetrazole compound
Assignee: Autoliv ASP Inc
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Filing: 1980-12-31
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Granted: 1983-01-25
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Expires: 2000-12-31
Abstract
Abstract A solid non-azide composition for generating non-toxic nitrogen gas intended for use in the deployment of inflatable safety crash bags for driver and passenger protection in vehicles consists essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer, examples of the tetrazole being di-alkali metal or mono-alkaline earth metal salts of 5,5'-bitetrazole, and examples of the oxidizer being sulfur, molybdenum disulfide, chromium trichloride and iron trifluoride.
Inventors
- 👤 Norman H. Lundstrom
- 👤 Graham C. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:57
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/02; C06; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
37 words
A solid pellet for generating non-toxic nitrogen gas consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixture thereof.
Claim 2
Dependent Claim
37 words
A solid pellet for generating non-toxic nitrogen gas consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixture thereof.
Claim 3
Dependent Claim
11 words
The pellet of claim 1 wherein said tetrazole comprises a bitetrazole.
Claim 4
Dependent Claim
15 words
The pellet of claim 1 wherein said tetrazole comprises metal salt of a tetrazole compound.
Claim 5
Dependent Claim
12 words
The pellet of claim 3 wherein said tetrazole compound comprises a bitetrazole.
Claim 6
Dependent Claim
30 words
The pellet of claim 3 wherein said metal salt of a tetrazole is selected from the group consisting of alkali metal salts, alkaline earth metal salts, manganese, and admixtures thereof.
Claim 7
Dependent Claim
15 words
The pellet of claim 5 wherein said metal salt of a tetrazole is disodium bitetrazole.
Claim 8
Dependent Claim
15 words
The pellet of claim 5 wherein said metal salt of a tetrazole is dipotassium bitetrazole.
Claim 9
Dependent Claim
15 words
The pellet of claim 5 wherein said metal salt of a tetrazole is calcium bitetrazole.
Claim 10
Dependent Claim
10 words
The pellet of claim 1 wherein said oxidizer is sulfur.
Claim 11
Dependent Claim
11 words
The pellet of claim 1 wherein said oxidizer is chromium trichloride.
Claim 12
Dependent Claim
11 words
The pellet of claim 1 wherein said oxidizer is molybdenum disulfide.
Claim 13
Dependent Claim
11 words
The pellet of claim 1 wherein said oxidizer is iron trifluoride.
Claim 14
Dependent Claim
36 words
The pellet of claim 1 wherein said tetrazole compound is present in an amount from about 60 to about 90 weight percent and said oxidizer in an amount from about 10 to about 40 weight percent.
Claim 15
Dependent Claim
98 words
In a method for inflating an air bag comprising igniting a pellet of pyrotechnic material to generate a gas, filtering and cooling the generated gas, and rising the filtered and cooled gas to inflate the air bag, the improvement comprising the step of using a solid pellet for generating non-toxic nitrogen gas consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixtures thereof, whereby the air bag when inflated contains a concentration of less than 30 ppm of hydrogen sulfide.
Claim 16
Dependent Claim
98 words
In a method for inflating an air bag comprising igniting a pellet of pyrotechnic material to generate a gas, filtering and cooling the generated gas, and rising the filtered and cooled gas to inflate the air bag, the improvement comprising the step of using a solid pellet for generating non-toxic nitrogen gas consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixtures thereof, whereby the air bag when inflated contains a concentration of less than 30 ppm of hydrogen sulfide.
Claim 17
Independent Claim
63 words
A method for the generation of a non-toxic nitrogen gas which comprises: (a) compounding a gas generant composition consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixtures thereof; (b) pelletizing said composition; and (c) igniting said pelletized composition to produce a non-toxic nitrogen gas.
Claim 18
Independent Claim
63 words
A method for the generation of a non-toxic nitrogen gas which comprises: (a) compounding a gas generant composition consisting essentially of a non-hydrogen containing tetrazole compound and a non-oxygen containing oxidizer selected from the group consisting of sulfur, chromium trichloride, molybdenum disulfide, iron trifluoride, and admixtures thereof; (b) pelletizing said composition; and (c) igniting said pelletized composition to produce a non-toxic nitrogen gas.
Claim 19
Dependent Claim
17 words
The method of claim 15, whereby said non-toxic nitrogen gas contains less than 30 ppm hydrogen sulfide.
Claim 20
Dependent Claim
19 words
The method of claim 15, whereby said non-toxic nitrogen gas contains carbon monoxide and hydrogen cyanide in non-toxic amounts.
Claim 21
Dependent Claim
34 words
The method of claim 15, whereby said tetrazole compound is present in an amount from about 60 to about 90 weight percent and said oxidizer in an amount from 10 to 40 weight percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |