US3785674A
Expired / Lapsed
US
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Crash restraint nitrogen generating inflation system
Assignee: Rocket Research Co
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Filing: 1971-06-14
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Granted: 1974-01-15
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Expires: 1991-06-14
Abstract
Abstract A crash restraint system for an automobile comprising an inflatable bag mounted forward of the automobile passenger seat. A bag inflating device comprising a cluster of gas generating units, each of which has a primary combustion chamber to produce the driving gas mixture, a secondary reaction chamber to react with some of the products of the gas mixture to remove them from the gas mixture, and a gas generating coolant chamber which generates additional gas by vaporization and produces a cooler gas mixture to inflate the bag. In the combustion chamber is a composition made up of an azide (e.g. sodium azide) and an oxidizer (e.g. potassium perchlorate), which upon ignition produces free nitrogen and other combustion products, such as sodium oxide, free sodium and potassium chloride. In the secondary reaction chamber is a porous composition (e.g. copper oxide and carbon) that reacts with the free sodium and sodium oxide and permits the free nitrogen to pass through to the coolant chamber. The coolant chamber contains a liquid halocarbon (e.g. Freon) which atomizes and vaporizes with the nitrogen to form an inflating gas for the bag.
Inventors
- 👤 D Poole
- 👤 P Stang
- 👤 J Mars
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:27
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
14 words
The system as recited in claim 1, comprising carbon in said secondary reaction chamber.
Claim 2
Dependent Claim
22 words
a second structure defining a secondary reaction zone downstream of said primary reaction zone and arranged to receive a gaseous discharge therefrom;
Claim 3
Dependent Claim
26 words
a third structure defining a coolant zone located downstream of said first and second structures and arranged to receive gaseous discharge from said secondary reaction zone;
Claim 4
Dependent Claim
37 words
The system as recited in claim 1, wherein at least a portion of said secondary reaction composition is selected from a group consisting of silicon oxide, aluminium oxide, boric oxide, boric acid, cupric oxide and mixtures thereof.
Claim 5
Dependent Claim
15 words
The system as recited in claim 1, wherein said secondary reaction composition comprises silicon oxide.
Claim 6
Dependent Claim
18 words
said third structure having an outlet leading into said inflatable to direct gaseous discharge therefrom into said inflatable;
Claim 7
Dependent Claim
57 words
a primary gas producing composition located in said primary reaction zone, which composition reacts to form free nitrogen and at least one other combustion product, said composition comprising an azide and an oxidizer to react with said azide, said azide being selected from a group consisting of alkali metal azides, alakline earth metal azides, and mixtures thereof;
Claim 8
Dependent Claim
15 words
The system as recited in claim 1, wherein said secondary reaction composition comprises cupric oxide.
Claim 9
Dependent Claim
15 words
The system as recited in claim 1, wherein said secondary reaction composition comprises aluminum oxide.
Claim 10
Dependent Claim
44 words
a secondary composition located in said secondary reaction zone and arranged to permit passage therethrough of nitrogen and to remove at least a substantial portion of said other combustion product, said secondary composition being at least partly made up of an acidic oxide, and
Claim 11
Dependent Claim
16 words
a coolant material in said coolant zone to cool gaseous discharge from said secondary reaction zone.
Claim 12
Dependent Claim
15 words
The system as recited in claim 1, wherein said secondary reaction composition comprises boric oxide.
Claim 13
Dependent Claim
15 words
The system as recited in claim 1, wherein said secondary reaction composition comprises boric acid.
Claim 14
Dependent Claim
31 words
The system as recited in claim 1, wherein said oxidizer is selected from a group consisting of metal perchlorates, metal chlorates, metal peroxides, metal superoxides, chlorocarbons, metal chlorides, and mixtures thereof.
Claim 15
Dependent Claim
31 words
The system as recited in claim 9, wherein said azide is contained in the primary reaction composition in a percentage greater than the stoichiometric proportion of the azide to the oxidizer.
Claim 16
Dependent Claim
14 words
The system as recited in claim 10, comprising charcoal in said secondary reaction chamber.
Claim 17
Dependent Claim
14 words
The system as recited in claim 10, wherein said azide is essentially sodium azide.
Claim 18
Dependent Claim
15 words
The system as recited in claim 12, wherein said oxidizer is essentially a metal perchlorate.
Claim 19
Dependent Claim
14 words
The system as recited in claim 13, wherein said oxidizer is essentially potassium perchlorate.
Claim 20
Dependent Claim
233 words
In an occupant carrying vehicle having an occupant carrying location and structure spaced from said location, a crash restraint inflating system adapted to inflate a collapsed inflatable and so disposed and mounted in said vehicle that upon being inflated the inflatable is positioned between said structure and said occupant carrying location to protect an occupant in said location from impact with said structure, said system comprising: a. a first structure defining a primary combustion zone and arranged to discharge gaseous products along a predetermined downstream path; b. a second structure defining a secondary reaction zone downstream of said primary reaction zone and arranged to receive a gaseous discharge therefrom and provide a gaseous discharge from said second structure to inflate the inflatable; c. a primary gas producing composition located in said primary reaction chamber and comprising a nitrogen containing ingredient which is an azide selected from a group consisting of alkali metal azides, alkaline earth metal azides and mixtures thereof, and a second ingredient which is an oxidizer that reacts with the nitrogen containing ingredient to form free nitrogen and at least one other combustion product; and d. a secondary composition located in said secondary reaction chamber and arranged to permit passage therethrough of the free nitrogen and to remove at least a substantial portion of said outer combustion product, said secondary composition being at least partly made up of an acidic oxide.
Claim 21
Dependent Claim
14 words
The system as recited in claim 15, comprising carbon in said secondary reaction chamber.
Claim 22
Dependent Claim
37 words
The system as recited in claim 15, wherein at least a portion of said secondary reaction composition is selected from a group conisting of silicon oxide, aluminum oxide, boric oxide, boric acid, cupric oxide and mixtures thereof.
Claim 23
Dependent Claim
15 words
The system as recited in claim 15, wherein said secondary reaction composition comprises silicon oxide.
Claim 24
Dependent Claim
15 words
The system as recited in claim 15, wherein said secondary reaction composition comprises cupric oxide.
Claim 25
Dependent Claim
15 words
The system as recited in claim 15, wherein said secondary reaction composition comprises aluminum oxide.
Claim 26
Dependent Claim
15 words
The system as recited in claim 15, wherein said secondary reaction composition comprises boric oxide.
Claim 27
Dependent Claim
15 words
The system as recited in claim 15, wherein said secondary reaction composition comprises boric acid.
Claim 28
Dependent Claim
31 words
The system As recited in claim 15, wherein said oxidizer is selected from a group consisting of metal perchlorates, metal chlorates, metal peroxides, metal superoxides, chlorocarbons, metal chlorides, and mixtures thereof.
Claim 29
Dependent Claim
31 words
The system as recited in claim 23, wherein said azide is contained in the primary reaction composition in a percentage greater than the stoichiometric proportion of the azide to the oxidizer.
Claim 30
Dependent Claim
14 words
The system as recited in claim 24, comprising charcoal in said secondary reaction chamber.
Claim 31
Dependent Claim
14 words
The system as recited in claim 24, wherein said azide is essentially sodium azide.
Claim 32
Dependent Claim
15 words
The system as recited in claim 26, wherein said oxidizer is essentially a metal perchlorate.
Claim 33
Dependent Claim
14 words
The system as recited in claim 27, wherein said oxidizer is essentially potassium perchlorate.
Claim 34
Dependent Claim
173 words
In an occupant carrying vehicle having an occupant carrying location and structure spaced from said location, a method of inflating a crash restraint inflatable for protecting an occupant in said location from impact with sais structure, said method comprising: a. producing a primary reaction gas by reacting in a primary reaction chamber a primary gas producing composition comprising a nitrogen producing ingredient which is an azide selected from a group consisting of alkali metal azides, alkaline earth metal azides and mixtures thereof, and a second ingredient to react therewith, which second ingredient is an oxidizer, to produce a gas mixture comprising free nitrogen and at least one other combustion product; b. directing said gas mixture through a secondary composition in a secondary reaction chamber, which secondary composition is at least partly made up of an acidic oxide to remove at least a substantial portion of said other combustion product and permit said free nitrogen to pass therethrough so as to emit a gaseous discharge; and c. directing said gaseous discharge into said inflatable.
Claim 35
Dependent Claim
16 words
The method as recited in claim 29, wherein there is carbon in the secondary reaction chamber.
Claim 36
Dependent Claim
37 words
The system as recited in claim 29, wherein at least a portion of said secondary reaction composition is selected from a group consisting of silicon oxide, aluminum oxide, boric oxide, boric acid, cupric oxide and mixtures thereof.
Claim 37
Dependent Claim
15 words
The system as recited in claim 29, wherein said secondary reaction composition comprises silicon oxide.
Claim 38
Dependent Claim
15 words
The system as recited in claim 29, wherein said secondary reaction composition comprises cupric oxide.
Claim 39
Dependent Claim
15 words
The system as recited in claim 29, wherein said secondary reaction composition comprises aluminum oxide.
Claim 40
Dependent Claim
15 words
The system as recited in claim 29, wherein said secondary reaction composition comprises boric oxide.
Claim 41
Dependent Claim
15 words
The system as recited in claim 29, wherein said secondary reaction composition comprises boric acid.
Claim 42
Dependent Claim
31 words
The system as recited in claim 29, wherein said oxidizer is selected from a group consisting of metal perchlorates, metal chlorates, metal peroxides, metal superoxides, chlorocarbons, metal chlorides, and mixtures thereof.
Claim 43
Dependent Claim
31 words
The system as recited in claim 37, wherein said azide is contained in the primary reaction composition in a percentage greater than the stoichiometric proportion of the azide to the oxidizer.
Claim 44
Dependent Claim
14 words
The system as recited in claim 38, comprising charcoal in said secondary reaction chamber.
Claim 45
Dependent Claim
14 words
The system as recited in claim 38, wherein said azide is essentially sodium azide.
Claim 46
Dependent Claim
15 words
The system as recited in claim 40, wherein said oxidizer is essentially a metal perchlorate.
Claim 47
Dependent Claim
14 words
The system as recited in claim 41, wherein said oxidizer is essentially potassium perchlorate.
References Cited (Backward Citations)
US2779281A
Cited
US2940830A
Cited
US2981616A
Cited
US3109375A
Cited
US3122462A
Cited
US3320882A
Cited
US3450414A
Cited
US3515518A
Cited
US3532358A
Cited
US3692495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |