Patent US4929290A successfully refreshed from Google Patents.
US4929290A
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Crash bag propellant composition and method for generating nitrogen gas
Assignee: Hercules LLC
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Filing: 1989-11-17
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Granted: 1990-05-29
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Expires: 2009-11-17
Abstract
Abstract A propellant composition and method for limiting the corrosive properties of by-products from initiated crash bag propellant compositions comprising a 1(a) or 2(a) group metal azide salt, an oxidizer in the form of an oxide of a non-toxic transition metal element, and an effective amount of a modifier component of the formula Me.sub.x (An).sub.o wherein Me is a metal cation selected from iron, copper, cobalt, nickel, and molybdenum; An is an anion group which is chemically compatible with and capable of reacting with the metal of the azide salt to form nitrogen gas and non-toxic by-products less corrosive than the corresponding hydroxide of the azide metal would be; and x and o are individually defined as a positive number not exceeding about 4, the sum of which does not exceed about 5.
Inventors
- 👤 Richard V. Cartwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:28
CPC Classifications
C; C06; C06B; C06B35/00; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
A propellant composition comprising, in combination, (a) a metal azide salt component of a group 1(a)- or 2(a)-type metal; and (b) an oxide of a non-toxic transition metal element sufficient to react with up to about 70% of said metal azide salt component; and (c) an effective amount of a modifier component represented by the formula Me.sub.x (An).sub.o wherein Me is defined as a cation of a non-toxic transition metal element; An is defined as a member selected from the group consisting of a carbon-containing, a silicon-containing, and a boron-containing anion group chemically compatible with Me and capable of reacting with said metal azide salt component to obtain non-toxic by-products less basic than a metal hydroxide corresponding to said metal azide salt component; and x and o are individually defined as positive numbers appropriate to indicate the corresponding chemical formula.
Claim 2
Dependent Claim
140 words
A propellant composition comprising, in combination, (a) a metal azide salt component of a group 1(a)- or 2(a)-type metal; and (b) an oxide of a non-toxic transition metal element sufficient to react with up to about 70% of said metal azide salt component; and (c) an effective amount of a modifier component represented by the formula Me.sub.x (An).sub.o wherein Me is defined as a cation of a non-toxic transition metal element; An is defined as a member selected from the group consisting of a carbon-containing, a silicon-containing, and a boron-containing anion group chemically compatible with Me and capable of reacting with said metal azide salt component to obtain non-toxic by-products less basic than a metal hydroxide corresponding to said metal azide salt component; and x and o are individually defined as positive numbers appropriate to indicate the corresponding chemical formula.
Claim 3
Dependent Claim
40 words
A propellant composition of claim 1 wherein the metal azide is a salt of an alkali or alkaline earth metal; and Me is defined as a metal cation selected from the group consisting of iron, copper, cobalt, nickel, and molybdenum.
Claim 4
Dependent Claim
42 words
A propellant composition of claim 1, in which Me is defined as copper; An is defined as a --[(OH) 2 CO 3 ] -4 group; x is a positive number of about 2; and o is a positive number of about 1.
Claim 5
Dependent Claim
40 words
A propellant composition of claim 1, in which Me is defined as iron; An is defined as a --(CO 3 ) -2 group; x is a positive number of about 1; and o is a positive number of about 1.
Claim 6
Dependent Claim
16 words
A propellant composition of claim 2 wherein the metal azide is sodium azide or potassium azide.
Claim 7
Dependent Claim
16 words
A propellant composition of claim 1, comprising at least one of a binder and a lubricant.
Claim 8
Dependent Claim
16 words
A propellant composition of claim 2, comprising at least one of a binder and a lubricant.
Claim 9
Dependent Claim
16 words
A propellant composition of claim 3, comprising at least one of a binder and a lubricant.
Claim 10
Dependent Claim
16 words
A propellant composition of claim 4, comprising at least one of a binder and a lubricant.
Claim 11
Dependent Claim
119 words
A safety crash bag device comprising, in combination, an inflatable bag of desired shape receivably connected to a gas-generating means charged with an active amount of gas-generating propellant composition as defined in claim 1 in proximity to means for ignition arranged in potential firing attitude with respect to said gas-generating propellant; and impact detecting means functionally connected to said detonating means for firing of said detonating means upon exposure to an impact of predetermined severity; wherein an impacting force on said impact detecting means effects a firing sequence through said means for ignition of said gas-generating propellant, essentially producing inert nitrogen gas in said gas-generating means, and passing said gas to said inflatable bag to create a shock-absorbing barrier.
Claim 12
Dependent Claim
21 words
A propellant composition of claim 1, in which An is defined as an anion selected from the group consisting of ##STR2##
Claim 13
Dependent Claim
17 words
A propellant composition of claim 2, in which An is defined as --[(OH).sub.2 CO.sub.3 ].sup.-4, or --(CO.sub.3).sup.-2.
Claim 14
Independent Claim
150 words
A method for reducing corrosive properties of by-products generated by initiating the reaction of a crash bag propellant composition comprising a group 1(a)- or 2(a)-type metal azide component and an oxide of a transition metal as an oxidizer component, comprising replacing said oxidizer component, at least in part, with an effective amount of a modifier component of the formula Me.sub.x An.sub.o wherein Me is defined as a cation of a non-toxic transition metal element; An is defined as a member selected from the group consisting of a carbon-containing, a silicon-containing, and a boron-containing anion group chemically compatible with said transition metal cation of said modifier component, and capable of reacting with said metal azide salt component to obtain non-toxic by-products less basic than a metal hydroxide corresponding to said metal azide salt component; and x and o are individually defined as positive numbers appropriate to indicate a corresponding chemical formula.
Claim 15
Independent Claim
150 words
A method for reducing corrosive properties of by-products generated by initiating the reaction of a crash bag propellant composition comprising a group 1(a)- or 2(a)-type metal azide component and an oxide of a transition metal as an oxidizer component, comprising replacing said oxidizer component, at least in part, with an effective amount of a modifier component of the formula Me.sub.x An.sub.o wherein Me is defined as a cation of a non-toxic transition metal element; An is defined as a member selected from the group consisting of a carbon-containing, a silicon-containing, and a boron-containing anion group chemically compatible with said transition metal cation of said modifier component, and capable of reacting with said metal azide salt component to obtain non-toxic by-products less basic than a metal hydroxide corresponding to said metal azide salt component; and x and o are individually defined as positive numbers appropriate to indicate a corresponding chemical formula.
Claim 16
Dependent Claim
30 words
A method of claim 13 in which the metal azide is sodium azide or potassium azide and An is defined as a member selected from the group consisting of ##STR3##
Claim 17
Dependent Claim
41 words
A method of claim 13, in which Me is defined as copper; An is defined as a --[(OH) 2 CO 3 ] -4 group; x is a positive number of about 2; and o is a positive number of about 1.
Claim 18
Dependent Claim
39 words
A method of claim 13, in which Me is defined as iron; An is defined as a --(CO 3 ) -2 group; x is a positive number of about 1; and o is a positive number of about 1.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |