US 6,854,395 B2Granted

Inflator for an air bag

AssigneeDaicel Chemical Industries, Ltd.

InventorsNobuyuki Katsuda, Mikio Yabuta, Jianzhou Wu

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Abstract

An inflator for an air bag has, in a housing having a gas discharging port, a combustion chamber accommodating a molded article of a gas generating composition which is burnt to generate gas and ignition means to ignite the molded article of a gas generating composition. The molded article contains a metal component and meets the requirement: (A) the (theoretical) combustion flame temperature of the molded article of the gas generating composition is 2000° C. or less, and part or the whole of the metal or metal oxide after combustion of the molded article of the gas generating composition has a melting point not lower than the combustion flame temperature; and (B) bulk combustion residues remain in the combustion chamber at the time of combustion of the molded article of the gas generating composition.

Claims51

Dependent claims

An inflator for an air bag, comprising:

a housing having a gas discharging port;
a combustion chamber provided in said housing and accommodating a molded article of a gas generating composition which is burnt to generate a gas;
and
ignition means provided in said housing for igniting the molded article of a gas generating composition;
wherein the molded article of the gas generating composition comprises a gas generating agent containing (a) a fuel selected from the group consisting of triazine derivatives, triazole derivatives, tetrazole derivatives, guanidine derivatives, azodicarbonamide derivatives, and hydrazine derivatives and (b) a metal-containing oxidizing agent selected from the group consisting of oxy acid salts, metal oxides, metal complex oxides, metal peroxides, and basic metal nitrates and meets the following requirements (A) and (B):
(A) the (theoretical) combustion flame temperature of the molded article of the gas generating composition is 2000° C. or less, and part or the whole of the metal or metal oxide after combustion of the molded article of the gas generating composition has a melting point not lower than the combustion flame temperature;
and
(B) bulk combustion residues remain in the combustion chamber at the time of combustion of the molded article of the gas generating composition.

5 more elements

An inflator for an air bag, comprising:

a housing having a gas discharging port;
a combustion chamber provided in said housing and accommodating a molded article of a gas generating composition which is burnt to generate a gas;
ignition means provided in said housing for igniting the molded article of a gas generating composition;
and
a porous dividing member arranged between the gas discharging port and the molded article of the gas generating composition, wherein the combustion gas is discharged via the dividing member from the gas discharging port, and wherein the molded article of the gas generating composition comprises a gas generating agent containing (a) a fuel selected from the group consisting of triazine derivatives, triazole derivatives, tetrazole derivatives, guanidine derivatives, azodicarbonamide derivatives, and hydrazine derivatives and (b) a metal-containing oxidizing agent selected from the group consisting of oxy acid salts, metal oxides, metal complex oxides, metal peroxides, and basic metal nitrates and meets the following requirements (A) and (B):
(A) the (theoretical) combustion flame temperature of the molded article of the gas generating composition is 2000° C. or less, and part or the whole of the metal or metal oxide after combustion of the molded article of the gas generating composition has a melting point not lower than the combustion flame temperature;
and
(B) bulk combustion residues remain in the combustion chamber at the time of combustion of the molded article of the gas generating composition.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/213,067Filed 7 Aug 2002 · us provisional application
Priority: JP 2001-24455210 Aug 2001
Published: US 2003/0051630 A120 Mar 2003
Granted: 15 Feb 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B60R 21/2644
Using instantaneous generation of gas, e.g. pyrotechnic: using only solid reacting substances, e.g. pellets, powder
C06D 5/06
Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets: by reaction of two or more solids
B60R 2021/2633
Using a variable source, e.g. plural stage or controlled output: with a plurality of inflation levels
B60R 2021/2648
Using only solid reacting substances, e.g. pellets, powder: comprising a plurality of combustion chambers or sub-chambers