The present invention provides an inflator including a rupturable plate closing between the ignition device chamber having a gas discharge port and the pressurized gas chamber filled with a pressurized gas; a partition wall provided with a rod axially separating an interior of an ignition device unit housing, corresponding to the ignition device chamber, into two chambers; a combustion chamber provided on the side of a first end of the ignition device unit housing and provided with an igniter, and a diffuser chamber having the gas discharge port and provided on the side of a second end, which is an opposite end to the first end, the rupturable plate being circular and having, a circumferential edge fixing portion and a circular non-fixing portion on an inner portion other than the circumferential edge fixing portion, a fragile portion formed by not less than three grooves provided on a first surface facing the bottle, the grooves extending from a circumference of the circular non-fixing portion or from positions in the vicinity thereof, as a start point, toward a center of the circular non-fixing portion such that each of end points of the grooves does not reach the center of the circular non-fixing portion, the rod fixed to the partition wall and extending toward the rupturable plate, and the rod colliding with the rupturable plate due to a gas pressure generated by activation of the igniter, coming into contact with all of the end points in the fragile portion and rupturing the rupturable plate.

The present invention provides an inflator including a rupturable plate closing between the ignition device chamber having a gas discharge port and the pressurized gas chamber filled with a pressurized gas; a partition wall provided with a rod axially separating an interior of an ignition device unit housing, corresponding to the ignition device chamber, into two chambers; a combustion chamber provided on the side of a first end of the ignition device unit housing and provided with an igniter, and a diffuser chamber having the gas discharge port and provided on the side of a second end, which is an opposite end to the first end, the rupturable plate being circular and having, a circumferential edge fixing portion and a circular non-fixing portion on an inner portion other than the circumferential edge fixing portion, a fragile portion formed by not less than three grooves provided on a first surface facing the bottle, the grooves extending from a circumference of the circular non-fixing portion or from positions in the vicinity thereof, as a start point, toward a center of the circular non-fixing portion such that each of end points of the grooves does not reach the center of the circular non-fixing portion, the rod fixed to the partition wall and extending toward the rupturable plate, and the rod colliding with the rupturable plate due to a gas pressure generated by activation of the igniter, coming into contact with all of the end points in the fragile portion and rupturing the rupturable plate.

The present invention inflator (10) has an inflator housing (12), a diffuser (30), a frangible closure (40) and an igniter assembly (20). The igniter assembly (20) has an igniter housing (22), a squib (60) electrically actuated and fitted in an end of the igniter housing (22) and a retractable piston (50) affixed to the igniter housing (22). Upon actuation of the squib (60), the retractable piston (50) propels forward breaking the frangible closure (40) releasing gases pushing the piston (50) retractably back into or over the igniter housing (22) as the pressurized gas releases out of the diffuser (30).

The present invention inflator (10) has an inflator housing (12), a diffuser (30), a frangible closure (40) and an igniter assembly (20). The igniter assembly (20) has an igniter housing (22), a squib (60) electrically actuated and fitted in an end of the igniter housing (22) and a retractable piston (50) affixed to the igniter housing (22). Upon actuation of the squib (60), the retractable piston (50) propels forward breaking the frangible closure (40) releasing gases pushing the piston (50) retractably back into or over the igniter housing (22) as the pressurized gas releases out of the diffuser (30).

The invention relates to a hybrid inflator (10) includes at least one combustion chamber (15) in which propellant charge is arranged and which has a discharge end (20), the propellant charge being formed of at least one propellant element (26), at least one igniting unit (12) by which the propellant charge can be ignited. The hybrid inflator (10) also includes at least one bursting element (14, 14, 14) which in the inactivated state of the hybrid inflator (10) delimits the combustion chamber (15) against a gas supply chamber (16) at the discharge end (20). The bursting element (14, 14, 14) and a restraint element (18, 18, 18) maintain the propellant charge in its position and/or the bursting element (14, 14, 14) and the propellant charge delimit a shock gas volume (SGV), wherein in the activated state of the hybrid inflator (10) the shock gas volume (SGV) acts on the bursting element (14, 14, 14) like a gas pressure spring.

The invention relates to a hybrid inflator (10) includes at least one combustion chamber (15) in which propellant charge is arranged and which has a discharge end (20), the propellant charge being formed of at least one propellant element (26), at least one igniting unit (12) by which the propellant charge can be ignited. The hybrid inflator (10) also includes at least one bursting element (14, 14, 14) which in the inactivated state of the hybrid inflator (10) delimits the combustion chamber (15) against a gas supply chamber (16) at the discharge end (20). The bursting element (14, 14, 14) and a restraint element (18, 18, 18) maintain the propellant charge in its position and/or the bursting element (14, 14, 14) and the propellant charge delimit a shock gas volume (SGV), wherein in the activated state of the hybrid inflator (10) the shock gas volume (SGV) acts on the bursting element (14, 14, 14) like a gas pressure spring.

An inflator (10), especially for a vehicle safely system, includes a combustion chamber (16) in which a solid propellant (18) combustible under the generation of gas is accommodated, and a compressed gas chamber (24) containing compressed gas (26), wherein even in the non-activated state of the inflator (10) a fluid communication exists between the combustion chamber (16) and the compressed gas chamber (24). The compressed gas (26) contains at least one inert gas as well as oxygen and at least one combustible gas, wherein the combustible gas is provided at a concentration at which no self-supporting conversion of the combustible gas with oxygen takes place.

A dual-stage hybrid inflator and triggering a method thereof are provided. The dual-stage hybrid inflator includes a main casing, a central pipe, and a disc set, a first propellant chamber assembly, a second propellant chamber assembly, a pressurized gas, a first igniter assembly, a second igniter assembly and an exhaust hood. The main casing includes a bottom housing and an upper housing. The central pipe is fixed with the bottom housing and passed through the upper housing. A convective hole is disposed on the central pipe. The disc set, which is used to prevent the gas escaping from the main casing, is disposed on the top of the central pipe. The doublet propellant chamber, which is filled with different dosage of propellant, is initiated by the igniters disposed thereon in order to generate various degrees of gas depended on various degrees of collision.

A dual-stage hybrid inflator and triggering a method thereof are provided. The dual-stage hybrid inflator includes a main casing, a central pipe, and a disc set, a first propellant chamber assembly, a second propellant chamber assembly, a pressurized gas, a first igniter assembly, a second igniter assembly and an exhaust hood. The main casing includes a bottom housing and an upper housing. The central pipe is fixed with the bottom housing and passed through the upper housing. A convective hole is disposed on the central pipe. The disc set, which is used to prevent the gas escaping from the main casing, is disposed on the top of the central pipe. The doublet propellant chamber, which is filled with different dosage of propellant, is initiated by the igniters disposed thereon in order to generate various degrees of gas depended on various degrees of collision.

A vehicle airbag device is provided, the vehicle airbag device including (1) an airbag that is folded and stowed inside an airbag case, the airbag being inflated and deployed on being supplied with gas, (2) a mid-collision gas supply section that supplies gas into the airbag during a vehicle collision, and (3) a pre-collision gas supply section that, in a case in which it has been determined prior to a vehicle collision that a vehicle collision is unavoidable, supplies gas into the airbag at a lower temperature than a temperature of gas supplied into the airbag from the mid-collision gas supply section.