Abstract: A gas generator assembly for a restraining device includes: a gas generator including, a housing, a cup-shaped diffuser having a gas discharge port and attached to one end of the housing, a cup-shaped gas flow controller assembled with the gas generator, an outer diameter of the diffuser being smaller than that of the housing, a gas flow controller having a bottom surface, a circumferential wall portion and an opening portion, the bottom surface being provided with a communication hole for allowing passage of gas flow, the circumferential wall portion surrounding the gas discharge port, the gas flow controller being attached to form a gap between a peripheral edge of the opening portion and the housing, and gas, discharged from the gas discharge port, colliding the circumferential wall portion, the gas flow being divided into both sides in an axial direction to flow out from the gap and the communication hole.

Abstract: A gas generator assembly for a restraining device includes: a gas generator including, a housing, a cup-shaped diffuser having a gas discharge port and attached to one end of the housing, a cup-shaped gas flow controller assembled with the gas generator, an outer diameter of the diffuser being smaller than that of the housing, a gas flow controller having a bottom surface, a circumferential wall portion and an opening portion, the bottom surface being provided with a communication hole for allowing passage of gas flow, the circumferential wall portion surrounding the gas discharge port, the gas flow controller being attached to form a gap between a peripheral edge of the opening portion and the housing, and gas, discharged from the gas discharge port, colliding the circumferential wall portion, the gas flow being divided into both sides in an axial direction to flow out from the gap and the communication hole.

Abstract: A gas generator has an inner cylindrical member disposed in a cylindrical housing, an annular first combustion chamber provided radially in the outside of the inner cylindrical member, and, in the combustion chamber, a ratio of its radial average distance to its axial average length is adjusted to be in the range of 0.2 to 2.0. The gas generator has a retainer which changes a flow of a gas ejected from a through-hole in the inner cylindrical member and has a cylindrical portion for collecting fluid and semifluid combustion products included in the gas.

Abstract: The invention provides a downsized gas generator for a passenger side air bag, which can supply a gas to the bag in at the time at which reaction force is most needed for restraining a vehicle occupant to be protected. The gas generator comprises a housing having a gas discharging port, an igniter to be activated by an impact, and a molded article of a gas generating agent to be ignited and burnt by the igniter for generating a combustion gas, wherein one, two, or three requirements selected from the following (a), (b), and (c) are met: (a) an internal volume of a gas generator is 200 to 400 cm3; (b) a ratio L/D of an axial length L of a gas generator to a diameter D is 0.6 to 1.5; and (c) an amount of gas of a molded article of a gas generating agent is 1.5 to 4.5 mol.

Abstract: The invention provides a downsized gas generator for a passenger side air bag which can supply a gas to the bag in time with the timing at which the reaction force is needed most for restraining of a vehicle occupant to be protected.

Abstract: The present invention provides an electric type initiator having a stable electric characteristic, and thereby provides an electric type initiator having better reliability and an initiator assembly using the same.

Abstract: The present invention provides a gas generator in which ignition and combustion performance of a gas generating agent and operation performance are enhanced. An inner cylindrical member 4 is disposed in a cylindrical housing 3, an annular first combustion chamber 5a is provided radially in the outside of the inner cylindrical member 4, and, in the combustion chamber 5a, a ratio (D/L) of its radial average distance (D) to its axial average length (L) is adjusted to be in the range of 0.2 to 2.0. The invention provides a gas generator for an air bag capable of reducing a size of the gas generator and easily and reliably adjusting a capacity of a combustion chamber which accommodates the gas generating agent, and also provides a retainer for such a gas generator.