Cool burning gas generant compositions for an automotive inflatable restraint system are provided that include a bismuth-containing compound selected from the group consisting of: bismuth citrate, bismuth subsalicylate, bismuth hydroxide, copper bismuth hydroxy nitrate, bismuth subcarbonate, bismuth suboxalate, and combinations thereof. The gas generant comprises at least one copper-containing component. The gas generant includes at least one oxidizer, fuel, and optional coolant. The maximum flame temperature at combustion (T.sub.c) of less than or equal to about 1700K (1,427° C.). The cool burning gas generant composition generates liquid phase combustion products making it suitable for use in a filterless inflatable restraint system. Copper and bismuth present in the cool burning gas generant composition react to form an alloy having a melting point at or near the maximum flame temperature at combustion (T.sub.c).

An inflator for generating inflation gases for a safety device includes a housing having an internal cavity including a combustion chamber and a filter chamber. A filter is disposed in the filter chamber. A separating member is disposed in the housing on a first axial side of the filter and separates the filter chamber from the combustion chamber. An insulating member is disposed in the filter chamber on a second axial side of the filter. The second axial side is opposite the first axial side. The separating member is coupled to the insulating member.

An igniter assembly includes an igniter, a collar, and a holding part, a cup body having a cylindrical peripheral wall and a lid wall and a closing part defining an accommodating space with the cup body, the peripheral wall is sectioned, in an axial direction, into a contact region in contact with the closing part and a noncontact region not in contact with the closing part, the holding part includes a base part covering the contact region and a surrounding wall formed continuously to the base part and surrounding the noncontact region, and a fragile part is formed in the holding part between a first area including at least a part of the base part and a second area including a tip end of the surrounding wall, and thus the second area deforms radially outward preferentially when a load is applied to the surrounding wall by the igniter activated.

A technique of improving pressure resistance performance of an igniter assembly is provided. The igniter assembly includes an igniter body including an ignition portion filled with an igniting charge and an electro-conductive portion extending from the ignition portion, an igniter collar including a tubular peripheral wall portion that surrounds at least the electro-conductive portion of the igniter body, and a resin molded article that is interposed between the igniter body and the igniter collar and integrates the igniter body and the igniter collar. The igniter collar includes a first support portion that is provided in an inner peripheral portion of the peripheral wall portion and is formed in a convex shape toward an inner side of the peripheral wall portion in a radial direction and thus buried in the resin molded article and a second support portion that is provided at a position in the inner peripheral portion proximal to the first support portion from the ignition portion in a direction along a center axis of the peripheral wall portion and is formed in a convex shape toward the inner side of the peripheral wall portion in the radial direction and thus buried in the resin molded article or formed in a concave shape toward an outer side of the peripheral wall portion in the radial direction and thus filled with the resin molded article.

Provided is a gas-generating agent composition containing the components (a) to (d) below, in which a content of the following (d) calcium carbonate is 5 mass % or less: (a) guanidine nitrate; (b) a basic metal nitrate; (c) a binder; and (d) calcium carbonate.

The disclosure relates to a gas generator fora vehicle safety system. The gas generator has a longitudinal axis, an outer housing in the form of a compressed-gas container. In an inoperative state of the gas generator, the housing is filled with compressed gas. The housing is closed at one housing end with a closure element by a welded joint, which extends along the longitudinal axis from the welded joint into the housing. The housing has at least one bead for mechanically relieving the welded joint of load. A bead base of the bead is provided in a region of an axial longitudinal extent of the closure element.

A roof airbag apparatus may include: a first-row deployment part deployed from the front to the rear of a roof so as to cover a front area, when gas is supplied from a gas supply part; a second-row deployment part coupled to a front end of the first-row deployment part so as to communicate with the first-row deployment part, and configured to cover a rear area which is deployed to the rear when the first-row deployment part is deployed; and an auxiliary deployment part coupled to a top or bottom surface of the first-row deployment part so as to communicate with the first-row deployment part, and configured to increase/decrease the top-to-bottom thickness of the first-row deployment part, when deployed.

The disclosure relates to a gas generator for a vehicle safety system, comprising a first ignition stage, and a second second ignition stage. The first ignition stage comprises a cup-shaped diffuser with a diffuser base and an adjacent diffuser sidewall (57). The first ignition stage, the diffuser and the second ignition stage are arranged along an axial longitudinal axis of the gas generator and the diffuser is positioned between the first and second ignition stages such that the second ignition stage is fastened on an outer area of the diffuser.

An airbag inflator includes a pressure vessel, an initiator positioned at one end of the pressure vessel, a manifold positioned at an opposite end of the pressure vessel, and a generant holder assembly secured in the pressure vessel adjacent the initiator. The generant holder assembly defines an annular space that is configured to secure a generant. A center of the generant holder assembly is open. The open center allows a pressure wave from the initiator to travel to the outlet burst disk.

The invention relates to a hybrid gas generator (10) which comprises a compressed gas chamber (20) and an igniting unit (30), wherein the compressed gas chamber (20) is closed by a first igniter-side bursting membrane (21) and a second bursting membrane (22). According to the invention, a first, rapidly burning-off pyrotechnic agent (51) and a second pyrotechnic agent (52) burning off slowly in comparison to the first pyrotechnic agent (51) are located in the hybrid gas generator (10), wherein the second bursting membrane (22) is openable by positive pressure which can be generated in the compressed gas chamber (20) and the first pyrotechnic agent (51) is separated from the second pyrotechnic agent (52) in such a manner that the positive pressure in the compressed gas chamber (20) for opening the second bursting membrane (22) can be generated by the first pyrotechnic agent (51).