A gas generator, includes an igniter, a housing provided with a gas discharge port, and including a combustion chamber to burn a gas generating agent, the igniter being shifted from a center of a cluster of the gas generating agent, an isolating part surrounding at least a portion of the cluster of the gas generating agent, and forms, between the isolating part and a predetermined area, a gas flow space serving and a plurality of communicating parts that are provided in the isolating part and connect the combustion chamber and the gas flow space, a portion of the plurality of communicating parts allowing a combustion product generated by combustion of the gas generating agent disposed proximal to the igniter to flow into the gas flow space, and another portion of the plurality of communicating parts allowing a combustion product flowing through the gas flow space to flow out toward the gas generating agent disposed distal to the igniter.

A dual stage inflator for an inflatable vehicle safety device includes a second stage combustion cup having a first member and a second member. The first and second members are formed separately from one another and cooperate to define an interior for receiving a second stage gas generant material.

A gas generator includes, a housing provided with a gas discharge port, an ignition chamber, accommodating an igniter and a transfer charge, provided on an end portion of the housing, a combustion chamber disposed within the housing and accommodating a gas generating agent, a rupturable closing member partitioning the combustion chamber from the ignition chamber and including a rupturable portion ruptured upon an actuation of the gas generator, and an inner tube extending from the closing member toward the gas discharge port inside the combustion chamber. The inner tube defines outside thereof a space containing the gas generating agent, and defines inside a hollow space. The inner tube is provided with a plurality of through holes. The inner tube includes one end communicating the hollow space with the ignition chamber to transfer the transfer charge in a burning state toward an opposite end when the rupturable portion is ruptured.

A gas generator for a safety device in a vehicle includes a housing and a combustion chamber located inside the housing. A pyrotechnic propellant and at least one filling body are accommodated in the combustion chamber. The filling body is made of a melamine resin foam.

The disclosure relates to a gas generator—for a vehicle safety system, comprising an ignition unit including a holding element, an igniter and a base. The base is formed by one single plastic injection molding such that the igniter is embedded in the base and the base is injection-molded to the holding element. A membrane which hermetically seals an inner first opening of the holding element is provided.

Gas generating compositions according to various implementations comprise an oxidizer comprising a metal nitrate. A secondary oxidizer may be used and can be chosen from alkali metal and alkaline earth metal salts of perchloric acid. The gas generating compositions also comprise a fuel selected from tetrazoles and tetrazole derivatives. A secondary fuel may be used and can be a nitrogen containing organic compound or a metal carbide. Optionally, the gas generating compositions may comprise additional additives.

The invention relates to an overigniting protection device (40) for a multi-stage gas generator (10), comprising a combustion chamber limiting element (34) for limiting a combustion chamber (30) of a second ignition stage (14) of the gas generator (10) as well as an overigniting protection element (38) which is arranged on a side of the combustion chamber limiting element (34) remote from the combustion chamber (30), wherein the overigniting protection element (38) covers the side of the combustion chamber limiting element (34) remote from the combustion chamber (30), wherein the overigniting protection element (38) is tightly connected to the combustion chamber limiting element (34) via a mounting portion (42) and wherein the overigniting protection element (38) is substantially plate-shaped or completely covers the side of the combustion chamber limiting element (34) remote from the combustion chamber (30). Furthermore, the invention relates to a second ignition stage (14) of a multi-stage gas generator, a gas generator (10) and an airbag module comprising a gas generator (10).

A gas-generating pyrotechnic composition has a high gas yield while having reduced generation of condensable species and a limited combustion temperature.

A protection system comprises at least one inflatable safety structure, each associated with a gas generator that can be activated by an external command, wherein the external command comprises an electrical signal from an automated system that is responsible for the critical safety functions of a vehicle, corresponding to predictive information about an impact. The gas generator is configured to generate a gas over a time period such that the total inflation time of the inflatable structure is greater than 50 milliseconds. The inflatable structure may be waterproof.

The disclosure relates to a gas generator for a vehicle safety system, comprising an ignition unit, a propellant configured in a combustion chamber in a form of a propellant bed extending along a longitudinal axis of the gas generator. A sleeve having an axial opening protrudes into the propellant bed such that it surrounds the ignition unit at least partially and portions of the propellant are stored inside and outside the sleeve.