An inflator for generating inflation gases for a safety device includes a filter having a main body portion constructed of metal and an opening passing through the main body portion in an axial direction. The opening has a first end with a first diameter at a first axial side of the main body portion and a second end with a greater, second diameter at a second axial side of the main body portion. A plate disposed in the housing axially separates a filter chamber containing the filter and a combustion chamber containing at least one gas generant material. The plate includes a weakened zone which opens in response to an increase in pressure within the combustion chamber with a plurality of petals axially extending into the filter chamber. A first axially extending portion of the filter is adjacent the plate and opposes radial movement of the plurality of petals upon opening of the weakened zone into the filter chamber.

A dual stage inflator includes a housing defining an internal cavity including a combustion chamber. The combustion chamber includes a first portion having a first gas generant material separated from a second portion having a second gas generant material. A gas generant retaining wall is disposed in the housing. A first stage ignition device is disposed in the first portion of the combustion chamber. A second stage ignition device is disposed in the second portion of the combustion chamber. A lid normally closes the second portion of the combustion chamber and is spaced from the gas generant retaining wall. The lid is moveable to an open position opening the second portion of the internal cavity to release combustion gas and abutting the gas generant retaining wall in response to an increase of pressure within the second portion of the combustion chamber. An outer side of the lid and the adjacent side of the gas generant retaining wall are cooperatively configured to allow a flow of combustion gas between the gas generant retaining wall and the lid when the lid abuts the gas generant retaining wall in the open position.

Provided is a gas generator including the housing with a gas discharge port. The housing has a circular shape and includes a top plate, a bottom plate, and a peripheral wall, the housing having a ratio of an axial length L to an outer diameter D satisfying L/D≤1.1. The gas discharge port includes first opening portions having low burst pressure (P1) of the closing member and second opening portions having burst pressure (P2) higher than the burst pressure (P1). The first opening portions and second opening portions are formed on a circumference of a same circle in at least one of the peripheral wall or the top plate, and the first opening portion and the second opening portion, which are adjacent to each other in a circumference direction, are arranged such that an angle (θ1) formed by a first center line extending from a center of the same circle to a center of the first opening portion and a second center line extending from the center of the same circle to a center of the second opening portion is in a range from 15° to 65°.

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 gas generator including an igniter, a combustion chamber, and a restriction part, the igniter including an accommodating chamber accommodating an explosive therein, an ignition portion provided in the accommodating chamber, and a separating part including a pressure receiving surface, the separating part being configured to be separable from the igniter and movable in a predetermined direction, the combustion chamber being configured to burn a gas generating agent filled outside the accommodating chamber, by the combustion of the explosive, the restriction part provided in a predetermined position in the predetermined direction from the igniter and restricting a movement of the separating part, and the separating part including a guide that directs the combustion product of the explosive by the pressure receiving surface toward the igniter, in a state where the movement of the separating part in the predetermined direction is restricted by the restriction part.

A disc-shaped pyrotechnic gas generator includes a housing with a plurality of diffusion holes. A pyrotechnic substance is arranged in the housing. A filter is arranged in the housing. A containment member is arranged in the housing between the pyrotechnic substance and the filter. A drainage member is arranged in the housing between the pyrotechnic substance and the containment member. The filter is to provide support to a supported portion of the containment member at a start of operation of the gas generator.

A gas generator including an outer vessel including a housing provided with a gas discharge port, the outer vessel accommodating therein an igniter and a gas generating agent, wherein any of surfaces of the outer vessel includes an annular fragile portion, and the annular fragile portion is a groove formed in a continuous annular shape or a groove formed in a discontinuous annular shape.

The invention relates to a gas generator (10), particularly a pyrotechnical tube gas generator, with an axial longitudinal direction (L), comprising an ignition unit (20), a combustion chamber (30) axially mounted downstream from the ignition unit (20) and comprising a combustion chamber bottom (35) forming a combustion chamber outlet (36), and a filter chamber (70) that is axially mounted downstream of the combustion chamber (30). According to the invention, at least one guiding sleeve (50) and a front-side baffle plate (80) are formed in the filter chamber, a first end (51) of the guiding sleeve (50), on the side of the combustion chamber, being axially mounted downstream from the combustion chamber bottom (35), and a second end (53) of the guiding sleeve (50) being associated with the baffle plate (80), a first deflection section being formed on the baffle plate (80) and the guiding sleeve (50) which allows a gas flow to an outer side of the guiding sleeve (50) into an annular first discharge chamber (75).

Gas generator for a safety system, comprising: at least one pyrotechnic substance arranged to produce gases; a first part; a second part; a third part; and a fourth part separate from the previous parts, the first part and the second part being friction-welded to the third part. The gas generator is characterised in that the fourth part comprises: a first interface for positioning with the first part, and a second interface for positioning with the second part, such as to temporarily block at least one degree of freedom between the first and second parts in order to allow the first and second parts to be simultaneously friction-welded to the third part.

An inflator for generating inflation gases for a safety device includes a filter having a main body portion constructed of metal and an opening passing through the main body portion in an axial direction. The opening has a first end with a first diameter at a first axial side of the main body portion and a second end with a greater, second diameter at a second axial side of the main body portion. A plate disposed in the housing axially separates a filter chamber containing the filter and a combustion chamber containing at least one gas generant material. The plate includes a weakened zone which opens in response to an increase in pressure within the combustion chamber with a plurality of petals axially extending into the filter chamber. A first axially extending portion of the filter is adjacent the plate and opposes radial movement of the plurality of petals upon opening of the weakened zone into the filter chamber.