An inflator includes a rupturable plate in a circular shape for closing an opening of a pressurized gas-filled space. The rupturable plate has a fragile portion formed by grooves in a regular polygon on one surface, including first fragile portions formed by grooves forming a circumference of the regular polygon, and second fragile portions formed by grooves extending from all apexes of the regular polygon to a center thereof creating a plurality of triangles formed by the first fragile portions as a base and the second fragile portions as the remaining two sides. The depth (h1) of the first fragile portion is less than the depth (h2) of the second fragile portion whereby, when pressure is exerted on a rear surface opposite to the fragile portions, the second fragile portions will rupture as the first fragile portions bend.

An inflator includes a rupturable plate in a circular shape for closing an opening of a pressurized gas-filled space. The rupturable plate has a fragile portion formed by grooves in a regular polygon on one surface, including first fragile portions formed by grooves forming a circumference of the regular polygon, and second fragile portions formed by grooves extending from all apexes of the regular polygon to a center thereof creating a plurality of triangles formed by the first fragile portions as a base and the second fragile portions as the remaining two sides. The depth (h1) of the first fragile portion is less than the depth (h2) of the second fragile portion whereby, when pressure is exerted on a rear surface opposite to the fragile portions, the second fragile portions will rupture as the first fragile portions bend.

The invention relates to a device (18) for securing a gas generator (14) in an oscillating manner as a vibration-absorbing mass inside an airbag module (10). The invention is characterized m that a securing ring is provided for securing to the gas generator (14), said ring being open at least in sections in the radial direction by a continuous, radially outwardly directed annular gap and is provided with at least one axially oriented damping member.

The invention relates to a combustion chamber (10) comprising an opening device for a compressed gas tank (21) of a hybrid inflator (20), wherein the combustion chamber (30) comprises a sleeve-type combustion chamber sidewall (34) confining a combustion chamber interior (31) and a combustion chamber bottom (10), wherein the opening device is arranged on a surface (11) of the combustion chamber bottom (10) facing away from the combustion chamber interior (31) and faces away from the combustion chamber interior (31). In accordance with the invention, the combustion chamber bottom (10) is tightly connected to the combustion chamber sidewall (34) so that in the case of operation the combustion chamber bottom (10) is bendable.

The invention relates to a combustion chamber (10) comprising an opening device for a compressed gas tank (21) of a hybrid inflator (20), wherein the combustion chamber (30) comprises a sleeve-type combustion chamber sidewall (34) confining a combustion chamber interior (31) and a combustion chamber bottom (10), wherein the opening device is arranged on a surface (11) of the combustion chamber bottom (10) facing away from the combustion chamber interior (31) and faces away from the combustion chamber interior (31). In accordance with the invention, the combustion chamber bottom (10) is tightly connected to the combustion chamber sidewall (34) so that in the case of operation the combustion chamber bottom (10) is bendable.

The invention relates to a hybrid inflator (10) including a burst cap (20) including a bottom (21) and a sleeve-like side wall (22), the bottom (21) and the side wall (22) delimiting an igniter compartment (23), and the burst cap (20) in the idle mode being pressurized on the outer peripheral side with compressed gas having a filling pressure (PF) which at a functional maximum temperature of the hybrid inflator (10) has a maximum filling pressure (PFmax), and wherein the burst cap (20) can be destroyed by an igniter compartment side bursting pressure in the case of operation. In accordance with the invention, a transitional portion (24) is formed from the side wall (22) of the burst cap (20) to the bottom (21) so that the igniter compartment side bursting pressure required to destroy the burst cap (20) is lower than the sum of the maximum filling pressure (PFmax) and the filling pressure (PF). The invention further relates to a burst cap, an airbag module, a vehicle safety system as well as a method of manufacturing a burst cap.

The invention relates to a hybrid inflator (10) including a burst cap (20) including a bottom (21) and a sleeve-like side wall (22), the bottom (21) and the side wall (22) delimiting an igniter compartment (23), and the burst cap (20) in the idle mode being pressurized on the outer peripheral side with compressed gas having a filling pressure (PF) which at a functional maximum temperature of the hybrid inflator (10) has a maximum filling pressure (PFmax), and wherein the burst cap (20) can be destroyed by an igniter compartment side bursting pressure in the case of operation. In accordance with the invention, a transitional portion (24) is formed from the side wall (22) of the burst cap (20) to the bottom (21) so that the igniter compartment side bursting pressure required to destroy the burst cap (20) is lower than the sum of the maximum filling pressure (PFmax) and the filling pressure (PF). The invention further relates to a burst cap, an airbag module, a vehicle safety system as well as a method of manufacturing a burst cap.

The present invention provides a gas generator including, an ignition device chamber, a gas inflow chamber, and a pressurized gas chamber being arranged from a first end fixed with an ignition device to a second end opposite thereto in a cylindrical housing, an inner circumferential wall surface of the cylindrical housing, from the ignition device chamber to the gas inflow chamber, having a first movement restricting portion, a second movement restricting portion and a stopping portion which are arranged in an axial direction at intervals in the above order so as to protrude, the second movement restricting portion having an ignition device chamber-side surface which is an inclined surface decreasing an inner diameter of the housing from the side of the ignition device chamber to the side of the gas inflow chamber and a gas inflow chamber-side surface whose angle (α1) with respect to the cylindrical housing is not more than 90 degrees, so that an axial cross-sectional shape of the second movement restricting portion is a triangle, a breaking device being arranged between the ignition device chamber and the gas inflow chamber and including a base whose outer circumferential surface abuts against an inner circumferential wall surface of the cylindrical housing and a distal end having an enlarged-diameter portion, and before actuation, the base being held between the first movement restricting portion and the second movement restricting portion, after actuation, the base being held between the surface of the second movement restricting portion whose angle al is not more than 90 degrees and the stopping portion.

The present invention provides a gas generator including, an ignition device chamber, a gas inflow chamber, and a pressurized gas chamber being arranged from a first end fixed with an ignition device to a second end opposite thereto in a cylindrical housing, an inner circumferential wall surface of the cylindrical housing, from the ignition device chamber to the gas inflow chamber, having a first movement restricting portion, a second movement restricting portion and a stopping portion which are arranged in an axial direction at intervals in the above order so as to protrude, the second movement restricting portion having an ignition device chamber-side surface which is an inclined surface decreasing an inner diameter of the housing from the side of the ignition device chamber to the side of the gas inflow chamber and a gas inflow chamber-side surface whose angle (α1) with respect to the cylindrical housing is not more than 90 degrees, so that an axial cross-sectional shape of the second movement restricting portion is a triangle, a breaking device being arranged between the ignition device chamber and the gas inflow chamber and including a base whose outer circumferential surface abuts against an inner circumferential wall surface of the cylindrical housing and a distal end having an enlarged-diameter portion, and before actuation, the base being held between the first movement restricting portion and the second movement restricting portion, after actuation, the base being held between the surface of the second movement restricting portion whose angle al is not more than 90 degrees and the stopping portion.

The present invention provides a gas generator, including in a cylindrical housing, an ignition device chamber provided with an ignition device, a gas inflow chamber having a gas discharge port and a pressurized gas chamber being arranged in the above order from the first end, a rupturable plate closing between the pressurized gas chamber and the gas inflow chamber and being fixed to an annular fixing portion, a breaking device for the rupturable plate being arranged between the ignition device chamber and the gas inflow chamber, the breaking device including a base, a rod main body which extends from the base towards the rupturable plate, and an enlarged-diameter portion at a distal end of the rod main body, and during actuation, the base moving in the axial direction, the enlarged-diameter portion being positioned inside the pressurized gas chamber after punching out the rupturable plate, and the rod main body portion being positioned so as to oppose the annular fixing portion in a radial direction, a pressurized gas passing through a gas passage and then is discharged from the gas discharge port, the gas passage including a first annular passage in which a width between the enlarged-diameter portion and the annular fixing portion varies and a second annular passage between the rod main body portion and the annular fixing portion, a cross-sectional area of the second annular passage being the smallest among the cross-sectional area of the second annular passage, an area of a minimum width portion of the first annular passage and a total opening area of the gas discharge port, and Q<(A2−A1) being satisfied when Q denotes the cross-sectional area of the second annular passage, A1 denotes an area of the punched-out rupturable plate and A2 denotes the area of the minimum width portion of the first annular passage.