Abstract: Provided is a gas generator which is reduced in weight and size while maintaining a sufficient strength as a pressure vessel. A gas generator (1) includes a housing (4) in a tubular shape having an opening (10) on at least one end thereof and a plug (12) inserted in the opening (10), so that an end portion (11) on the opening side is reduced in diameter and caulked in a caulking groove (13) of the plug (12), to thereby seal the opening (10), in which: the caulking groove (13) is a streak groove that extends along the periphery of the plug (12) and is rectangular in section; and the caulking groove (13) has at least one of side walls (14) forming the calking groove (13), the one side wall (14a) being closer to the center of the housing, which is orthogonal or sloped to the opening side, with respect to the axis (X) of the housing (4).

Abstract: A method of manufacturing a perforated pipe for a gas generator, including a pipe-like member forming step of forming a closed-bottom pipe-like member from a plate-like member by press-forming using a rod-like member and a mold; and a hole punching step of inserting a die into the pipe-like member in place of the rod-like member, the die including one or more through holes in a direction intersecting an axial direction thereof, and punching through the pipe-like member formed in the pipe-like member forming step with a punching member aligned with a position of each through hole to form one or more pairs of opposed punch holes; wherein a distance between the paired punch holes is any value selected from 3 mm to 10 mm.

Abstract: A cylinder-shaped gas generator includes an elongated and circular cylindrical housing, a working gas generation chamber and a filter chamber provided within the housing, and an igniter. The working gas generation chamber mainly contains a dividing member and a granular gas generating agent. The dividing member has a circular cylindrical portion, a bottom portion and a hollow portion. The granular gas generating agent is stored in the portion of the working gas generation chamber excluding the hollow portion. The bottom portion of the dividing member is configured to have a tapered shape such that its outer shape is reduced in size in accordance with a decrease in the distance from the igniter.

Abstract: A cylinder-shaped gas generator includes a cylindrical housing, an igniter, a dividing member, and a gas generating agent. The dividing member includes a cylindrical portion, a bottom portion, a first communication hole, and a hollow portion. The gas generating agent is stored in a working gas generation chamber excluding the hollow portion. Assuming that the outer diameter of the housing is set at R1, the diameter of the working gas generation chamber is set at R2, the distance between the bottom portion and the edge of the first communication hole located closest to the bottom portion is set at L1 and the distance between the bottom portion and the end of the working gas generation chamber on the igniter side is set at L2, the conditions of 15 mm?R1?22 mm, L1?10 mm and 0.026?L2/R2?0.71 are satisfied.

Abstract: Provided is a gas generator which is reduced in weight and size while maintaining a sufficient strength as a pressure vessel. A gas generator (1) includes a housing (4) in a tubular shape having an opening (10) on at least one end thereof and a plug (12) inserted in the opening (10), so that an end portion (11) on the opening side is reduced in diameter and caulked in a caulking groove (13) of the plug (12), to thereby seal the opening (10), in which: the caulking groove (13) is a streak groove that extends along the periphery of the plug (12) and is rectangular in section; and the caulking groove (13) has at least one of side walls (14) forming the calking groove (13), the one side wall (14a) being closer to the center of the housing, which is orthogonal or sloped to the opening side, with respect to the axis (X) of the housing (4).

Abstract: A gas generator includes an elongated cylindrical housing, a partition plate partitioning the space within the housing into a gas generating agent storing chamber and a filter chamber in the axial direction, and an igniter. A filter is made of a cylindrical member having a hollow portion extending in the axial direction of the housing. The partition plate includes an annular plate portion covering the end face of the filter closer to the gas generating agent storing chamber, a cylindrical portion continuously extending from the inner circumferential edge of the annular plate portion into the hollow portion of the filter to cover the inner circumferential surface of the filter closer to the end face, and a communication hole defined by the inner circumferential surface of the cylindrical portion and providing communication between the gas generating agent storing chamber and the filter chamber.