GAS GENERATOR

• US 20120031294A1
• Filed: 03/16/2010
• Published: 02/09/2012
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: Nipponkayaku Kabushikikaisha
• Original Assignee: Nipponkayaku Kabushikikaisha
• Inventors: Aoyagi, Satoshi, Enami, Koichi
• Granted Patent: US 9,003,975 B2
• Time in Patent Office: Days
• US Class Current: 102/530
• CPC Class Codes: B60R 2021/26011 using a filter through which the inflation gas passes
• CPC Class Codes: B60R 2021/26076 characterised by casing
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: F16B 17/004 of rods or tubes mutually

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).

Claims

1. A gas generator which includes a housing in a tubular shape having an opening at least one end thereof and a plug inserted in the opening, so that an end portion on the opening side is reduced in diameter and caulked in a caulking groove of the plug, to thereby seal the opening,

wherein the caulking groove is a streak groove that extends along the periphery of the plug and is rectangular in section;

and

wherein the caulking groove has at least one of side walls forming the calking groove, the one side wall being closer to the center of the housing, which is orthogonal or sloped to the opening side, with respect to the axis of the housing.

2. The gas generator according to claim 1, wherein the plug is formed of one of aluminum, an aluminum alloy, a titanium alloy, and a magnesium alloy.

3. The gas generator according to claim 1, wherein the caulking groove has a depth that falls within a range of 0.02 to 0.35 times of a diameter of the plug.

5. The gas generator according to claim 2, wherein the caulking groove has a depth that falls within a range of 0.02 to 0.35 times of a diameter of the plug.

6. The gas generator according to claim 2, wherein the caulking groove has a groove width that falls within a range of 0.02 to 0.20 times of the diameter of the plug.

7. The gas generator according to claim 3, wherein the caulking groove has a groove width that falls within a range of 0.02 to 0.20 times of the diameter of the plug.

4. The gas generator according to any 1, wherein the caulking groove has a groove width that falls within a range of 0.02 to 0.20 times of the diameter of the plug.