Rupturable member

• US 20050206145A1
• Filed: 02/24/2005
• Published: 09/22/2005
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Kato, Kazuhiro, Niwa, Hirotoshi, Oda, Shingo, Kurihara, Yuji
• Granted Patent: US 7,607,688 B2
• Time in Patent Office: Days
• US Class Current: 280/737
• CPC Class Codes: B60R 2021/26029 Ignitors
• CPC Class Codes: F42B 3/04 for producing gas under pressure generators of inflation fluid especially adapted for vehicle air bags B60R21/26
• CPC Class Codes: Y10T 137/1744 Specific weakening point

Abstract

A rupturable member in which the rupturing manner thereof can be controlled, and a gas generator using the rupturable member are provided. A fragile portion that ruptures preferentially and regulates the rupturing direction of the rupturable member is formed, the rupturable member being provided with a stress dispersion portion formed in a shape or structure to disperse stress when the rupturable member is ruptured, in the tip end of the fragile portion or forward for the rupturing direction of the fragile portion.

Claims

1. A rupturable member that ruptures due to pressure or an impact wave, having a fragile portion that ruptures preferentially and regulates the rupturing direction of the rupturable member and a stress dispersion portion, formed in a shape or structure to disperse stress during the rupturing of the rupturable member, in the tip end of the fragile portion or forward for the rupturing direction of the fragile portion.

2. The rupturable member as claimed in claim 1, wherein the fragile portion is formed in a linear shape, and the stress dispersion portion is provided in both ends in the length direction of the fragile portion formed in a linear shape.

3. The rupturable member as claimed in claim 1 or claim 2, wherein the stress dispersion portion is formed in a circular shape with reduced thickness, and the thickness of the stress dispersion portion is formed to be less than the thickness of the base surface of the fragile portion.

4. The rupturable member as claimed in claim 1 or claim 2, wherein the rupturable member is formed in a flat plate shape, spherical or curved surface shape, and the fragile portion is formed in at least one of the upper surface or rear surface of the rupturable member formed in the flat plate or spherical shape.

5. The rupturable member as claimed in claim 1 or claim 2, wherein the rupturable member is formed as a hollow cylindrical body in which one end or both ends are closed, and the fragile portion is formed in the side wall of the rupturable member formed as a hollow cylindrical body.

6. A gas generator mounted in an automobile for discharging a gas upon impact,

wherein the gas generator comprising a rupturable member that, during the activation thereof, ruptures due to pressure or an impact wave to discharge a gas,

and the rupturable member as claimed in claim 1 or claim 2 is used as the rupturable member.