GAS GENERATOR

• US 20160362082A1
• Filed: 01/05/2015
• Published: 12/15/2016
• Est. Priority Date: 01/09/2014
• Status: Active Grant

• Current Assignee: Daicel Corporation
• Original Assignee: Daicel Corporation
• Inventors: OKUYAMA, Takashi
• Granted Patent: US 9,944,249 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 2021/26029 Ignitors
• CPC Class Codes: B60R 2021/26076 characterised by casing
• CPC Class Codes: B60R 2021/2642 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/264 using instantaneous generation of gas, e.g. pyrotechnic B60R21/268 takes precedence

Abstract

The present invention provides a gas generator including, inside a housing, an ignition device chamber accommodating a transfer charge and an igniter in which an igniter main body is surrounded by an igniter collar,

• • the ignition device chamber being formed such that an inner circumferential wall surface on an opening side of an ignition device chamber cup, which is charged with the transfer charge, is press-fitted to and in close contact with an outer circumferential wall surface of the igniter collar of the igniter,
  • the ratio (Vh2/Vh1) of an average Vickers hardness (Vh1) of the igniter collar, which is measured by a method described in Examples, and an average Vickers hardness (Vh2) of the ignition device chamber cup, which is measured by a method described in Examples, being within a range of 0.25 to 0.65.

Claims

1. A gas generator comprising, inside a housing, an ignition device chamber accommodating a transfer charge and an igniter in which an igniter main body is surrounded by an igniter collar,

the ignition device chamber being formed such that an inner circumferential wall surface on an opening side of an ignition device chamber cup, which is charged with the transfer charge, is press-fitted to and in close contact with an outer circumferential wall surface of the igniter collar of the igniter,

the ratio (Vh2/Vh1) of an average Vickers hardness (Vh1) of the igniter collar, which is measured by a method described in Examples, and an average Vickers hardness (Vh2) of the ignition device chamber cup, which is measured by a method described in Examples, being within a range of 0.25 to 0.65.

2. The gas generator according to claim 1, wherein

the average Vickers hardness (Vh2) of the ignition device chamber cup, which is measured by the method described in Examples, is within a range of 55 to 105.

3. A gas generator comprising, inside a housing, an ignition device chamber accommodating a transfer charge and a first igniter in which a first igniter main body is surrounded by a first igniter collar, and a combustion chamber accommodating a gas generating agent and a second igniter in which a second igniter main body is surrounded by a second igniter collar,

the ignition device chamber being formed such that an inner circumferential wall surface on an opening side of an ignition device chamber cup, which is charged with the transfer charge, is press-fitted to and in close contact with an outer circumferential wall surface of the first igniter collar of the first igniter,

in the ignition device chamber, the ratio (Vh2/Vh1) of an average Vickers hardness (Vh1) of the first igniter collar, which is measured by a method described in Examples, and an average Vickers hardness (Vh2) of the ignition device chamber cup, which is measured by a method described in Examples, being within a range of 0.25 to 0.65,

the combustion chamber being formed such that an inner circumferential wall surface on an opening side of a combustion chamber cup, which is charged with the gas generating agent, is press-fitted to and in close contact with an outer circumferential wall surface of the second igniter collar of the second igniter,

in the combustion chamber, the ratio (Vh2/Vh1) of an average Vickers hardness (Vh1) of the second igniter collar, which is measured by a method described in Examples, and an average Vickers hardness (Vh2) of the combustion chamber cup, which is measured by a method described in Examples, being within a range of 0.25 to 0.65.

4. The gas generator according to claim 3, wherein

the average Vickers hardness (Vh2) of the ignition device chamber cup and the combustion chamber cup, which is measured by the method described in Examples, is within a range of 55 to 105.