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GAS GENERATOR

  • US 20110239891A1
  • Filed: 03/29/2011
  • Published: 10/06/2011
  • Est. Priority Date: 03/30/2010
  • Status: Active Grant
First Claim
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1. A gas generator comprising:

  • a housing (11) formed by a diffuser shell (12) having a gas discharge port (14) and a closure shell (13), a first combustion chamber (31) defined in the housing (11) and a first gas generating agent (33) charged in the first combustion chamber,in the first combustion chamber (31), an ignition chamber cup (32) defining an ignition chamber (30) and a second combustion chamber cup (41) defining a second combustion chamber (40) being aligned at a distance in the radial direction,a first igniter (21) being accommodated in the ignition chamber (30) inside the ignition chamber cup (32), a first communication hole (34), for causing communication with the first combustion chamber (31) at the time of actuation, being provided in a circumferential wall portion (32c) of the ignition chamber cup (32),a second igniter (25) and a second gas generating agent (43) being accommodated in the second combustion chamber (40) inside the second combustion chamber cup (41), a second communication hole (42), for causing communication with the first combustion chamber (31) at the time of activation, being provided in a circumferential wall portion (41c) of the second combustion chamber cup (41),a cup-shaped cover member (50) covering the second combustion chamber cup (41) and closing the second communication hole (42),a disk-shaped retainer (60), for retaining the first gas generating agent (33), being disposed in the housing (11) and provided with a first opening (62) and a second opening (63),the disk-shaped retainer (60) being mounted by fitting the ignition chamber cup (32) through the first opening (62) and putting the second combustion chamber cup (41) through the second opening (63), and an annular gap (70) being formed between the second opening (63) and the cover member (50) covering the second combustion chamber cup (41).

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