Gas generator for restraining device
First Claim
1. A gas generator, comprising:
- a housing forming an outer shell and including a top plate, a bottom plate and a circumferential wall provided with a gas discharge port;
an ignition device chamber provided in the housing and defined by a cylindrical container which has one end closed, and accommodating an ignition device;
a combustion chamber formed to surround the ignition device chamber and charged with a gas generating agent;
an annular or disk-shaped filter arranged to face the top plate and form a gap with the circumferential wall; and
an annular retainer supporting the filter, the annular retainer being formed by a combination ofa first retainer includinga filter support portion being formed by an annular flat-plate and abutting against a lower surface of the filter,an annular wall surface portion positioning at an outer circumference of the filter support portion and extending towards the bottom plate,an annular flat-plate portion extending radially outward from the annular wall surface portion, anda tubular wall portion extending axially from the annular flat-plate portion and being fixed to the circumferential wall of the housing, anda second retainer including,a tubular support surface portion supporting an outer circumferential surface of the filter, andan annular support bottom portion extending radially inward from the tubular support surface portion,the first retainer and the second retainer being combined such that the annular support bottom portion of the second retainer positions between the annular flat-plate portion of the first retainer and the lower surface of the filter and that an inner circumferential edge of the annular support bottom portion of the second retainer abuts against the annular wall surface portion,at least a part of the lower surface and the outer circumferential surface of the filter being supported by the combination of the first retainer and the second retainer.
1 Assignment
0 Petitions
Accused Products
Abstract
A gas generator includes, a housing, an ignition device chamber, a combustion chamber, a filter facing a top plate of the housing, and a retainer supporting the filter and having first and second retainers. The first retainer includes a filter support abutting a lower surface of the filter, an annular wall positioned at outer circumference of the filter support, a plate portion extending outward from the annular wall, and a tubular wall extending axially from the plate portion, and the second retainer includes a support surface supporting the outer circumferential surface, and a support bottom extending inward from the support surface. The support bottom is positioned between the plate portion and the lower surface and that an inner circumferential edge of the support bottom abuts the annular wall surface. At least a part of the lower surface and the outer circumferential surface is supported by the first and second retainers.
40 Citations
9 Claims
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1. A gas generator, comprising:
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a housing forming an outer shell and including a top plate, a bottom plate and a circumferential wall provided with a gas discharge port; an ignition device chamber provided in the housing and defined by a cylindrical container which has one end closed, and accommodating an ignition device; a combustion chamber formed to surround the ignition device chamber and charged with a gas generating agent; an annular or disk-shaped filter arranged to face the top plate and form a gap with the circumferential wall; and an annular retainer supporting the filter, the annular retainer being formed by a combination of a first retainer including a filter support portion being formed by an annular flat-plate and abutting against a lower surface of the filter, an annular wall surface portion positioning at an outer circumference of the filter support portion and extending towards the bottom plate, an annular flat-plate portion extending radially outward from the annular wall surface portion, and a tubular wall portion extending axially from the annular flat-plate portion and being fixed to the circumferential wall of the housing, and a second retainer including, a tubular support surface portion supporting an outer circumferential surface of the filter, and an annular support bottom portion extending radially inward from the tubular support surface portion, the first retainer and the second retainer being combined such that the annular support bottom portion of the second retainer positions between the annular flat-plate portion of the first retainer and the lower surface of the filter and that an inner circumferential edge of the annular support bottom portion of the second retainer abuts against the annular wall surface portion, at least a part of the lower surface and the outer circumferential surface of the filter being supported by the combination of the first retainer and the second retainer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification