Inflator and airbag module
First Claim
1. An inflator for a protective device in a vehicle, comprising:
- a diffuser forming a substantially rotation-symmetric external housing of the inflator with a closing member, wherein the diffuser includes a plurality of discharge orifices arranged in a row and which are of circular shape; and
an igniter sleeve which at least partially encloses an igniter and an igniter chamber filled with a booster charge and is adjacent to a first combustion chamber filled with fuel and;
wherein the igniter sleeve includes a marker distant from a central axis (B) or extending non-symmetrically from the central axis (B) which indicates a predetermined orientation of the igniter sleeve;
a combustion chamber sleeve that surrounds a second combustion chamber;
wherein the igniter sleeve, related to the central axis (B) of the igniter sleeve, has overflow orifices unevenly distributed in a circumferential direction to define a maximum angular range (α
) less than 180°
such that all inflation fluid exits the igniter sleeve over an angular range less than 180°
, each of the overflow orifices being directed in a direction that does not intersect the combustion chamber sleeve.
1 Assignment
0 Petitions
Accused Products
Abstract
An inflator for a protective device in a vehicle includes a diffuser (10) forming a substantially rotation-symmetric external housing of the inflator with a closing member (12), wherein the diffuser (10) includes a plurality of discharge orifices (78) arranged in a row, and which are of circular shape. The inflator also includes an igniter sleeve (38) which at least partially encloses an igniter (34) and an igniter chamber (42) filled with a booster charge and is adjacent to a first combustion chamber (44) filled with fuel, wherein the igniter sleeve (38), related to a central axis B of the igniter sleeve (38), has overflow orifices (98) unevenly distributed in circumferential direction.
77 Citations
21 Claims
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1. An inflator for a protective device in a vehicle, comprising:
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a diffuser forming a substantially rotation-symmetric external housing of the inflator with a closing member, wherein the diffuser includes a plurality of discharge orifices arranged in a row and which are of circular shape; and an igniter sleeve which at least partially encloses an igniter and an igniter chamber filled with a booster charge and is adjacent to a first combustion chamber filled with fuel and;
wherein the igniter sleeve includes a marker distant from a central axis (B) or extending non-symmetrically from the central axis (B) which indicates a predetermined orientation of the igniter sleeve;a combustion chamber sleeve that surrounds a second combustion chamber; wherein the igniter sleeve, related to the central axis (B) of the igniter sleeve, has overflow orifices unevenly distributed in a circumferential direction to define a maximum angular range (α
) less than 180°
such that all inflation fluid exits the igniter sleeve over an angular range less than 180°
, each of the overflow orifices being directed in a direction that does not intersect the combustion chamber sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An inflator for a protective device in a vehicle, comprising:
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a diffuser forming a substantially rotation-symmetric external housing of the inflator with a closing member, wherein the diffuser includes a plurality of discharge orifices arranged in a row and which are of circular shape; and an igniter sleeve which at least partially encloses an igniter and an igniter chamber filled with a booster charge and is adjacent to a first combustion chamber filled with fuel, wherein the igniter sleeve, related to a central axis (B) of the igniter sleeve, has overflow orifices unevenly distributed in a circumferential direction, wherein the igniter sleeve includes a marker distant from the central axis (B) or extending non-symmetrically from the central axis (B) which indicates a predetermined orientation of the igniter sleeve, and wherein the igniter sleeve includes a nose or a recess as the marker and wherein the igniter sleeve has a configuration which is adapted to a configuration of a neighboring component of the inflator such that mounting of the igniter sleeve in the inflator is possible at the predetermined orientation only; wherein the igniter sleeve is offset with respect to a central axis (A) of the diffuser and a bottom of the igniter sleeve is opposed to a ceiling portion of the diffuser, wherein the igniter sleeve bottom has a slant adapted to a curvature of the ceiling portion of the diffuser such that the igniter sleeve fits below the ceiling portion of the diffuser at the predetermined orientation only, and wherein the igniter sleeve is radially tapered in an axial direction toward the bottom of the igniter sleeve.
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20. An inflator for a protective device in a vehicle, comprising:
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a diffuser forming a substantially rotation-symmetric external housing of the inflator with a closing member, wherein the diffuser includes a plurality of discharge orifices arranged in a row and which are of circular shape; and an igniter sleeve which at least partially encloses an igniter and an igniter chamber filled with a booster charge and is adjacent to a first combustion chamber filled with fuel, wherein the igniter sleeve, related to a central axis (B) of the igniter sleeve, has overflow orifices unevenly distributed in a circumferential direction, wherein the first combustion chamber is associated with a first activating stage of the inflator, as well as a combustion chamber sleeve which at least partially encloses a second combustion chamber filled with fuel and associated with a second activating stage of the inflator, wherein an axial distance of an open side of the igniter sleeve from a bottom of a closing member of the inflator is unequal to an axial distance of an open side of the combustion chamber sleeve from the bottom of the closing member, the distance of the igniter sleeve being larger, and wherein the igniter sleeve and the combustion chamber sleeve are attached to a first igniter carrier or to a second igniter carrier, wherein the axial height of the contact area between the igniter sleeve and the first igniter carrier is larger than the axial height of the contact area between the combustion chamber sleeve and the second igniter carrier; wherein both the igniter sleeve is raised a pressure developed during combustion of the booster charge and the combustion chamber sleeve is raised by a pressure developed during combustion of the fuel in a direction of a ceiling portion of a diffuser of the inflator, wherein by raising the combustion chamber sleeve a discharge orifice in the form of a discharge gap is released which leads out of the combustion chamber sleeve, whereas no discharge orifice is released by raising the igniter sleeve.
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21. An inflator for a protective device in a vehicle, comprising:
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a diffuser forming a substantially rotation-symmetric external housing of the inflator with a closing member, wherein the diffuser includes a plurality of discharge orifices arranged in a row and which are of circular shape; and an igniter sleeve which at least partially encloses an igniter and an igniter chamber filled with a booster charge and is adjacent to a first combustion chamber filled with fuel, wherein the igniter sleeve, related to a central axis (B) of the igniter sleeve, has overflow orifices unevenly distributed in a circumferential direction, wherein the first combustion chamber is filled with the fuel which is associated with a first activating stage of the inflator and is closed on one side by a lid, wherein a first fill member is disposed between the fuel and the lid, wherein the first fill member has at least one circular recess into which an igniter sleeve associated with the first activating stage of the inflator or a combustion chamber sleeve associated with a second activating stage of the inflator projects; wherein the first fill member has two recesses of different size, wherein the igniter sleeve projects into a smaller recess and the combustion chamber sleeve projects into a larger recess; wherein a ratio of a diameter of the larger recess to a diameter of the smaller recess is between 1.52 and 2.25; and wherein the first fill member is designed in at least two parts, each of the two partial members has a shape of a double half moon.
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Specification