Pyrotechnic gas generator with combustion and diffusion chambers of different sections
First Claim
1. A pyrotechnic gas generator comprising:
- a first chamber having a generally cylindrical shape;
a pyrotechnic charge disposed in the first chamber prior to combustion of the pyrotechnic charge;
an initiator associated with the pyrotechnic charge;
a second chamber communicating with the first chamber, receiving gases generated by the pyrotechnic charge, and transferring the gases to atmosphere through at least one evacuation opening, the second chamber extending parallel to a longitudinal axis of the first chamber and having a generally cylindrical shape with a cross section less than a cross section of the first chamber at a junction of the first chamber and the second chamber; and
at least one protective cap that gives way only when the predetermined gas pressure is reached in the first chamber;
wherein the pyrotechnic charge is disposed proximate to the junction of the first chamber and the second chamber.
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Accused Products
Abstract
A pyrotechnic gas generator intended for motor-vehicle safety includes a combustion chamber of cylindrical or approximately cylindrical shape. An initiator is located within the combustion chamber and is associated with at least one solid pyrotechnic charge. A diffusion chamber communicates with the combustion chamber and receives gases generated by the pyrotechnic charge and transfers the gases to atmosphere via at least one evacuation opening. The diffusion chamber extends parallel to the longitudinal axis of the combustion chamber, in the extension of one of its end faces. The diffusion chamber is also of generally cylindrical or approximately cylindrical shape, but with a cross section that is less than that of the combustion chamber. The diffusion chamber is devoid of structure for filtering the gases that pass therethrough.
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Citations
22 Claims
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1. A pyrotechnic gas generator comprising:
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a first chamber having a generally cylindrical shape; a pyrotechnic charge disposed in the first chamber prior to combustion of the pyrotechnic charge; an initiator associated with the pyrotechnic charge; a second chamber communicating with the first chamber, receiving gases generated by the pyrotechnic charge, and transferring the gases to atmosphere through at least one evacuation opening, the second chamber extending parallel to a longitudinal axis of the first chamber and having a generally cylindrical shape with a cross section less than a cross section of the first chamber at a junction of the first chamber and the second chamber; and at least one protective cap that gives way only when the predetermined gas pressure is reached in the first chamber; wherein the pyrotechnic charge is disposed proximate to the junction of the first chamber and the second chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification