Pyrotechnic gas generator having a movable combustion chamber
First Claim
1. A pyrotechnic gas generator comprising two parts fixed relative to each other, a tubular component having a closed end and an open end positioned against one of the said parts, means interposed between said component and the other of said parts for releasably holding said open end of said component against said one part, a combustion chamber defined within said tubular component, a pyrotechnic charge and means for igniting said charge located in said chamber, means defining a cooling chamber, at least one aperture connecting said cooling chamber to the exterior of said generator, and at least one charge of solid coolant located in said cooling chamber, said open end of said component being movable away from said one part by gas pressure in said combustion chamber, and an orifice of variable through flow area being defined between said component and said one part when said component is moved away from said one part, said orifice interconnecting said combustion chamber and said cooling chamber for flow of gas therebetween.
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Accused Products
Abstract
A pyrotechnic gas generator for inflating safety cushions in vehicles, including a device for regulating the operating pressure and/or limiting the maximum gas pressure in the generator, comprises a combustion chamber defined in a cup-shaped member having its open end releasably held against a casing part and movable away from the casing part, by the gas pressure in the combustion chamber, to open up an injection orifice of variable through flow area which connects the combustion chamber with a cooling chamber containing solid coolant.
68 Citations
16 Claims
- 1. A pyrotechnic gas generator comprising two parts fixed relative to each other, a tubular component having a closed end and an open end positioned against one of the said parts, means interposed between said component and the other of said parts for releasably holding said open end of said component against said one part, a combustion chamber defined within said tubular component, a pyrotechnic charge and means for igniting said charge located in said chamber, means defining a cooling chamber, at least one aperture connecting said cooling chamber to the exterior of said generator, and at least one charge of solid coolant located in said cooling chamber, said open end of said component being movable away from said one part by gas pressure in said combustion chamber, and an orifice of variable through flow area being defined between said component and said one part when said component is moved away from said one part, said orifice interconnecting said combustion chamber and said cooling chamber for flow of gas therebetween.
Specification