| abstract |
A hybrid air bag inflator is provided including an elongated first pressure chamber storing a compressed gas with first and second apertures; a first membrane sealing the first aperture; a second membrane for sealing the second aperture; a tube fluidly connecting with the first aperture and extending a substantial portion of the length of the first pressure chamber; a second pressure chamber mounted adjacent the first pressure chamber exposed to the first membrane; an igniter within the second chamber; a pyrotechnic material packaged within the second pressure chamber; a piston with a first end mounted in the tube and a second end for puncturing the second membrane, the piston being held in position within the central opening of the diffuser cap by a rupturable retainer; and a deflector ring mounted on the piston and encircling the same. |