Patent ID: 7059633

Claim:
A hybrid gas inflator comprising: a high-pressure gas container containing a first gas therein, said high-pressure gas container comprising an opening that is normally sealed by a pressure-resisting disc and an extension ring portion being formed around said opening; said extension ring portion having at least one exhaust outlet toward a radial direction; a connecting ring being received within said extension ring portion, said connecting ring having a partition plate at a middle level therein which separates said connecting ring into an upper ring and a lower ring having at least one gas outlet opening radially; said partition plate having a first central hole extending along an axial direction; a piston including an axle passing through said first central hole and sliding along said axial direction, a pressure-receiving portion that is formed on a top end of said axle, a bottom end of said axle extending to against said pressure-resisting disc that covers said opening of said high-pressure gas retainer, and an axial hole extending axially from said top end to said bottom end inside said axle; and a combustion chamber fixed within said extension ring portion, said combustion chamber containing a predetermined amount of second gas generant therein, and a gas exit being formed on a wall of said combustion chamber and facing to said pressure-receiving portion of said piston; wherein, a second gas being generated by means of burning said second gas generant and then escaping from said gas exit so as to press said pressure-receiving portion and to drive said piston to move axially along said axial direction; said axially moving axle, together with an axial flow of a hot jet of said second gas passing through said axial hole therein, breaking said pressure-resisting disc; said second gas entering into said high-pressure gas container to mix with and heat up said first gas in said high-pressure gas container; said first gas and said second gas forming a hybrid gas flowing out of said high-pressure gas container through said gas outlet of said connecting ring and said exhaust outlet of said extension ring portion; wherein said extension ring portion contains a tray for separating said piston and said combustion chamber; said tray having a second central hole facing said gas exit of said combustion chamber; said second central hole having a caliber greater than that of said axial hole of said piston.