Patent ID: 6877436

Claim:
A gas generator comprising a container ( 12 ) filled with a highly pressurized fluid ( 14 ) in a non-activated state and having an outflow opening ( 16 ) closed in said non-activated state, and a piston ( 20 ; 120 ) which is displaceably arranged in said container ( 12 ) and has a shutter opening ( 22 ; 122 ) dividing said container ( 12 ) into a first chamber ( 24 ) and a second chamber ( 26 ), said first and second chambers ( 24 , 26 ) being filled with said fluid ( 14 ), said piston ( 20 ; 120 ) on activation of said gas generator ( 10 ; 100 ) and when said outflow opening ( 16 ) has been opened, being moved by a pressure prevailing in said second chamber ( 26 ) from a predetermined initial position (AP) in a direction towards said outflow opening ( 16 ) into an end position (EP) in which a volume of said first chamber ( 24 ) is significantly reduced compared with a start volume of said first chamber ( 24 ).