Airbagaufblasvorrichtung

摘要

An inflator comprises a source of gas for inflating on inflatable vehicle occupant restraint, such as an air bag. The air bag, when inflated, restrains an occupant of a vehicle during a collision. A burst disk is located to block gas flow into the air bag. A piston is movable from a retracted position to an extended position to rupture the burst disk. The piston includes (i) a first central portion for puncturing the burst disk and (ii) a second portion for cutting out a portion of the burst disk after the first central portion punctures the burst disk. After the second portion of the piston cuts out a portion of the burst disk, the cut out portion of the burst disk is clamped between the piston and a housing part of the inflator.