Method of bringing to readiness an inflatable airbag of safety device, (embodiments), safety device for a vehicle (embodiments), valve device

A method of bringing to readiness an inflatable airbag, including the parameter-adjustable filling with gas of an airbag through its inlet, from a gas source comprising a reservoir with a pressurized working medium, the adjustment of the airbag-filling, including the change of pressure of the working medium in the gas source, characterized in that liquefied carbon dioxide in the used as the working medium, the pressure of liquefied carbon dioxide in the reservoir being controlled by changing its temperature.

A safety device installed inside a vehicle, comprising an inflatable airbag having an inlet for receiving gas filling the airbag to its ready state, and a system for supplying gas to the airbag, including a gas source, a valve device, and a triggering unit, characterized in that the valve device is formed by a pneumatic distributor having two stable positions:

• an open position wherein gas from the gas source is fed to the airbag through its inlet, and a closed position wherein the gas flow through the airbag inlet is interrupted.

A safety device installed inside a vehicle, comprising an inflatable airbag having an inlet for receiving gas filling the airbag until the ready state is reached, and a system for supplying gas to the airbag, including a gas source comprising a reservoir filled with a pressurized working medium, a valve device inserted between the airbag inlet and the gas source, a triggering device, characterized in that the reservoir is filled with liquefied carbon dioxide serving as the working medium.

A valve device comprising a control valve and a main valve connected with it and mounted between the low-pressure space and the high-pressure space the main valve comprising a hollow body defining a valve cavity and having a first duct connecting the valve cavity with the low-pressure space and a second duct connecting the valve cavity with the high-pressure space, a valve seat being mounted in the first duct, comprising at least one annular flange defining a circular passage tapering towards the low-pressure space, and a stop member including a movable dome-shaped shutoff device with its vertex facing the first duct and coaxial therewith, and a guide, the movable dome-shaped shutoff device and the guide both located inside the valve cavity and telescopically joined together, characterized in that provided within the guide is a first cavity with an outside opening in the direction of first duct and coaxial therewith, and a second cavity with an outside opening in the direction of the second duct and coaxial therewith, the first and second cavities being connected with the control valve capable of alternately connecting either the first and second cavities to each other, or the first cavity with the atmosphere, and plugs in the direction of the control valve of the second cavity.