Patent ID: 6789566
Filing Date: 2004-09-14
Classification: A62C,F16K,F16L,Y10T

Abstract:
A safety device for systems using gas, comprising:a gas shut-off element with a closure part, the gas shut-off element being disposed in a connecting line, the gas shut-off element having an open position and a closed position, and the gas shut-off element responding to the incorrect escape of gas by moving from the open to the closed position; an operating cylinder which is arranged on the gas shut-off element and whose actuating piston is coupled mechanically to the closure part of the gas shut-off element and is held in the open position of the gas shut-off element by the pressure of a liquid-gas cartridge acting on the operating cylinder and against the force of a closing spring; a vent valve, on the operating cylinder, which relieves the pressure on the actuating piston if it is moved from a blocking position to an open position, the vent valve being controlled electrically by means of a gas sensor arranged in the area to be monitored by the safety device, wherein the vent valve can be moved mechanically into its blocking position and held in this position against the prevailing pressure by an electromagnet.