Patent ID: 8297264

Claim:
Valve for the control of a gas stream, comprising: a valve housing enclosing a valve chamber, at least one pressure-sided inlet and at least one suction-sided outlet, where between the pressure-sided inlet and the suction-sided outlet at least one valve opening is arranged, which links the pressure-sided inlet with the suction-sided outlet, an elastically movable control membrane arranged at the valve housing which dependent on the pressure in the valve chamber and a reference pressure reduces or increases the flow cross section in the area of the at least one valve opening and/or opens or closes the at least one valve opening, characterized by a first device comprising an auxiliary membrane connected to the control membrane, wherein the first device exerts a first force on the control membrane in such a way that with at least one of a decreasing reference pressure and an increasing inlet pressure, the first force exerted by the first device on the control membrane in opposite direction to the closure direction of the valve increases.