Patent ID: 8550428

Claim:
A gas tap having a built-in electromagnetic safety valve for the regulation of a gas flow to a domestic cooking appliance or a stove, the gas tap having a tap body and a regulation member located within the tap body for regulating the gas flow through the tap, the safety valve located within a housing of an elongate gas pipe formed unitarily with and as a part of the tap body, the safety valve situated downstream the regulation member within the tap body, the housing having an inlet opening to permit gas flow through the housing to a gas outlet located in the elongate gas pipe, the safety valve having an elongate electromagnetic actuator coupled to a seal member that is urged by a spring to rest against a seat within the tap body to occlude flow through the inlet opening, the actuator located within the gas flow path of the elongate gas pipe and comprising a coil positioned within an elongate magnetic steel capsule and powered by a DC voltage, an elongate magnetic frame located and moveable within the elongate magnetic steel capsule that has a first surface, and a stationary magnetic core having a base comprising a segment located within the elongate magnetic steel capsule with a second surface opposing the first surface of the magnetic frame, the ratio of the length of the electromagnetic actuator with the distance between the first and second surfaces is between 6.6 and 13.2 when the seal member rests against the seat, the actuator configured to move the seal member off the seat to permit a maximum gas flow through the gas tap when a supply current passes through the coil, each of the elongate magnetic steel capsule, coil, elongate magnetic frame, seal member and seat having a central axis substantially in common with a central axis of the elongate gas pipe and each being located entirely within the elongate gas pipe.