Shutoff valve

Shutoff valve for a pipeline or a container comprising a housing forming an axially extending flow passageway with a valve seat formed by said housing and encircling the axis of the flow passageway, a flap shaped cutoff part pivotally mounted in the flow passageway, an actuator located exteriorly of said housing and extending therethrough and connected to said cutoff part so that said cutoff part can be pivoted from a first position in sealed contact with said valve seat blocking flow through the flow passageway and at least one other position permitting flow through the flow passageway, said cut off part having a pair of oppositely directed face surfaces extending transversely of the axis of the flow passageway in the first position of said cutoff part, a circumferential edge bordering said cutoff part and extending between said face surfaces, and a pivot axis spaced from the face surfaces on said cutoff part, said pair of face surfaces comprising a first face surface facing said valve seat in the first position of said cutoff part and an oppositely directed second face surface, a pivot shaft having a first end and a second end, said pivot shaft secured at the first end to the second face surface of said cutoff part and extending outwardly from the circumferential edge thereof, a ball member located at the second end of said pivot shaft, means in said housing for mounting said ball member in a universally pivotal and tiltable manner to initially disengage the cutoff part from the first position, means on said cutoff part diametrically opposite said pivot shaft for connecting said actuator to said cutoff part, said actuator comprises an axially extending shifter rod displaceable in the axial direction thereof and having a first end secured to said means for connecting said actuator and a second end spaced outwardly from said flow passageway in said housing, said means for connecting said actuator to said cutoff part comprises a sliding guide located in one of said cutoff part and said shifter rod and a guide pin secured in the other one of said shifter rod and cutoff part and extending into said sliding guide, said sliding guide extending generally in the axial direction of said shifter rod and said guide pin extending transversely of the axial direction of said shifter rod, said sliding guide disposed obliquely with respect to the axial direction of said shifter rod so that the axial displacement of said shifter rod and the engagement of said guide pin in said sliding guide effects the pivotal and tiltable movement of said cutoff part between the first position and said at least one other position thereof, said shifter rod is displaceable only in the axial direction, and said sliding guide has a generally axially extending section extending helically relative to the axis of said shifter rod for effecting a rotational movement of said guide pin for pivotally and tiltable displacing said cutoff part between the first position and the at least one other position.