VALVE Russian patent published in 2000 - IPC

FIELD: flying vehicle control systems. SUBSTANCE: valve has body with delivery, control and drain passages which are separated from one another. Body is provided with two sleeves having coaxial bores inside them for movably receiving the pusher. Sleeves have holes on either side from pusher whose outer edges are engageable with shut- off members made in form of balls. One ball (on side of drain passage) is engageable with spring-loaded rod moving inside stator of electromagnetic drive also mounted on body. Control passage is brought in communication either with drain line or with delivery line depending on position of rod. Bush with spring-loaded plunger is fitted in valve body. End face of plunger is engageable with shut-off member on side of delivery line. Amount of motion of balls and their diameters, as well as forces of spring acting on balls on side of drain and delivery lines respectively are related by ratio of 1:10. Outer surface of rod is coated with non-magnetic material. EFFECT: enhanced reliability and safety of structure; possibility of creating relationship of hydrodynamic forces in inner cavities of valve ensuring preset requirements for disconnection of valve. 2 dwg