VALVE WITH SUPPLYING FLUID UNDER VALVING MEMBERS Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: valving member is connected with a sensor of a hydraulic drive. The valving member and sensor are provided with a through passageway, which connects the control space of the drive with the inlet passageway of the housing. In the through passageway is a check valve and its plunger. A pilot valve is connected with the control space of the drive. The effective area of the member of the drive is greater than the area of the opening of the seat. The spindle is rigidly secured to the plunger of the check valve. On the spindle is a stop interacting with the member of the drive for permitting pressing the member to the seat. The pilot valve is in communication with the output passageway. The flowing section of the check valve exceeds that of the pilot valve. EFFECT: enhanced reliability. 3 cl, 2 dwg