FIELD: valving.
SUBSTANCE: anchor is provided with a multi-step cylindrical bore made coaxially to the outer side. The greater step is positioned from the side of the inlet nozzle. The bore receives two control devices spaced by a separating washer and provided with valving members. The valving member is made of axially movable valving member made of a flexible elastomeric material. One face of the valving member bears on the face of the inner bore of the anchor for engaging the other face with spring pressed with respect to the bearing face of the separating washer. The force required to compress the spring which faces the inlet nozzle is greater than that required for compression of the spring mounted from the side of the nozzle. The space of the internal bore of the anchor is connected with the its outer longitudinal groove and atmosphere through the radial passage.
EFFECT: enhanced reliability.
2 dwg
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