DEVICE FOR REPAIR OF HOLE IN SHIP'S HULL Russian patent published in 1998 - IPC

FIELD: shipbuilding. SUBSTANCE: device for repair of hole in ship's hull includes hollow load-bearing cylinder with seat mounted in its lower portion and shut-off mechanism including flap valve engageable with above-mentioned seat. Load-bearing cylinder is provided with circular cylinder of larger diameter. Sliding cylinder located in cavity between load-bearing cylinder and circular cylinder is provided with rubber seal fitted on upper end which is mounted on load-bearing cylinder for motion along it. Cavity formed between lower surface of sliding cylinder, bottom and walls of circular and load-bearing cylinders is brought in communication with inner cavity. Bottom of circular cylinder is provided with holes. Pressure nut is fitted with ring on which pushers are secured. Pushers are engageable with sliding cylinder through holes in bottom of circular cylinder. EFFECT: enhanced reliability. 2 cl, 2 dwg