FIELD: hatch covers. SUBSTANCE: hatch cover has corrugated plate with holes for attachment members which provide upsetting of sealing gasket on bearing surface. Corrugations of plate are formed by spherical ridges interconnected by channel-shaped members with cylindrical surface. Flanged edges are of corner section. Made in flanged edges under holes of corrugated plate are radial slots of diameter equal to diameter of attachment members and U-shaped plates with projections are installed. EFFECT: enhanced reliability of closing, reduced material usage. 6 cl, 4 dwg
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|---|---|---|---|
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