SUBMARINE Russian patent published in 1998 - IPC

FIELD: shipbuilding; submarines equipped with lifesaving appliances. SUBSTANCE: submarine is provided with flexible envelopes with load-bearing net on their outside, winch whose rope is connected with net through adjustable brake, pressure gas source with adjusting and shut-off fittings between flexible envelope and pressure gas source. Safety valve is fitted in lower portion of flexible envelope. Control of shut-off fittings is effected from differential pressure sensor whose cavities are connected with submarine interior and surrounding water medium. Flexible envelope is provided with check valves in its upper and lower parts. Fitted in series relative to upper check valve is controllable valve for bleeding air from flexible envelope. Flexible envelopes are located in chambers equipped with hinged covers on upper portion of submarine hull, mainly in her extremities. EFFECT: enhanced resistance to damage of submarine and improved technical characteristics through reduction of submarine mass. 3 cl, 3 dwg