HATCH CLOSURE Russian patent published in 2003 - IPC

FIELD: hatch closures. SUBSTANCE: proposed hatch closure includes cover moving over rollers and provided with chain drive mounted on hatch cover and consisting of geared motor with anti-cocking shaft. Mounted at ends of said shaft are drive sprockets thrown into engagement with roller chains laid along cover guides. Said guides hold cover hoisting mechanisms. Cover drive is connected with hoisting mechanism by means of chains. Hoisting mechanism includes swivel cams and levers-pushers mounted under cover rollers. Thus, cover may be hoisted, moved and lowered by one drive located on hatch cover. EFFECT: enhanced reliability. 4 dwg