AIRCRAFT CANOPY MANUAL OPENING MECHANISM Russian patent published in 2004 - IPC

FIELD: aeronautical engineering; mechanisms for opening and closing aircraft canopy at absence of pressure in canopy pneumatic control system. SUBSTANCE: proposed mechanism includes hydraulic pump operating during motion of common shaft on which outer and inner handles are mounted which is connected with second passage of three-position four- way distributor; mechanism includes also bell crank whose one arm may be brought in contact with rods of pistons of two pneumatic pushers connected with opening and closing pneumatic lines; it is connected with distributor position control member which connects first passage with fourth one and second passage with third one in one position; in other position it connects first passage with third one and second passage with fourth one; in third position, it connects all four passages. Bell crank is connected with mode selector through rod mounted inside shaft. Besides that, proposed mechanism includes pneumo-hydraulic cylinder of power drive connected with pneumatic lines of canopy opening and closing system by means of pneumatic cavities and with third and fourth passages of distributor by means of hydraulic cavities; mechanism is provided with hydraulic accumulator connected with hydraulic pump inlet and opening pneumatic line and controllable valve which is connected with closing pneumatic line, with first and second passages of distributor, with hydraulic accumulator and with thermo-valve. EFFECT: enhanced reliability. 4 cl, 1 dwg