TELESCOPIC IN-FLIGHT REFUELLING RECEPTACLE Russian patent published in 1995 - IPC

FIELD: aviation. SUBSTANCE: telescopic refuelling receptacle has outer pipe 1, inner movable pipe 4, damping device which consists of pistons 18 and 19 and chamber 20, locking unit made in form of ball lock which consists of piston 15, spring 16 and retainers 17. Mounted on inner movable pipe 4 is axle box 9 with radial holes 10, stops 11 and 12; secured on axle box is concentric sleeve 13 having holes 14. Ball lock is arranged in circular clearance between inner movable pipe 4 and sleeve 13. Fuel pipe 21 is secured in pipe 1. Supply of working medium for extension and retraction of movable pipe 4, as well as for supply of working medium to chamber 20 of damping device and piston 15 of ball lock is effected through holes 22, 23, 24 and 25. EFFECT: enhanced reliability. 1 dwg