DEVICE FOR HOISTING AIRCRAFT FROM HYDRAULIC HOISTS BY THREE UNDERCARRIAGE LEGS Russian patent published in 2003 - IPC

FIELD: aviation equipment; hoisting aircraft from three hydraulic hoists by three legs. SUBSTANCE: proposed device includes hoisting mechanism provided with hydraulic jack and double-arm lever connected with ears of leg lever by means of feathering hinge whose one end rests against leg lever and projection of second end is engageable with dimple of hydraulic jack rod. Hoist mechanism is provided with T-shaped platform made from two beams. Secured on longitudinal beam of platform are two flanges located vertically along beam; plate with recess made in it is located on beam between flanges; said recess is used for receiving the base of hydraulic jack; longitudinal beam with hydraulic jack is located under nose leg between wheels in the course of hoisting process. Proposed device includes also two hoisting mechanisms for bogies of two main legs. Each mechanism is provided with platform of the said shape; secured on longitudinal beam of platform are two flanges on either side vertically located along beam; two plates are located on beam between flanges; recesses of these plates receive bases of two hydraulic jacks which are similar to said hydraulic jacks; longitudinal beam of platform with two hydraulic jacks is located under main leg bogie; dimples of hydraulic jack rods are engageable with two projections of leg bogie; each plate of all said mechanisms is provided with mechanism for fixed motion; device includes also three rigid clips fitted on extended rods of shock absorbers of three undercarriage legs. Proposed device improves conditions for performing technological jobs in shifting aircraft from hydraulic hoists to hydraulic jacks. EFFECT: enhanced efficiency and reliability. 10 dwg