AIRCRAFT RETRACTABLE UNDERCARRIAGE STRUT Russian patent published in 2015 - IPC B64C25/10 B64C25/58 

FIELD: transport.

SUBSTANCE: invention relates to aircraft (AC) alighting gears and concerns retractable undercarriage designs. Ac retractable undercarriage strut contains lever with wheel gimbal-mounted on fuselage, gear centring hydraulic cylinder with locks of extended and retracted position, where cylinder chambers are connected with AC hydraulic system, and gas-hydraulic shock-absorber one end of which is pivotally connected with the lever and the other - with fuselage. Hydraulic cylinder and shock-absorber are made articulated. Rods of hydraulic cylinder and shock-absorber are installed coaxially being capable to reciprocate relative to each other and to from cavities in one of which gas chamber is located and in the other liquid chamber is located. Hydraulic cylinder is provided with accumulating cavity with dividing piston and mechanical lock the elements of which are made capable to fix dividing piston in extended position and to contact with lock of retracted position.

EFFECT: reduced quantity of assembly units for attachment to AC due to execution of combined aggregate - shock-absorber - hoist, reduced structural dimensions and weight.

4 cl, 5 dwg