AIRCRAFT DOOR-RAMP Russian patent published in 2023 - IPC B64C1/24 B64C1/14 

FIELD: aircraft building.

SUBSTANCE: invention relates to the field of aircraft building and concerns unloading and loading of passengers. An aircraft door-ramp contains a panel with fixed steps and a folding-unfolding mechanism. The panel is made three-layered with spars installed on it, brackets of a door suspension are fixed in a lower part. Handrails are fixed with one end to handrail holders fixed on a panel of a door opening, and with the other end to the three-layered panel, using racks pivotally fixed to handrails and the three-layered panel. The handrail contains the main handrail and pipes welded to it, which are connected at one point and welded to a cylindrical handrail case. The folding-unfolding mechanism of rigid handrails contains racks and gas extension springs attached to racks and the three-layered panel, and brackets are fixed on spars, in which there are catchers for rack gears. A retainer is placed on a handrail sleeve. The door-ramp is equipped with an emergency reset mechanism. Outer and inner handles of an opening-closing mechanism, as well as outer and inner handles of emergency reset are respectively connected to each other, using a system of thrusts and rockers.

EFFECT: increase in the reliability and safety, manufacturability, reduction in a load on crew, when using a door-ramp.

9 cl, 18 dwg