Messerschmitt-boelkow-blohm Gmbh

Mbb Gmbh

Artur Kupfernagel

Dieter Nitsch

A mechanically operable actuating device for opening towards the outside and closing a cargo hatch or freight door in the fuselage of an aircraft comprises two hinges for connecting an upper side of the door or hatch to the fuselage; a first swivel joint floatingly mounts the upper end of a coupling member to a reenforcing part in the upper portion of the hatch or door; a second swivel joint floatingly connects a rocking arm to a hatch or door frame of the fuselage; a third swivel joint connects the rocking arm to the lower end of the coupling member; a fourth swivel joint connects one end of a gas pressure spring to the rocking arm so that the spring extends substantially parallel to the coupling member; and a fifth swivel joint connects an opposite end of the spring also to the upper end of the coupling member.

Door/hatch actuation

A single lever is pivotable about two axes and pivoting can be carried out in a prescribed sequence such that first the latches are unloaded and thereafter released, in the reverse, the latches are first latched and thereafter proper latching is monitoring and the latches are locked. The structure includes two shafts that are operated by the lever and they carry respectively latch hooks and cams for latching and scanning these hooks.

Growing community of inventors

Stuhr, Germany

Artur Kupfernagel