Emergency opening cylinder of a passenger door for an airplane, a door system and a method of modifying a door system
AssigneeEurocopter Deutschland GmbH
InventorsStefan Blum, Thomas Nickl, Wolfgang Spellmeier
Life of this patent
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Abstract
An emergency opening cylinder of a passenger door of an airplane is provided. An existing emergency opening cylinder is adapted at the lowest expenditures and with an insignificant increase in weight with respect to its operating characteristic to the load situation of an emergency opening of the door against the force of gravity. A ventilation bore of the emergency opening cylinder leads into a collecting chamber which has an outlet valve controllable by a control.
Claims12
Gas operated emergency opening cylinder having a piston rod for swivelling a passenger door of an airplane, the emergency opening cylinder being a component of an emergency opening system of the passenger door, the emergency opening cylinder being arranged in use on a carrying arm bearing and carrying the door, with the piston rod being connected with the door, the emergency opening cylinder having a ventilation bore in an end area of its cylinder space through which the piston rod passes,
- wherein the ventilation bore (18) leads into a collecting chamber (19) which has an outlet valve (20) controllable by a control (21).
A method of modifying an airplane door emergency opening system which includes:
- a compressed gas source, and
- a piston cylinder unit including a cylinder and a piston movably disposed in said cylinder and operable in use to open an airplane door in response to gas supplied from the compressed gas source, said cylinder having a ventilation bore in an area of this cylinder space through which the piston rod passes,
- said method comprising installing a collecting chamber with a controllable outlet valve around the cylinder and the ventilation bore to thereby control escape of the compressed gas to the atmosphere and thereby increase the operating stroke of the cylinder piston unit.
An airplane vehicle door assembly comprising:
- a door movable between a fuselage opening closed and open position;
- and
- an emergency opening system for opening the door including:
- a compressed gas source,
- a piston cylinder unit including a cylinder and a piston movably disposed in said cylinder and operable in use to open an airplane door in response to gas supplied from the compressed gas source, said cylinder having a ventilation bore in an area of this cylinder space through which the piston rod passes, and
- a collecting chamber with controllable outlet valve disposed around the cylinder and the ventilation bore to thereby control escape of the compressed gas to the atmosphere and thereby increase the operating stroke of the cylinder piston unit.
Dependencies are inferred from the claim text.