Door arrangement with articulated arm, aircraft area with door arrangement and aircraft with aircraft area

{
  "publication_number": "US11518491B2",
  "country": "US",
  "kind": "B2",
  "title": "Door arrangement with articulated arm, aircraft area with door arrangement and aircraft with aircraft area",
  "abstract": "A door arrangement for an aircraft comprising a door designed to close an aperture in an outer skin of the aircraft, and a articulated arm which is fixed by a first end to the door and which is designed to move the door in at least two translational directions and at least two rotational directions. An aircraft area with this door arrangement and an aircraft having such an aircraft area are furthermore provided. The aircraft area comprises a door aperture arranged in an outer skin of an aircraft, and a door arrangement. Here the door of the door arrangement may be designed to close the door aperture from an inside of the outer skin, and the articulated arm of the door arrangement may be fixed to the aircraft area.",
  "claims": [
    "1. A door arrangement for an aircraft, comprising: a door, configured to close an aperture in an outer skin of the aircraft, an articulated arm, fixed by a first end to the door, and configured to move the door in at least two translational directions and at least two rotational directions, wherein the articulated arm comprises: at least two arm members, a first articulated link arranged between the two arm members, a second articulated link arranged at the first end of the articulated arm, and a third articulated link arranged at the second end of the articulated arm, wherein the second articulated link arranged at the first end of the articulated arm is configured to turn about at least two axes of rotation, the two axes of rotation running perpendicular to one another, or the third articulated link arranged at the second end of the articulated arm is configured to turn about at least two axes of rotation, the two axes of rotation running perpendicular to one another.",
    "2. The door arrangement according to claim 1, further comprising: an overlay, portions of which, at least, are arranged on a periphery of the door and which is configured to at least one of brace or seal the door in relation to an element surrounding the door aperture.",
    "3. The door arrangement according to claim 1, wherein the door is produced from a sandwich material, and the door, in a predefined portion along at least one edge of the door, has a smaller cross sectional thickness than at a center of the door.",
    "4. The door arrangement according to claim 3, wherein the sandwich material of the door comprises a core of a honeycomb structure.",
    "5. The door arrangement according to claim 4, wherein the core is composed of aluminum.",
    "6. The door arrangement according to claim 4, wherein the core is composed of a phenolic resin-impregnated material.",
    "7. An aircraft area, comprising: a door aperture arranged in an outer skin of an aircraft; and a door arrangement according to claim 1, the door of the door arrangement being configured to close the door aperture from an inside of the outer skin, and the articulated arm of the door arrangement being fixed to the aircraft area.",
    "8. The aircraft area according to claim 7, the door comprising a peripheral area, which overlaps with at least one of the outer skin or a component of the aircraft area arranged thereon when the door closes the door aperture.",
    "9. The aircraft area according to claim 7, wherein the articulated arm is configured to arrange the door by rotation relative to the door aperture, the projected area of the door in a top view of the door aperture, at least in parts, not overlapping the projected area of the door aperture.",
    "10. The aircraft area according to claim 7, the aircraft area in an area between a main door frame and a former arranged for the main door frame comprising no additional stringers or no reinforcements running in the longitudinal direction of the aircraft.",
    "11. The aircraft having at least one aircraft area according to claim 7.",
    "12. A door arrangement for an aircraft, comprising: a door, configured to close an aperture in an outer skin of the aircraft, an articulated arm, fixed by a first end to the door, and configured to move the door in at least two translational directions and at least two rotational directions, wherein the articulated arm comprises: at least two arm members, a first articulated link arranged between the two arm members, a second articulated link arranged at the first end of the articulated arm, and a third articulated link arranged at the second end of the articulated arm, wherein at least one of the arm members comprises at least two portions and being configured to move at least the two portions relative to one another in a longitudinal direction of the respective arm member.",
    "13. The door arrangement according to claim 12, wherein at least the one arm member comprises a linear drive configured to move the two portions relative to one another."
  ],
  "description_excerpt": "The invention relates to a door arrangement having an articulated arm, which moves a door of the door arrangement in at least two translational directions and at least two rotational directions. The invention further relates to an aircraft area having such a door arrangement and an aircraft having such an aircraft area.\n\nAn aircraft door and an area of an aircraft fuselage surrounding a door aperture is exposed to particular stresses due to the differences in pressure between the surroundings of the aircraft and the aircraft interior. For example, at high altitudes a force of 55 to 65 kN/m 2 acts on an aircraft door due to the pressure ratio between the aircraft interior and the outside of the aircraft.\n\nFor this reason, a conventional aircraft door 110, as represented in FIGS. 1 a and 1 b, has a body which comprises a multiplicity of ribs 111, 112, in order to absorb the compressive load acting on the aircraft door evenly and distribute it uniformly. Multiple doorstops 113 are furthermore provided on the two lateral edges of the aircraft door 110. These interact with corresponding doorstops 114 on the fuselage, as represented in FIG. 2. In order to bring the doorstops 113 and 114 into engagement, the door 110 is closed by swiveling it from outside into the door aperture 30, the doorstops 113 and 114 being arranged one on top of the other. The door 110 is then moved upwards or downwards, bringing each of the doorstops 113 and 114 into an overlap, so that the doorstops 113 of the door 110 can be outwardly braced against the doorstops 114 on the fuselage.",
  "cpc": [
    "B64C 1/1407",
    "B64C 1/143",
    "E05D 15/56",
    "E05Y 2201/624",
    "E05Y 2900/502"
  ],
  "ipc": [
    "B64C 1/14",
    "E05D 15/56"
  ],
  "assignees": [
    "Airbus Operations GmbH"
  ],
  "inventors": [
    "Peter Linde",
    "Matthias Hegenbart"
  ],
  "filing_date": "2019-11-26",
  "publication_date": "2022-12-06",
  "grant_date": "2022-12-06",
  "priority_date": "2018-11-30",
  "application_number": "US-201916695544-A",
  "family_id": "68943956",
  "cited_by_count": 2,
  "citations": [
    "US6638466B1",
    "US20050287383A1",
    "DE602005000111T2",
    "US7543778B2",
    "FR3071222A1",
    "US20190351641A1",
    "US20210387713A1",
    "FR3097194A1"
  ]
}