# US 8,740,150 B2 · Connection of a wing to a fuselage of an airplane > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,740,150 B2 - Document ID: US8740150B2 - Status: Granted - Kind: B2 - Application number: 13/058,552 - Filed: 2009-08-18 - Published: 2011-09-01 - Granted: 2014-06-03 - Earliest claimed: 2008-08-18 - Assignees: Airbus Operations GmbH - Applicants: Frank Werth; Andreas Poppe; Hermann Benthien; Bernd Beschorner - Inventors: Frank Werth; Andreas Poppe; Hermann Benthien; Bernd Beschorner - Web page: https://patentgrep.com/patent/US8740150B2 ## CPC - B64C 1/26: Attaching the wing or tail units or stabilising surfaces - B64C: AEROPLANES; HELICOPTERS ## Abstract An aerofoil connection on a fuselage airframe comprising a plurality of double-jointed coupling members. In each case at least two z-coupling members extending substantially parallel to a vertical axis of the aircraft and in each case at least two xz-coupling members are arranged in the region of two longitudinal edges of a fuselage airframe recess wherein the xz-coupling members are configured in each case for a first maximum of a load in the event of a crash and of a load in normal flight operation parallel to a longitudinal axis of the aircraft, and for a second maximum of a load in the event of a crash and of a load in normal flight operation parallel to the vertical axis. The xz-coupling members are capable of absorbing force components parallel to the x-axis as well as force components which arise parallel to the z-axis. ## Claims ### Claim 1 A connection of an aerofoil to a fuselage airframe of an aircraft comprising a plurality of coupling members, in each case at least two z-coupling members which extend substantially parallel to a vertical axis of the aircraft and in each case at least two xz-coupling members being arranged in a region of two longitudinal edges of a fuselage airframe recess, wherein the spaces between the xz-coupling members and the z-coupling members are different and the xz-coupling members each comprising an xz-fuselage airframe bearing arranged on the fuselage airframe and an xz-aerofoil bearing attached to the aerofoil which are articulated to one another by two xz-straps which are inclined with respect to a longitudinal axis of the aircraft, wherein both longitudinal axes of the two xz-straps extend in an opposite inclination and with inclinations of different sizes with respect to a horizontal to compensate differing force effects, wherein the xz-straps of at least one xz-coupling member are configured such that, in the event of a crash, an energy-absorbing compression of the xz-straps occurs, as a result of which a side face of the xz-fuselage airframe bearing and a side face of the xz-aerofoil bearing are brought into direct mechanical contact, wherein the side faces are each provided with teeth which, in the event of a crash, mesh at least in a plurality of teeth, and wherein the xz-straps of the xz-coupling member comprise at least one of an elongate oval shape, a statically light configuration or have at least one weakened zone to allow a defined deformation of the xz-strap in the event of the aircraft crashing, so that impact energy is transferred by the xz-coupling member. ### Claim 2 (depends on 1) The connection according to claim 1, wherein a superficial shape of the side faces of the xz-fuselage airframe bearing and of the xz-aerofoil bearing are configured to be complementary to one another. ### Claim 3 (depends on 1) The connection according to claim 1, wherein in the region of the longitudinal edges at least two y-coupling members are arranged substantially parallel to a transverse axis of the aircraft. ### Claim 4 (depends on 1) The connection according to claim 1, wherein the at least two xz-straps are in an opposite and inclined arrangement with respect to a longitudinal axis of the aircraft in the region of a longitudinal edge. ### Claim 5 (depends on 1) The connection according to claim 1, wherein each xz-strap has two holes for two bolts. ### Claim 6 (depends on 1) The connection according to claim 1, wherein the z-coupling members each comprise a z-fuselage airframe bearing arranged on the fuselage airframe and a z-aerofoil bearing attached to the aerofoil. ### Claim 7 (depends on 3) The connection according to claim 3, wherein the y-coupling members each comprise a y-fuselage airframe bearing arranged on the fuselage airframe and a y-aerofoil bearing attached to the aerofoil which are articulated to one another by two y-straps with two holes and two bolts. ### Claim 8 (depends on 1) The connection according to claim 1, wherein longitudinal axes of two xz-straps intersect one another in the region of a longitudinal edge. ### Claim 9 (depends on 1) The connection according to claim 1, wherein the coupling members are preferably formed using at least one of titanium alloy or titanium. ### Claim 10 (depends on 1) The connection according to claim 1, wherein the two xz-straps have at least one weakened zone to allow a defined deformation of the xz-strap in the event of the aircraft crashing. ### Claim 11 (depends on 1) The connection according to claim 1, wherein the connection is a connection of a high-wing aircraft.