# US 8,783,616 B2 · Loads interface, particularly a loads interface for a plug type aircraft door

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- Number: US 8,783,616 B2
- Document ID: US8783616B2
- Status: Granted
- Kind: B2
- Application number: 13/553,309
- Filed: 2012-07-19
- Published: 2013-02-07
- Granted: 2014-07-22
- Earliest claimed: 2011-08-01
- Assignees: Airbus Helicopters Deutschland GmbH
- Applicants: Tim Roser; Kamran Rah; Christian Steppich
- Inventors: Tim Roser; Kamran Rah; Christian Steppich
- Web page: https://patentgrep.com/patent/US8783616B2

## CPC

- B64C 1/1407: {Doors; surrounding frames}
- E05D 5/0207: {for attachment to vehicles (E05D5/043, E05D5/062 take precedence)}
- E05Y 2900/132: Doors
- B64C: AEROPLANES; HELICOPTERS
- E05D: HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS (pivotal connections in general F16C11/00)
- E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF

## Abstract

A loads interface (1), particularly a loads interface (1) of an aircraft door with an edge frame (13), an outer skin (15) and a beam (14). A loads transferring flange (11) is designed to transmit transverse, circumferential and/or longitudinal forces, is provided with at least three flanges (18, 19, 20) for distribution of the loads in the edge frame (13), the outer skin (15) and the beam (14).

## Claims

### Claim 1

A loads interface, particularly a loads interface of an aircraft door, comprising:
a background structure particularly a stiffened shell-like background structure, comprising a beam, an edge-frame component and a shell-like outer skin, preferably made from fiber reinforced plastics, said edge frame being adapted to and connected with said beam and said outer skin and
a loads transferring flange adapted and mounted to at least said beam,
wherein:
said loads transferring flange is designed to transmit transverse forces and bending moments resulting from transferring said transverse forces in said loads transferring flange and/or designed to transmit circumferential and/or longitudinal forces and torsional/bending moments resulting from transferring said circumferential and/or longitudinal forces in said loads transferring flange,
said loads transferring flange is provided with at least three angled flanges,
said edge frame is provided with an edge frame transfer section interacting with an edge frame flange of said three flanges of said loads transferring flange,
said beam is provided with at least one beam web transfer section interacting with at least one beam web flange of said three flanges of said loads transferring flange, and
said outer skin is provided with an outer skin transfer section interacting with an outer skin flange of said three flanges of said loads transferring flange.

### Claim 2 (depends on 1)

The loads interface according to claim 1, wherein said beam is rectangular with regard to said outer skin and said edge frame and said three flanges of said loads transferring flange are essentially rectangular to each other and each of the transfer sections are rectangular to each other.

### Claim 3 (depends on 1)

The loads interface according to claim 1, wherein said beam is inclined towards the outer skin and/or said edge frame is inclined towards the outer skin and the beam with the beam being inclined with less than 90° to the edge frame, preferably with about 45°.

### Claim 4 (depends on 1)

The loads interface according to claim 1, wherein the beam comprises two beam web transfer sections interacting with at least one angled beam web flange, preferably two beam web flanges of said loads transferring flange, said two beam web transfer sections being essentially parallel to each other.

### Claim 5 (depends on 1)

The loads interface according to claim 1, wherein the edge frame is provided with at least one passage for said at least one second flange of said loads transferring flange.

### Claim 6 (depends on 1)

The loads interface according to claim 1, wherein the beam comprises at least one single lap-shear joint in the beam web flange of said loads transferring flange.

### Claim 7 (depends on 1)

The loads interface according to claim 1, wherein the stiffness of said load transferring flange is adjustable by adjusting the respective stiffness of any of the flanges.

### Claim 8 (depends on 1)

The loads interface according to claim 1, wherein its geometry is self-adjusting during assembly.