# US 2019/0169915 A1 · Method for opening/closing an aircraft electric door for a pressurized airframe and door for implementing same

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- Number: US 2019/0169915 A1
- Document ID: US20190169915A1
- Status: Published application
- Kind: A1
- Application number: 16/266,432
- Filed: 2019-02-04
- Published: 2019-06-06
- Earliest claimed: 2012-11-16
- Assignees: Latecoere
- Applicants: Latecoere
- Inventors: Cyrille BESSETTES; Damien BUCHET; Nicolas LUTZI; Renaud OTHOMENE
- Web page: https://patentgrep.com/patent/US20190169915A1

## CPC

- E05F 15/70: with automatic actuation
- B64C 1/1407: {Doors; surrounding frames}
- B64C 1/1423: {Passenger doors}
- B64C 1/1446: {Inspection hatches (for engine cowls B64D29/08)}
- E05F 11/54: for doors
- E05F 15/40: Safety devices, e.g. detection of obstructions or end positions
- E05F 15/60: using electrical actuators
- E05Y 2900/502: for aircraft or spacecraft
- E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- B64C: AEROPLANES; HELICOPTERS
- 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

The invention aims to integrate the activation of the opening/closing phases around a single electric motor, including the treatment of the external window that may be present. An airplane electric door according to the invention has a locking system provided with means for locking a safety catch and a system (200) for coordinating door movements having a single actuating electric motor (2), a cylindrical support (501) having a vertical rotation axis (Z′Z), said support (501) being intended to be rotated by the motor (2), and a fixed guide (91). The support (501) has at least one guideway (511) connected to the arm (6), this guideway (511) being at least partially helical along the vertical axis (Z′Z) of the support (501).; The fixed guide (9), which is likewise cylindrical with a vertical axis (Z′Z), possesses at least one double, vertical (91v) and horizontal (91h), camway for guiding the arm (6) successively in these two directions in a manner connected to the arm (6) in order to prevent it from lifting vertically and then to pivot it.

## Claims

### Claim at position 1

1-15. (canceled)

### Claim 16

An aircraft electric door for a pressurized airframe (1) comprising:
a locking system (S4) for locking a safety catch (43, 4a, 4b); and
a system for coordinating movements (110, 200, 300) of a door arm (6);
wherein a single electric motor (2, 21, 210) activated by a door computer (3) actuates the locking system (S4) and the systems (110, 200, 300) coordinating movements of the door arm (6);
wherein the system (110, 200, 300) for moving the door arm (6) includes a guideway (51, 511, 512) linked to the door arm (6), the guideway (51, 511, 512) being helical along a vertical axis (Z′Z) of a mobile cylindrical support (50) rotated by the electric motor (2) and a fixed guide (9, 91, 92), fitted in a cylindrical sleeve around the cylindrical support (50)
wherein the cylindrical support is a rod (23) forming a threaded rod (502), rotated by a back-geared motor (210) via a nut (633) mounted on the threaded rod (502), the threaded rod (502) forming a helical guideway (512), in which the fixed guide is constituted from a guideway sleeve (92) coaxial with the threaded rod (23) and a hinge plate (331b) coming from a fuselage fitting (330s), the sleeve (92) forming a vertical camway (92v), linked with a guiding slider (634) coming from the rod (23), and the hinge plate (331b) forming a horizontal camway (92h) linked with at least one other slider (635, 636) coming from the rod (23).

### Claim 17 (depends on 16)

The aircraft electric door for a pressurized airframe according to claim 16, wherein the threaded rod is a rod with balls (502) and the nut is a nut with balls (633).