# US 2019/0168857 A1 · System for the automatic unlocking of a door of an aircraft

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- Number: US 2019/0168857 A1
- Document ID: US20190168857A1
- Status: Published application
- Kind: A1
- Application number: 16/201,032
- Filed: 2018-11-27
- Published: 2019-06-06
- Earliest claimed: 2017-11-28
- Assignees: Airbus Operations GmbH
- Applicants: Airbus Operations GmbH
- Inventors: Ronald RISCH
- Web page: https://patentgrep.com/patent/US20190168857A1

## CPC

- B64C 1/1423: {Passenger doors}
- E05B 77/12: Automatic locking or unlocking at the moment of collision
- B64D 25/00: Emergency apparatus or devices, not otherwise provided for
- E05Y 2900/502: for aircraft or spacecraft
- E05Y 2900/531: Doors
- B64C: AEROPLANES; HELICOPTERS
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- 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 system for automatic unlocking of a door of an aircraft in the event of impact of the aircraft includes a door opening, a door articulated on the aircraft in the door opening, and a locking arrangement designed to lock the door to the aircraft when the door is in a closed, use state. The locking arrangement has a load-transmission device which is designed, and coupled to an impact region of the aircraft, such that, in the event of impact of the aircraft in the impact region, the load-transmission device transmits a deformation load, caused by inward deformation of the impact region, to the locking arrangement and thus unlocks the door.

## Claims

### Claim 1

A system for automatic unlocking of a door of an aircraft in an event of impact of the aircraft, the system comprising:
a door opening;
a door configured to be articulated on the aircraft in the door opening; and
a locking arrangement configured to lock the door to the aircraft when the door is in a closed, use state, the locking arrangement comprising a load-transmission device coupled to an impact region of the aircraft, and configured such that, in the event of impact of the aircraft in the impact region, the load-transmission device transmits a deformation load, caused by inward deformation of the impact region, to the locking arrangement and thus unlocks the door.

### Claim 2 (depends on 1)

The system according to claim 1, wherein the load-transmission device is configured to transmit the deformation load at least one of: mechanically, electrically, hydraulically and pneumatically.

### Claim 3 (depends on 1)

The system according to claim 1, wherein the load-transmission device comprises a load-transmission element configured at least as one of: a lever, a linkage and a cylinder.

### Claim 4 (depends on 1)

The system according to claim 1, wherein, in order to transmit the deformation load, the load-transmission device is configured to perform at least one of: a translatory movement and a rotary movement.

### Claim 5 (depends on 1)

The system according to claim 1, wherein the impact region is adjacent to the door opening.

### Claim 6 (depends on 1)

The system according to claim 1, wherein the door opening is in a fuselage of the aircraft.

### Claim 7 (depends on 1)

The system according to claim 1, wherein the impact region is a base region of a fuselage of the aircraft.

### Claim 8 (depends on 1)

The system according to claim 1, wherein the impact region is in a wing region of the aircraft.

### Claim 9 (depends on 1)

The system according to claim 1, wherein the locking arrangement comprises an unlocking safeguard configured to perform at least one of: blocking and enabling unlocking of the door by the load-transmission device.

### Claim 10 (depends on 9)

The system according to claim 9, wherein the unlocking safeguard is configured for manual actuation.

### Claim 11

An aircraft having a system for automatic unlocking of a door of an aircraft in an event of impact of the aircraft, the system comprising:
a door opening;
a door configured to be articulated on the aircraft in the door opening; and
a locking arrangement configured to lock the door to the aircraft when the door is in a closed, use state, the locking arrangement comprising a load-transmission device coupled to an impact region of the aircraft, and configured such that, in the event of impact of the aircraft in the impact region, the load-transmission device transmits a deformation load, caused by inward deformation of the impact region, to the locking arrangement and thus unlocks the door.

### Claim 12 (depends on 11)

The aircraft according to claim 11, wherein the aircraft comprises at least one upper passenger deck and a lower passenger deck beneath the at least one upper passenger deck, wherein the door opening is in the aircraft in a direction of the lower passenger deck.