# US 8,464,512 B2 · Actuator for an aircraft nacelle mobile structure, and nacelle comprising at least one such actuator

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- Number: US 8,464,512 B2
- Document ID: US8464512B2
- Status: Granted
- Kind: B2
- Application number: 12/682,139
- Filed: 2008-09-12
- Published: 2010-09-02
- Granted: 2013-06-18
- Earliest claimed: 2007-10-08
- Assignees: Aircella
- Applicants: Guy Vauchel; Jean-Philippe Joret; Pierre Baudu; Christophe Guenadou
- Inventors: Guy Vauchel; Jean-Philippe Joret; Pierre Baudu; Christophe Guenadou
- Web page: https://patentgrep.com/patent/US8464512B2

## CPC

- F02K 1/763: {with actuating systems or actuating devices; Arrangement of actuators for thrust reversers}
- B64D 29/06: Attaching of nacelles, fairings or cowlings
- F16H 25/20: Screw mechanisms (with automatic reversal F16H25/12)
- F16H 2025/2037: {Actuator supports or means for fixing piston end, e.g. flanges}
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- F16H: GEARING

## Abstract

This actuator for an aircraft engine nacelle mobile structure (9) comprises a motor (1) intended to be mounted on a fixed part of the said nacelle, an endless screw (21) able to be turned by this motor (1), a slideway (5) intended to be connected to the said mobile structure (9) and comprising a nut (29) in mesh with the said endless screw, and a first ball end (15) allowing an angular offset between the axis of the said endless screw (21) and the said slideway (5). This actuator is notable in that it comprises a sleeve (19) able to accommodate the said screw (21) and extending with clearance inside the said slideway (5), the said nut (29) being mounted on that end of the said sleeve (19) that is closest to the said motor (1), and the said first ball end being interposed between the other end of the said sleeve (19) and the said slideway (5).

## Claims

### Claim 1

An actuator for an aircraft engine nacelle mobile structure, comprising:
a motor intended to be mounted on a fixed part of said nacelle,
an endless screw able to be turned by this motor,
a slide intended to be connected to said mobile structure,
a nut in mesh with said endless screw,
a first ball joint allowing some angular offset between the axis of said endless screw and said slide, and
a sleeve able to accept said screw and extending with clearance inside said slide,
wherein said nut being mounted on the end of said sleeve closest to said motor, and said first ball joint being interposed between the other end of said sleeve and said slide.

### Claim 2 (depends on 1)

The actuator as claimed in claim 1, wherein said first ball joint is interposed between said other end of the sleeve and a foot end (11) itself mounted inside said slide (5).

### Claim 3 (depends on 2)

The actuator as claimed in claim 2, wherein said foot end is connected to said sleeve by at least one removable key.

### Claim 4 (depends on 2)

The actuator as claimed in claim 2, wherein said first ball joint is connected to said foot end by a removable pin.

### Claim 5 (depends on 1)

The actuator as claimed in claim 1, further comprising a second ball joint interposed between said motor and said endless screw.

### Claim 6 (depends on 5)

The actuator as claimed in claim 5, wherein said second ball joint is connected to said motor by a removable connecting member such as a pin.

### Claim 7 (depends on 1)

An aircraft engine nacelle comprising a fixed part and at least one structure mounted movably on the fixed part, comprising at least one actuator as claimed in claim 1, interposed between said fixed part and said mobile structure.

### Claim 8 (depends on 7)

The nacelle as claimed in claim 7, wherein said mobile structure is a mobile cowl of a cascade-type thrust reverser.

### Claim 9 (depends on 7)

The nacelle as claimed in claim 7, wherein said mobile structure is a door of a door-type thrust reverser.