# US 9,868,539 B2 · Aircraft engine pylon to wing mounting assembly

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- Number: US 9,868,539 B2
- Document ID: US9868539B2
- Status: Granted
- Kind: B2
- Application number: 14/863,989
- Filed: 2015-09-24
- Published: 2017-03-30
- Granted: 2018-01-16
- Earliest claimed: 2015-09-24
- Assignees: Embraer S.A.
- Applicants: Embraer S.A.
- Inventors: Alberto Dei Castelli; Clovis Augusto Eça Ferreira; Wanderley Montoro; Aldemiro Lorenzini Filho; Carlos Alberto Bones, Jr.; Juliano De Oliveira
- Web page: https://patentgrep.com/patent/US9868539B2

## CPC

- B64D 27/18: within, or attached to, wings
- B64D 27/402: {comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant}
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

## Abstract

Pylon mounting assemblies are provided for mounting an engine (e.g., a turbojet engine) to a wing of an aircraft. The pylon mounting assemblies include an upper pylon connection member, and a lower pylon connection box. The upper pylon connection member and the lower pylon connection box respectively define opposed lower and upper mounting surfaces which establish a mounting plane that slopes downwardly and rearwardly relative to aircraft travel direction. At least one connector assembly connects the upper pylon connection member and a lower pylon connection box to one another at the opposed respective lower and upper mounting surfaces thereof.

## Claims

### Claim 1

An aircraft wing assembly comprising an aircraft wing and a pylon mounting assembly for mounting an engine to the aircraft wing, wherein the pylon mounting assembly comprises:
an upper pylon connection member, and
a lower pylon connection box, wherein
the upper pylon connection member and the lower pylon connection box respectively define opposed lower and upper mounting surfaces which establish a mounting plane that slopes downwardly and rearwardly relative to aircraft travel direction; and
at least one connector assembly frangibly connecting the upper pylon connection member and the lower pylon connection box to one another at the opposed respective lower and upper mounting surfaces thereof so as to allow separation of the lower pylon connection box from the upper pylon connection member in response to a separatory load in excess of a nominal design load.

### Claim 2 (depends on 1)

The aircraft wing assembly as in claim 1, wherein the upper pylon connection member is a solid structure connected rigidly to a wing box of the aircraft wing.

### Claim 3 (depends on 2)

The aircraft wing assembly as in claim 2, wherein the upper pylon connection member extends forwardly of the wing box of the aircraft wing.

### Claim 4 (depends on 3)

The aircraft wing assembly as in claim 3, wherein the upper pylon connection member includes an upper surface which is an extension of an upper surface of the aircraft wing.

### Claim 5 (depends on 1)

The aircraft wing assembly as in claim 1, wherein the lower pylon connection box defines a substantially horizontal surface forwardly of the upper mounting surface thereof.

### Claim 6 (depends on 1)

The aircraft wing assembly as in claim 1, wherein the pylon mounting assembly comprises forward and aft connector assemblies.

### Claim 7 (depends on 6)

The aircraft wing assembly as in claim 6, wherein each of the forward and aft connector assemblies comprises an aligned series of opposed pairs of mounting blocks associated with the upper pylon connection member and the lower pylon connection box, and connectors interconnecting the opposed pairs of mounting blocks.

### Claim 8 (depends on 1)

The aircraft wing assembly as in claim 1, wherein the at least one connector assembly comprises an aligned series of opposed pairs of mounting blocks associated with the upper pylon connection member and the lower pylon connection box, and connectors interconnecting the opposed pairs of mounting blocks.

### Claim 9 (depends on 1)

An aircraft comprising the aircraft wing assembly as in claim 1.