# US 12,600,484 B2 · Aircraft propulsion assembly having a jet engine, a pylon and means for attaching the jet engine to the pylon

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- Number: US 12,600,484 B2
- Document ID: US12600484B2
- Status: Granted
- Kind: B2
- Application number: 18/740,953
- Filed: 2024-06-12
- Published: 2024-12-19
- Granted: 2026-04-14
- Earliest claimed: 2023-06-14
- Assignees: Airbus Operations GmbH
- Applicants: Airbus Operations SAS
- Inventors: Thomas Deforet; Frédéric Journade; Mathieu Mahe; Antoine Claveyrollas; Mathieu Kaleta; Eric Renaud
- Web page: https://patentgrep.com/patent/US12600484B2

## CPC

- B64D 27/402: {comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant}
- B64D 27/18: within, or attached to, wings
- B64D 27/404: {Suspension arrangements specially adapted for supporting vertical loads}
- F02C 7/20: Mounting or supporting of plant; Accommodating heat expansion or creep
- B64D 27/406: {Suspension arrangements specially adapted for supporting thrust loads, e.g. thrust links}
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)

## Abstract

A propulsion assembly for an aircraft, the propulsion assembly having a jet engine having a fan casing and a central casing around a longitudinal axis and having a vertical median plane passing through the longitudinal axis, an attachment pylon having a rigid structure that takes the form of a box that has a front wall and an upper spar extending forwardly in respect to the front wall, a front engine attachment fixed between an upper area of the fan casing and a front end of the upper spar, and a complementary front engine attachment fixed between an upper area of the central casing and a lower end of the front wall.

## Claims

### Claim 1

A propulsion assembly for an aircraft, said propulsion assembly comprising:
a jet engine having a fan casing and a central casing around a longitudinal axis and having a vertical median plane passing through the longitudinal axis,
an attachment pylon having a rigid structure that takes a form of a box that has a front wall and an upper spar extending forwardly in respect to the front wall,
a front engine attachment fixed between an upper area of the fan casing and a front end of the upper spar, and
a complementary front engine attachment fixed between an upper area of the central casing and a lower end of the front wall,
wherein the front engine attachment comprises a plate assembly mounted in a first articulated manner on the front end of the upper spar at the vertical median plane and first and second ends of the plate assembly are mounted to the upper area of the fan casing in a second articulated manner on opposite sides of the vertical median plane, the first articulated manner and the second articulated manner each providing at least a rotation around an axis parallel to a vertical axis.

### Claim 2 (depends on 1)

The propulsion assembly according to claim 1, further comprising:
a main rod fixed between the upper spar and the front wall.

### Claim 3 (depends on 1)

The propulsion assembly according to claim 1, wherein the first articulated manner and the second articulated manner each employs is a ball joint link.

### Claim 4 (depends on 1)

The propulsion assembly according to claim 1, wherein the plate assembly comprises two plates.

### Claim 5 (depends on 4)

The propulsion assembly according to claim 4, further comprising:
a vice with a first jaw fixed to the upper area of the fan casing and a second jaw fixed to the first jaw,
wherein the two plates are installed between the two first jaw and second jaw, and
wherein the upper spar is installed between the two plates.

### Claim 6 (depends on 1)

The propulsion assembly according to claim 1, wherein the complementary front engine attachment comprises on each side of the vertical median plane, a pair of first rods,
wherein a first end of each first rod is mounted in a third articulated manner on the lower end of the front wall, and
wherein a second end of each first rod is mounted in a fourth articulated manner on the upper area of the central casing.

### Claim 7 (depends on 1)

The propulsion assembly according to claim 1, wherein the complementary front engine attachment comprises two fitting assemblies, each one comprising, at the vertical median plane, a first articulation point with the lower end of the front wall, and on opposite sides of the vertical median plane, a second articulation point with the upper area of the central casing.

### Claim 8 (depends on 1)

An aircraft comprising:
a wing, and
the propulsion assembly according to claim 1, wherein the rigid structure is fastened beneath the wing.