# US 12,600,485 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 12,600,485 B2
- Document ID: US12600485B2
- Status: Granted
- Kind: B2
- Application number: 18/740,961
- 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/US12600485B2

## 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 central casing and a lower end of the front wall, and a complementary front engine attachment fixed between an upper area of the fan casing and a front end of the upper spar.

## 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 central casing and a lower end of the front wall, and
a complementary front engine attachment fixed between an upper area of the fan casing and a front end of the upper spar,
wherein the 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,
wherein the complementary front engine attachment comprises a plate assembly mounted in a third articulated manner on the front end of the upper spar at the vertical median plane and on opposite sides of the vertical median plane, the plate assembly comprises a first end mounted in a fourth articulated manner on the upper area of the fan casing, the third articulated manner and the fourth 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 each fitting assembly comprises at the vertical median plane, a waiting fail safe articulation with the upper area of the central casing.

### Claim 4 (depends on 1)

The propulsion assembly according to claim 1, wherein each fitting assembly comprises two plates fixed together.

### Claim 5 (depends on 1)

The propulsion assembly according to claim 1, wherein the complementary front engine attachment comprises a lever movably mounted on the front end of upper spar at the vertical median plane and first and second ends of the lever are movably mounted to the upper area of the fan casing on opposite sides of the vertical median plane, the lever movably mounted at the vertical median plane and the first and second ends movably mounted on opposite sides of the vertical median plane each providing at least a rotation around an axis parallel to the longitudinal axis.

### Claim 6 (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.