# US 2020/0400098 A1 · Thrust reverser with blocker door folding linkage

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- Number: US 2020/0400098 A1
- Document ID: US20200400098A1
- Status: Published application
- Kind: A1
- Application number: 17/010,156
- Filed: 2020-09-02
- Published: 2020-12-24
- Earliest claimed: 2018-07-06
- Assignees: Rohr, Inc.
- Applicants: Rohr, Inc.
- Inventors: Timothy Gormley
- Web page: https://patentgrep.com/patent/US20200400098A1

## CPC

- F02K 1/72: the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow
- F02K 1/763: {with actuating systems or actuating devices; Arrangement of actuators for thrust reversers}
- F02K 1/625: {the aft end of the engine cowling being movable to uncover openings for the reversed flow}
- F16H 21/44: for conveying or interconverting oscillating or reciprocating motions
- F05D 2260/50: Kinematic linkage, i.e. transmission of position
- 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)
- F16H: GEARING
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

An assembly is provided for an aircraft propulsion system. This assembly includes a fixed structure, a translating structure, a blocker door and a folding linkage. The translating structure is configured to move between a stowed position and a deployed position. The blocker door is pivotally attached to the translating structure at a first pivot joint. The folding linkage links the blocker door to the fixed structure. The folding linkage includes a member pivotally attached to the blocker door at a second pivot joint that is radially outboard of a skin of the blocker door when the translating structure is in the stowed position. The second pivot joint is radially outboard of the first pivot joint when the translating structure is in the stowed position.

## Claims

### Claim 1

A method, comprising:
providing an aircraft propulsion system that comprises a fixed structure, a translating structure, a blocker door and a folding linkage, wherein the blocker door is pivotally attached to the translating structure, and the folding linkage connects the blocker door to the fixed structure;
moving the translating structure from a stowed position towards a deployed position; and
moving the blocker door relative to the translating structure, wherein the folding linkage is configured to initiate the moving of the blocker door substantially simultaneously with initiation of the moving of the translating structure.

### Claim 2 (depends on 1)

The method of claim 1, wherein the moving of the blocker door relative to the translating structure comprises pivoting the blocker door radially inwards into a bypass flowpath of the aircraft propulsion system.

### Claim 3 (depends on 2)

The method of claim 2, wherein the blocker door pivots radially inwards as soon as the translating structure begins to translate axially from the stowed position towards the deployed position.

### Claim 4 (depends on 1)

The method of claim 1, wherein
the blocker door is pivotally attached to the translating structure at a first pivot joint;
the folding linkage is pivotally attached to the blocker door at a second pivot joint; and
the second pivot joint is located radially outboard of the first pivot joint when the translating structure is in a stowed position.

### Claim 5 (depends on 1)

The method of claim 1, wherein
the folding linkage comprises a link arm and a crank arm;
the link arm links and is pivotally attached to the fixed structure and the crank arm; and
the crank arm links and is pivotally attached to the link arm and the blocker door.

### Claim 6 (depends on 5)

The method of claim 5, wherein the crank arm is configured with a roller that engages the translating structure during movement of the translating structure from the stowed position to a partially deployed position between the stowed position and the deployed position.

### Claim 7 (depends on 6)

The method of claim 6, wherein the engagement between the roller and the translating structure initiates the movement of the blocker door substantially simultaneously with the initiation of the movement of the translating structure.

### Claim 8

An assembly for an aircraft propulsion system, comprising:
a fixed structure;
a translating structure configured to translate between a stowed position and a deployed position;
a blocker door pivotally attached to the translating structure; and
a folding linkage linking the blocker door and the fixed structure, the folding linkage comprising a roller that engages the translating structure when the translating structure moves from the stowed position to an intermediate position between the stowed position and the deployed position.

### Claim 9 (depends on 8)

The assembly of claim 8, wherein the roller is configured to facilitate pivoting of the blocker door as the translating structure translates from the stowed position to the intermediate position.