# US 10,502,161 B2 · Cascade system and apparatus

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- Number: US 10,502,161 B2
- Document ID: US10502161B2
- Status: Granted
- Kind: B2
- Application number: 14/954,570
- Filed: 2015-11-30
- Published: 2016-05-26
- Granted: 2019-12-10
- Earliest claimed: 2014-04-11
- Assignees: Rohr, Inc.
- Applicants: Rohr, Inc.
- Inventors: Sara C. Crawford
- Web page: https://patentgrep.com/patent/US10502161B2

## 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 1/64: Reversing fan flow
- F02K 1/70: using thrust reverser flaps or doors mounted on the fan housing
- F05D 2250/37: circumferential
- 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)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A thrust reverser system may comprise a cascade radially positioned about a centerline of an engine or a nacelle centerline. Various cascade features may be positioned at a constant radius from the centerline while other features vary according to station and/or circumferential position.

## Claims

### Claim 1

A thrust reverser system formed around an engine centerline, comprising:
a torque box;
an aft cascade ring disposed aft of the torque box;
a cascade having a first vane set and a second vane set,
the first vane set having a fore end connected to the torque box, an aft end disposed aft of the fore end at an axial position and a radial position with respect to the engine centerline, and a first axial length extending between the fore end and the aft end of the first vane set, the first vane set positioned at a constant radius from the engine centerline along the first axial length and
the second vane set having an aft end connected to the aft cascade ring, a fore end disposed at the axial position and the radial position of the aft end of the first vane set, and a second axial length extending between the fore end and the aft end of the second vane set, the second vane set positioned at a variable radius, from the engine centerline to a radially inward side of the second vane set, along the second axial length and varies about a circumferential position relative to the engine centerline, the variable radius decreasing in value from the fore end of the second vane set to the aft end of the second vane set.

### Claim 2 (depends on 1)

The thrust reverser system of claim 1, further comprising a translating sleeve comprising a non-uniform annularly shaped pocket, wherein the cascade is receivable within the non-uniform annularly shaped pocket in response to the translating sleeve assuming a stowed position.

### Claim 3 (depends on 1)

The thrust reverser system of claim 1, wherein the torque box has a substantially constant radius relative to the engine centerline.

### Claim 4 (depends on 1)

The thrust reverser system of claim 1, wherein the aft cascade ring has a variable radius relative to the engine centerline.