# US 10,502,091 B2 · Sync ring assembly and associated clevis including a rib

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- Number: US 10,502,091 B2
- Document ID: US10502091B2
- Status: Granted
- Kind: B2
- Application number: 15/375,810
- Filed: 2016-12-12
- Published: 2018-06-14
- Granted: 2019-12-10
- Earliest claimed: 2016-12-12
- Assignees: United Technologies Corporation
- Applicants: United Technologies Corporation
- Inventors: James F. McGuire, II; Venkata Reddy Chimalamarri; Seetharama Reddy Katta Jayakumar
- Web page: https://patentgrep.com/patent/US10502091B2

## CPC

- F01D 25/04: Antivibration arrangements
- F01D 17/16: by means of nozzle vanes
- F01D 17/162: {for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line (F01D17/167 takes precedence)}
- F01D 25/243: {Flange connections; Bolting arrangements (F01D25/265 takes precedence)}
- F04D 29/522: {especially adapted for elastic fluid pumps}
- F04D 29/563: {specially adapted for elastic fluid pumps}
- F05D 2220/32: in gas turbines
- F05D 2260/50: Kinematic linkage, i.e. transmission of position
- F05D 2260/79: Bearing, support or actuation arrangements therefor
- F05D 2260/96: Preventing, counteracting or reducing vibration or noise
- F05D 2300/133: Titanium
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Aspects of the disclosure are directed to a sync ring assembly associated with an engine, comprising: a sync ring, and a clevis coupled to the sync ring, where the clevis includes a rib that resists a deflection of the sync ring assembly when the engine is operated, and where the clevis is made of titanium.

## Claims

### Claim 1

A sync ring assembly for a gas turbine engine, comprising:
a sync ring disposed about an axis, the sync ring having an outer circumferential surface; and
a clevis having a first axial side, a second axial side opposite the first axial side, and an inner circumferential surface extending between the first axial side and the second axial side, the inner circumferential surface of the clevis coupled to outer circumferential surface of the sync ring, the clevis comprising a first plurality of projections at a first circumferential end of the clevis and a second plurality of projections at a second circumferential end of the clevis, opposite the first circumferential end, each projection of the first plurality of projections and the second plurality of projections circumferentially spaced apart from each other projection, the first plurality of projections and the second plurality of projections projecting outward from the inner circumferential surface of the clevis and defining a plurality of stand-offs,
wherein the clevis includes a rib disposed along at least a portion of the first axial side of the clevis and extending outward from the inner circumferential surface of the clevis and wherein the rib extends circumferentially between and contacts a first projection of the first plurality of projections and a second projection of the second plurality of projections, and
wherein the first plurality of projections couples the clevis to the sync ring.

### Claim 2 (depends on 1)

The sync ring assembly of claim 1, wherein the clevis includes a second rib.

### Claim 3 (depends on 2)

The sync ring assembly of claim 2, wherein the second rib is located on the outer circumferential surface of the clevis.

### Claim 4 (depends on 1)

The sync ring assembly of claim 1, wherein at least one stand-off of the plurality of stand-offs includes a radially extending hole configured to seat a fastener for coupling the clevis to the sync ring.

### Claim 5 (depends on 1)

The sync ring assembly of claim 1, further comprising:
a second clevis coupled to the sync ring.

### Claim 6 (depends on 5)

The sync ring assembly of claim 5, further comprising:
a second sync ring coupled to the clevis and the second clevis.

### Claim 7 (depends on 5)

The sync ring assembly of claim 5, wherein the second clevis includes a second rib.

### Claim 8 (depends on 1)

The sync ring assembly of claim 1, wherein the rib is circumferentially spaced from the first circumferential end and the second circumferential end of the clevis.

### Claim 9 (depends on 8)

The sync ring assembly of claim 8, wherein the clevis further comprises a wall disposed along at least a portion of the first axial side of the clevis and extending outward from the inner circumferential surface of the clevis.

### Claim 10 (depends on 9)

The sync ring assembly of claim 9, wherein the wall extends along the inner circumferential surface of the clevis between the second circumferential side and the rib.

### Claim 11 (depends on 9)

The sync ring assembly of claim 9, wherein the wall is connected to each projection of the second plurality of projections.

### Claim 12 (depends on 1)

The sync ring assembly of claim 1, wherein the clevis is made of titanium.

### Claim 13 (depends on 1)

The sync ring assembly of claim 1, wherein the rib extends along the inner circumferential surface of the clevis from the first axial side a portion of a distance between the first axial side and the second axial side of the clevis.

### Claim 14 (depends on 1)

The sync ring assembly of claim 1, wherein each projection of the first plurality of projections and the second plurality of projections extends from the first axial end to the second axial end of the clevis.

### Claim 15 (depends on 1)

The sync ring assembly of claim 1, wherein the first projection of the first plurality of projections, the second projection of the second plurality of projections, and the rib define a common outer surface of the clevis.