# US 11,111,794 B2 · Feather seals with leakage metering

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- Number: US 11,111,794 B2
- Document ID: US11111794B2
- Status: Granted
- Kind: B2
- Application number: 16/267,799
- Filed: 2019-02-05
- Published: 2020-08-06
- Granted: 2021-09-07
- Earliest claimed: 2019-02-05
- Assignees: United Technologies Corporation
- Applicants: United Technologies Corporation
- Inventors: David Bitzko; Shawn M. McMahon; Alex J. Schneider
- Web page: https://patentgrep.com/patent/US11111794B2

## CPC

- F01D 5/187: {Convection cooling}
- F01D 11/006: {Sealing the gap between rotor blades or blades and rotor}
- F01D 9/065: {Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26)}
- F01D 11/06: Control thereof
- F01D 25/08: Cooling (of machines or engines in general F01P); Heating; Heat-insulation (of blade-carrying members, of blades F01D5/00)
- F05D 2230/54: by sheet metal manufacturing
- F05D 2240/12: Fluid guiding means, e.g. vanes
- F05D 2240/57: Leaf seals
- F05D 2250/191: perforated
- F05D 2250/29: machined; miscellaneous
- F05D 2250/294: grooved
- F05D 2250/313: the axes being perpendicular to each other
- F05D 2250/75: given by its similarity to a letter, e.g. T-shaped
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A seal assembly includes a first feather seal with a first cooling hole extending through the first feather seal. The seal assembly also includes a second feather seal adjacent to the first feather seal. The second feather seal includes a second cooling hole extending through the second feather seal. The first cooling hole is positioned over at least a portion of the second cooling hole.

## Claims

### Claim 1

A seal assembly for a gas turbine engine comprises: a first feather seal comprising a first cooling hole extending through the first feather seal: and a second feather seal adjacent to the first feather seal, wherein the second feather seal comprises a second cooling hole extending through the second feather seal, a third cooling hole extending through the second feather seal, and a fourth cooling hole extending through the second feather seal, wherein the first cooling hole extends over at least a portion of the second, third, and fourth cooling holes, and wherein a perimeter of the first cooling hole is larger than a perimeter of each of the second, third, and fourth cooling holes.

### Claim 2 (depends on 1)

The assembly of claim 1, wherein the first cooling hole is an elongated slot.

### Claim 3 (depends on 2)

The assembly of claim 2, wherein the second, third, and fourth cooling holes are each an elongated slot that is non-parallel with the first cooling hole.

### Claim 4 (depends on 2)

The assembly of claim 2, wherein the second cooling hole is a circular hole.

### Claim 5 (depends on 1)

The assembly of claim 1, wherein the first cooling hole is a circular hole and the second cooling hole, the third cooling hole, and the fourth cooling hole are each a circular hole with a smaller diameter than the first cooling hole.

### Claim 6 (depends on 2)

The assembly of claim 2, wherein the second cooling hole, the third cooling hole, and the fourth cooling hole are each a circular hole.