US 11,396,884 B2Granted

Fan blade with composite cover

AssigneeRaytheon Technologies Corporation

InventorMichael A. Weisse

Life of this patent

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Abstract

A fan blade includes a metallic body, a first composite cover, and a second composite cover. The metallic body may have a first side, a second side, a plurality of first retention slots, and a plurality of second retention slots, in accordance with various embodiments. The first and second retention slots may extend from the first side to the second side of the metallic body. The first composite cover may be coupled to the first side of the metallic body and may include a plurality of first fingers that extend through the first retention slots and are coupled to the second side of the metallic body. The second composite cover may be coupled to the second side of the metallic body and may include a plurality of second fingers that extend through the second retention slots and are coupled to the first side of the metallic body.

Claims5

Dependent claims

A gas turbine engine comprising a fan section comprising a plurality of fan blades, wherein:

a fan blade of the plurality of fan blades comprises a metallic body defining a plurality of retention slots and a composite cover coupled to the metallic body via the plurality of retention slots,
the plurality of retention slots extend completely through the metallic body,
the composite cover comprises a plurality of fingers that extend through the plurality of retention slots,
a first finger of the plurality of fingers extends through a first retention slot of the plurality of retention slots from a suction side to a pressure side,
the first finger is coupled to, and engages with, the pressure side of the metallic body,
a second finger of the plurality of fingers extends through a second retention slot of the plurality of retention slots from the pressure side to the suction side, and
the second finger is coupled to, and engages with, the suction side of the metallic body.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/738,676Filed 9 Jan 2020 · continuation
Priority: 1 Aug 2016
Published: US 2020/0277964 A13 Sep 2020
Granted: 26 Jul 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification31 codes

F04D 29/325
For axial flow pumps: for axial flow fans
F01D 5/147
Form or construction: construction, i.e. structural features, e.g. of weight-saving hollow blades
F01D 5/282
Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion: selecting composite materials, e.g.…
F01D 9/041
Forming ring or sector: using blades

Family

Application15/225,448Parent of this continuation · filed 1 Aug 2016
US 2020/0277964 A1Pre-grant publication · published 3 Sep 2020
US 10,570,917 B2Parent of this continuation
US 2018/0030995 A1Published application
US 11,396,884 B2This patent

From the US filing history. Foreign family members aren’t listed.