Granted Patent B1

US 12,747,668 · App. 19/293,010 · Granted Sep 29, 2026

Inventors: Antonio Giuseppe D'Ettole (Rivoli, IT); Gianmaria Sartor (San Martino di Lupari, IT); Veronica Iannotti (Turin, IT); Emanuele Rosso (Grugliasco, IT)

Assignee: GE Avio S.R.L.

F01D5/26F01D5/16F01D25/06F05D2240/30F05D2260/96

Abstract

Claims (29)

1 . A damper assembly for a blade, the damper assembly defining a longitudinal direction, a lateral direction, and a vertical direction, the damper assembly comprising:

a base extending in the longitudinal direction from a first end to a second end, the base including a forward face, a rear face, and a top face, wherein the top face defines a non-zero angle with the forward face and the forward face is parallel to the rear face;

a first contact surface defined on the top face between the first end and the second end, the first contact surface defining a first curved surface, wherein the first curved surface is oriented outward relative the front face; and

a second contact surface defined on the rear face between the first end and the second end, the second contact surface defining a second curved surface, wherein the second curved surface is oriented outward relative the rear face, and

wherein the first curved surface abuts the second curved surface at a common position in the longitudinal direction.

2 . The damper assembly of claim 1 , wherein the base includes a flat region extending from the first end to the first contact surface.

3 . The damper assembly of claim 1 , further comprising a third contact surface defined on the top face between the first contact surface and the second end, the third contact surface defining a third curved surface.

4 . The damper assembly of claim 3 , wherein the base includes a flat region extending from the first end to the first contact surface, and wherein the base includes a second flat region extending from the second end to the third contact surface.

5 . The damper assembly of claim 4 , further comprising a fourth contact surface defined on the rear face, the fourth contact surface defining a fourth curved surface, wherein the top face of the second flat region is shorter in the vertical direction than the third curved surface and the top face of the second flat region is shorter in the lateral direction than the fourth curved surface.

6 . The damper assembly of claim 4 , wherein the base includes a third flat region extending between the first contact surface and the second contact surface.

7 . The damper assembly of claim 3 , further comprising an intermediate region extending along the top face and the rear face from the first contact surface to the third contact surface.

8 . The damper assembly of claim 1 , wherein the first curved surface and the second curved surface abut each other at a seam.

9 . The damper assembly of claim 1 , wherein the top face defines a nonzero obtuse angle with the forward face.

10 . The damper assembly of claim 1 , wherein the forward face is parallel to the rear face.

11 . The damper assembly of claim 1 , further comprising a third contact surface defined on the rear face between the second contact surface and the second end, the third contact surface defining a third curved surface.

12 . The damper assembly of claim 1 , wherein the first curved surface defines a length in the longitudinal direction and a radius of curvature, and a ratio of the length to the radius of curvature is in a range from 0.45 to 1.20.

13 . The damper assembly of claim 12 , wherein the second curved surface defines a second length in the longitudinal direction and a second radius of curvature, and the ratio of the second length to the second radius of curvature is in a range from 0.45 to 1.20.

14 . The damper assembly of claim 13 , wherein the ratio of the second length to the second radius of curvature is in a range from 0.45 to 1.00.

15 . A damper assembly for a blade, the damper assembly defining a longitudinal direction, a lateral direction, and a vertical direction, the damper assembly comprising:

a base extending in the longitudinal direction from a first end to a second end, the base including a forward face, a rear face, and a top face, wherein the top face defines a non-zero angle with the forward face and the forward face is parallel to the rear face;

a first contact surface defined on the top face between the first end and the second end, the first contact surface defining a first curved surface convex from the top face, wherein the first curved surface is oriented outward relative the front face; and

a second contact surface defined on the rear face between the first end and the second end, the second contact surface defining a second curved surface convex from the rear face, wherein the second curved surface is oriented outward relative the rear face,

wherein the base includes a flat region extending from the second end to the second contact surface, and

wherein the flat region is shorter in the vertical direction than the first curved surface.

16 . The damper assembly of claim 15 , wherein the first curved surface and the second curved surface meet at a seam, wherein the flat region defines a corner, and the corner is shorter in the vertical direction than the seam.

17 . The damper assembly of claim 15 , further comprising a third contact surface defined on the top face between the first contact surface and the first end, the third contact surface defining a third curved surface convex from the top face.

18 . The damper assembly of claim 17 , further comprising a second flat region extending from the first contact surface to the third contact surface.

19 . The damper assembly of claim 15 , wherein the flat region defines a curved edge at the second end.

20 . The damper assembly of claim 15 , wherein the flat region extends from the top face to the rear face.

Priority Claims (1)

References Cited (26)