Patent ID: 8643241

Claim:
An end ring assembly for a rotor, wherein the rotor is rotatable about a central longitudinal axis, the end ring assembly comprising: a plurality of annular sheets stacked adjacent one another, wherein each of the plurality of annular sheets has: a first surface; a second surface spaced opposite the first surface; an outer edge spaced apart from the central longitudinal axis; and a central rim having an inner wall disposed between the central longitudinal axis and the outer edge; wherein each of the plurality of annular sheets defines a plurality of voids therethrough along the outer edge; wherein the first surface of each of the plurality of annular sheets defines an annular recession therein extending radially from the inner wall to the outer edge; wherein the second surface of each of the plurality of annular sheets has an annular protrusion thereon extending radially from the inner wall to the outer edge; wherein the annular recession has a first radial length and the annular protrusion has a second radial length that is substantially equal to the first radial length; and a braze material sandwiched between and joining only a first portion of the first surface of each of the plurality of annular sheets and a corresponding second portion of the second surface of a respective adjacent one of the plurality of annular sheets without joining an entirety of the first surface of each of the plurality of annular sheets and the second surface of the respective adjacent one of the plurality of annular sheets.