Patent ID: 9316108
Filing Date: 2016-04-19
CPC Classification: F01D

Claim Text:
1. A gas turbine engine frame, comprising: a generally annular outer casing disposed substantially coaxially about a centerline axis, the outer casing comprising an outer surface facing radially outward away from the centerline axis and an inner surface facing radially inward toward the centerline axis; a hub disposed within the outer casing and spaced radially inward from the inner surface of the outer casing, the hub being arranged substantially coaxially about the centerline axis; a plurality of circumferentially spaced apart struts fixedly joined to the hub and the outer casing, individual struts extending generally radially outwardly from the hub to the outer casing; and a stiffening rail monolithically formed with the outer casing circumferentially between two of the struts, the stiffening rail having wherein the depth of the stiffening rail increases from a minimum approximate the first strut to a maximum substantially midway between the first strut and the second strut, and wherein the height of the stiffening rail decreases from a maximum approximate the first strut to a minimum substantially midway between the first strut and the second strut.