Patent ID: 9518513
Filing Date: 2016-12-13
CPC Classification: F01D,F02C,F04D,F05D

Claim Text:
1. A gas turbine engine variable bleed apparatus comprising: a variable bleed valve including a single variable bleed valve door disposed in a bleed inlet in a transition duct, the single variable bleed valve door pivotable or rotatable about two or more separate pivot points, the variable bleed valve operable to open and close an aft bleed slot extending generally radially outwardly from the transition duct and extending between an aft lip located at a downstream or aft end of the single variable bleed valve door and the transition duct, and the variable bleed valve operable to open and close a forward bleed slot extending generally radially inwardly into the transition duct and extending between a forward lip located at an upstream or forward end of the single variable bleed valve door and the transition duct, and further comprising the variables bleed valve operable to transition the single variable bleed valve door between a first position with the aft bleed slot being open and the forward bleed slot being closed to a second position with the aft bleed slot being closed and the forward bleed slot being open without fully closing the single variable bleed valve door.