The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 2012
Filed:
Aug. 03, 2007
John Erik Hershey, Ballston Lake, NY (US);
Brock Estel Osborn, Niskayuna, NY (US);
Donald Lee Gardner, West Chester, OH (US);
Rafael Jose Ruiz, Liberty Township, OH (US);
William Lee Herron, Springdale, OH (US);
John Erik Hershey, Ballston Lake, NY (US);
Brock Estel Osborn, Niskayuna, NY (US);
Donald Lee Gardner, West Chester, OH (US);
Rafael Jose Ruiz, Liberty Township, OH (US);
William Lee Herron, Springdale, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A method and system adjusts blade tip clearance between rotating aircraft gas turbine engine blade tips and a surrounding shroud in anticipation of and before an engine command that changes an engine rotational speed. The method may include determining when to begin adjusting the tip clearance by expanding or contracting the shroud before the engine command and may be based on monitored aircraft and/or aircraft crew data indicative of the engine. The aircraft and/or aircraft crew data may include communications between aircraft crew and air traffic control authorities or air traffic control surrogates. Determining when to begin adjusting the tip clearance may include using learning algorithms which may use the aircraft gas turbine engine's operating experience and/or operating experience of other jet engines on an aircraft containing the aircraft gas turbine engine and/or on other aircraft.