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:
Jan. 20, 2015
Filed:
Dec. 09, 2011
James W. Norris, Lebanon, CT (US);
Daniel B. Kupratis, Wallingford, CT (US);
Gary M. Stetson, Tolland, CT (US);
James W. Norris, Lebanon, CT (US);
Daniel B. Kupratis, Wallingford, CT (US);
Gary M. Stetson, Tolland, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A gas turbine engine has a variable overall pressure rate ('OPR'). The engine includes a high pressure compressor having at least a primary stage having a set of primary rotors and a secondary stage having a set of secondary rotors. A clutch is provided to selectively engage the secondary rotors with the primary rotors. Engagement of the clutch may be controlled based on the vehicle travel mode, such as disengaging during a takeoff mode to reduce turbine entry temperature and engaging during a loiter mode to increase OPR.