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:
Nov. 30, 2010
Filed:
Nov. 13, 2006
Richard C. Welch, Rockford, IL (US);
Gerard H. Bueche, Byron, IL (US);
William T. Degroff, Rockford, IL (US);
Jose Albero, Lachenaie, CA;
Jerzy Makuszewski, Mississauga, CA;
Richard C. Welch, Rockford, IL (US);
Gerard H. Bueche, Byron, IL (US);
William T. DeGroff, Rockford, IL (US);
Jose Albero, Lachenaie, CA;
Jerzy Makuszewski, Mississauga, CA;
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Pratt & Whitney Canada Corp., Quebec, CA;
Abstract
A turbine engine emergency power system includes low and high pressure spools, the lower pressure spool including a low pressure compressor. A turbofan is coupled to the low pressure spool. The turbofan drives the low pressure spool in a windmill condition in which the low pressure turbine fails to provide rotational drive to the turbofan. A generator is rotationally driven by the low pressure spool in the windmill condition. A gear train is used to increase the speed of the generator in one example. In one example embodiment, a centrifugal clutch is used to selectively decouple the generator from the low pressure spool at a predetermined engine speed, which corresponds to normal operating speeds when the turbine engine is under power.