Power plants – Combustion products used as motive fluid – With safety device
Reexamination Certificate
2006-11-13
2010-11-30
Cuff, Michael (Department: 3741)
Power plants
Combustion products used as motive fluid
With safety device
C060S226100, C060S262000, C060S792000, C060S802000, C060S772000
Reexamination Certificate
active
07841163
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.
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UK Search Report for Application No. GB0722280.5, Mar. 2, 2008.
Albero Jose
Bueche Gerard H.
DeGroff William T.
Makuszewski Jerzy
Welch Richard C.
Carlson Gaskey & Olds P.C.
Cuff Michael
Hamilton Sundstrand Corporation
Kim Craig
Pratt & Whitney Canada Corp.
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