Fluid handling – Processes – Involving pressure control
Reexamination Certificate
2005-01-21
2009-02-03
Lee, Kevin L (Department: 3753)
Fluid handling
Processes
Involving pressure control
C137S488000, C137S614210, C123S514000
Reexamination Certificate
active
07484522
ABSTRACT:
The present invention provides a relatively simple way to automatically turn on and off the fuel to a starter/generator cooling system during engine start. The present invention takes advantage of a fuel pressure rise provided by an engine fuel boost pump during the period from engine start to engine idle conditions. This pressure rise is used to stroke a shutoff valve in a fuel return to tank valve (FRTTV), which shuts off the starter generator cooling fuel flow. This shutoff occurs automatically with no other external input from, for example, an engine controller. A check valve is also included that prevents back flow through the FRTTV in the event of an engine start with no aircraft pumps running.
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EP Search Report No. 05256532.2.
Eick Chris D.
Futa, Jr. Paul W.
Laidlaw Mitchell J.
Libera Anthony C.
Purcell Donald M.
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
Lee Kevin L
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