Pumps – Diverse pumps – Including rotary nonexpansible chamber type
Patent
1973-06-25
1976-03-02
Freeh, William L.
Pumps
Diverse pumps
Including rotary nonexpansible chamber type
417203, 417205, 417223, 417252, 418 17, 418 23, F04B 2314, F04B 4900
Patent
active
039415058
ABSTRACT:
Method and apparatus for pumping fuel to jet engines and the like utilizing at least two stages, the first of which is a main stage including a centrifugal pump, together with a secondary stage including a positive displacement pump. The two pump stages are driven from a common drive means. In the new system, the positive displacement pump is used as a startup pump and the centrifugal pump is the sole pumping means employed during conditions of higher fuel demand. Speed responsive means are provided in conjunction with the positive displacement pump, which means are responsive to the speed of the centrifugal pump, the speed responsive means being used to terminate pumping action by the positive displacement upon the centrifugal pump reaching a predetermined speed.
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Mueller Milton W.
Nasvytis Pius J.
Freeh William L.
LaPointe G. P.
TRW Inc.
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