Method and apparatus for pumping fuel

Details Method and apparatus for pumping fuel Method and apparatus for pumping fuel

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.

REFERENCES:
patent: 1116998 (1914-11-01), Compton
patent: 1940024 (1933-12-01), Shaff
patent: 2292896 (1942-08-01), Morgan
patent: 2443527 (1948-06-01), Wirth
patent: 2612844 (1952-10-01), Grise
patent: 2666393 (1954-01-01), Troeger
patent: 2758547 (1956-08-01), Wendell
patent: 3136849 (1967-05-01), Cooper
patent: 3184024 (1965-05-01), Aschauer
patent: 3532441 (1970-10-01), Schofield
patent: 3578880 (1971-05-01), Cygnor
patent: 3584974 (1971-06-01), Nicastro
patent: 3635602 (1972-01-01), Grennan et al.
patent: 3784329 (1974-01-01), Crawley

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