Combined centrifugal and undervane-type rotary hydraulic machine

Details Combined centrifugal and undervane-type rotary hydraulic machine Combined centrifugal and undervane-type rotary hydraulic machine

1989-05-19

1993-02-02

Vrablik, John J.

Pumps

Diverse pumps

Including rotary nonexpansible chamber type

417205, 417219, 417236, F04B 108, F04B 2310, F04B 2314

Patent

active

051833921

ABSTRACT:
A rotary hydraulic machine having particular utility as a fuel pump for aircraft turbine engines that combines the desirable features of vane-type and centrifugal-type machines of similar character--i.e., high pressure positive displacement at low speed combined with improved reliability, package size and weight. This is accomplished, in accordances with a presently preferred embodiment of the invention, by providing a combined vane- and centrifugal-type pump that is configured to function as a pressure-compensated single-lobe vane pump for engine starting, and as a centrifugal pump at normal operating speed.

REFERENCES:
patent: 1128579 (1915-02-01), Brousseau
patent: 2293693 (1942-08-01), Wylie et al.
patent: 2348428 (1944-05-01), Tucker
patent: 3107628 (1963-10-01), Rynders et al.
patent: 3117528 (1964-01-01), Rosaen
patent: 4601641 (1986-07-01), Kuroyanagi et al.

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