Secondary pump feed apparatus

Details Secondary pump feed apparatus Secondary pump feed apparatus

1977-09-22

1979-04-03

Freeh, William L.

Pumps

Expansible chamber type

Relatively movable serial distributors

417503, F04B 2102

Patent

active

041474783

ABSTRACT:
Apparatus for connecting to a pump inlet where a first inlet feedpipe is attached including a second inlet feedpipe tap having a one-way check valve, and a resilient orifice member in the first inlet feedpipe upstream of the tap, whereby the orifice size is less than the inlet feedpipe size so as to provide a flow restriction for periodically creating negative pressure in the region of the tap, to draw liquid from the second inlet feedpipe into the first inlet feedpipe.

REFERENCES:
patent: 1277383 (1918-09-01), Cherry
patent: 2266125 (1941-12-01), Malsbary
patent: 2604854 (1952-07-01), Taylor
patent: 2632476 (1953-03-01), Miller
patent: 2819678 (1958-01-01), Nordell
patent: 2971470 (1961-02-01), Wein et al.
patent: 3042981 (1962-07-01), Dilone
patent: 3205830 (1965-09-01), Clack
patent: 3601510 (1971-08-01), Sadler

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