Flushable metering pump

Details Flushable metering pump Flushable metering pump

1984-04-18

1985-08-13

Vrablik, John J.

Rotary expansible chamber devices

Combined

418206, 417440, F04C 218, F04C 1300, B05B 1502

Patent

active

045347174

ABSTRACT:
A flushable, positive displacement, gear-type metering pump assembly comprising: a pump housing with inlet and outlet chambers; cylindrical gears disposed within the pump housing adapted to rotate such that gear faces mesh and form a seal which separates inlet and outlet chambers, the gears being adapted to carry metered amounts of fluid between the gear faces and the wall of the pump housing from the inlet chamber to the outlet chamber; channel means for conveying fluid into the inlet chamber and directing the fluid against the gear faces exposed to the inlet chamber; channel means for conveying fluid from the inlet chamber to valve means; channel means for conveying fluid from the valve means to the outlet chamber; valve means adapted to be closed when the pump assembly is in a metering mode such that fluid may pass from the inlet chamber to the outlet chamber only by being carried between the gear faces and the wall of the pump housing and in an open mode when the pump is in a flushing mode such that fluid may pass from the inlet chamber to the outlet chamber not only between the gear faces and the wall of the pump housing, but also through the channel valve means above; and channel means for conveying fluid from the outlet chamber and out of said metering pump assembly.

REFERENCES:
patent: 1943491 (1934-01-01), Sieper
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patent: 2660336 (1953-11-01), Coffey et al.
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patent: 3155539 (1964-11-01), Juvinall
patent: 3219273 (1965-11-01), Killen
patent: 3330290 (1967-07-01), Porter
patent: 3403695 (1968-10-01), Hopkins
patent: 3450092 (1969-06-01), Kock
patent: 3458133 (1969-07-01), Wiggins
patent: 3477870 (1969-11-01), Boretti et al.
patent: 3672570 (1972-06-01), Scarbrough et al.
patent: 3674205 (1972-07-01), Kock
patent: 3857513 (1974-12-01), Wiggins
patent: 4400147 (1983-08-01), Springer et al.

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