Rotary kinetic fluid motors or pumps – Axially opposed working fluid paths to or from runner – Pump impeller means
Patent
1987-03-16
1988-05-03
Schwartz, L. I.
Rotary kinetic fluid motors or pumps
Axially opposed working fluid paths to or from runner
Pump impeller means
415 99, 415102, F01D 302
Patent
active
047416645
ABSTRACT:
An axial flow liquid pump comprises an outer tube, an inner tube positioned within the outer tube, and a driven shaft journaled within the inner tube. An impeller is secured near to the lower end of the shaft. A conduit delivers liquid to be pumped from the exterior of the outer tube to the lower end of the inner tube. The conduit is sized for permitting liquid to be drawn into said impeller such that the pressure in the vicinity of the lower end of the inner tube is equal or less than the pressure at the exterior of the outer tube near the conduit intake but sufficient not to draw air down through the inner tube.
REFERENCES:
patent: 513901 (1894-01-01), Eisler
patent: 950398 (1910-02-01), Menge
patent: 2971468 (1961-02-01), McDoniel
patent: 3767321 (1973-10-01), Layne
patent: 4627790 (1986-12-01), Bowes et al.
Bowes H. David
Olmstead Ronald F.
Schwartz L. I.
Thompson-Chemtrex, Inc.
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