Drainage pump

Details Drainage pump Drainage pump

1991-10-17

1993-10-12

Kwon, John T.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Responsive to liquid level or weight

415115, 415116, 417 36, 417 90, F04B 1100

Patent

active

052520250

ABSTRACT:
A drainage pump (10) in which the portion near the entrance of the impeller (12) in the suction tube (11) is open to the set lowest suction water level (L.W.L.) through an air intake pipe (15), so that air is introduced into the portion near the entrance of the impeller (12) when the suction water level (W.L.) is lower than the preset lowest suction water level. An air intake hole (14) may also be provided through the water intake suction tube (11) near the impeller.

REFERENCES:
patent: 1047134 (1912-12-01), Oesterlen
patent: 1474086 (1923-11-01), Poebing
patent: 2262191 (1941-11-01), Moody
patent: 5074746 (1991-12-01), Konishi

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