Dipping type pump where discharging performance at a time of...

Details Dipping type pump where discharging performance at a time of... Dipping type pump where discharging performance at a time of...

2006-07-11

2006-07-11

Freay, Charles G. (Department: 3746)

Pumps

With condition responsive pumped fluid control

Pump inlet or pump chamber vented to ambient

C417S423300, C137S202000

Reexamination Certificate

active

07074014

ABSTRACT:
In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving of the motor, where a check valve for air purge which allows outflow of gas from the interior of the casing but prevents outflow of liquid therefrom is provided at an upper portion of the casing.

REFERENCES:
patent: 3662725 (1972-05-01), Dragon et al.
patent: 3741675 (1973-06-01), Porter et al.
patent: 3867071 (1975-02-01), Hartley
patent: 4684333 (1987-08-01), Hirakawa et al.
patent: 4940397 (1990-07-01), Kuhlen
patent: 5042519 (1991-08-01), Kerlin
patent: 6171080 (2001-01-01), Watanabe et al.

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