Through flow sump pump

Details Through flow sump pump Through flow sump pump

1982-04-15

1984-07-24

Freeh, William L.

Pumps

Motor driven

Electric or magnetic motor

415121G, F04B 3504, F04B 3900

Patent

active

044616147

ABSTRACT:
An improved sump pump apparatus of submersible nature of the type in which a pump impeller is located above an intake opening for drawing sump water through the intake opening and expelling the same through a pump discharge connection. The pump impeller is immediately adjacent the top of the intake opening, the top of the intake opening including a lubricating surface and the impeller being positioned as closely as possible to the top. A debris trap is situated within the pump beneath the intake opening to capture small debris, such as sand and stones, which are drawn into the pump by the impeller. Air relief means is located the discharge outlet for the sump pump in particular situations.

REFERENCES:
patent: 220085 (1879-09-01), Milford
patent: 2406947 (1946-09-01), Harlamoff
patent: 2918016 (1959-12-01), Olson
patent: 3191364 (1965-06-01), Syluan
patent: 3776660 (1973-12-01), Anderson
patent: 3999890 (1976-12-01), Niedermeyer
patent: 4230440 (1980-10-01), Niedermeyer
patent: 4406594 (1983-09-01), Smaby

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