Pumps – Motor driven – Electric or magnetic motor
Patent
1993-07-12
1995-07-11
Bertsch, Richard A.
Pumps
Motor driven
Electric or magnetic motor
41742311, 415230, F04D 2910
Patent
active
054315484
ABSTRACT:
Pump apparatus for an evaporative cooler includes an impeller housing sealed on its top wall by a closed cell foam element and a bearing and seal element. The impeller housing has only one water inlet and one water outlet. The sealing of the impeller housing allows the level of the water in which the pump is disposed to be substantially lower than with prior art pumps, and substantially eliminates air intake into the impeller housing except through the one water inlet. Water outflow is only through the impeller housing outlet. Two embodiments are illustrated.
REFERENCES:
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patent: 5055006 (1991-10-01), Kobayashi et al.
patent: 5061157 (1991-10-01), Arakawa
patent: 5205725 (1993-04-01), Pattison
Bertsch Richard A.
Korytnyk Peter
Shields H. Gordon
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