De-sludging systems

Details De-sludging systems De-sludging systems

1991-02-01

1992-11-10

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 46, 417390, 417900, 210741, F04B 4902, F04B 4908

Patent

active

051619547

ABSTRACT:
Apparatus for periodically drawing accumulated sludge (12) from a settlement tank (10) includes a hydraulically powered ram type positive displacement pump (14), operation thereof being controlled automatically in a timed or other sequence in response to signals derived from a pressure transducer (34), conveniently in the hydraulic supply line (24), said signals being a function of the pressure exerted by the pump ram (22) in operation and hence the density or other properties of the material being handled by the pump, a higher pressure showing the presence of sludge and a lower pressure its absence.

REFERENCES:
patent: 3477380 (1969-11-01), Johanson et al.
patent: 4439325 (1984-03-01), Blais

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