1994-12-28
1996-04-16
Freay, Charles
Pumps
Processes
417 63, 417900, 73239, F04B 2100
Patent
active
055076246
ABSTRACT:
The present invention is a sludge pump system which includes a means for monitoring operation of a sludge pump. The sludge pump includes a material cylinder and a piston moveable in the material cylinder. A pump drive moves the piston during working cycles which include a pumping stroke and a filling stroke. A pump valve mechanism connects the material cylinder to an outlet during pumping strokes and connects the material cylinder to an inlet during filling strokes. A means for monitoring operation of the pump is provided. The means for monitoring includes a means for sensing a first parameter related to operation of the pump drive, a means for sensing a second parameter indicative of operation of the piston, and a means for determining errors in the operation of the pump based upon the first parameter and the second parameter.
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patent: 4545736 (1985-10-01), Walton
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patent: 4790728 (1988-12-01), Dwyer
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patent: 5318409 (1994-06-01), London et al.
patent: 5336055 (1994-08-01), Anderson
patent: 5401140 (1995-03-01), Anderson
Freay Charles
Friedrich Wilhelm Schwing GmbH
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