Liquid purification or separation – Flow – fluid pressure or material level – responsive – Check valve
Patent
1988-02-04
1989-09-05
Hruskoci, Peter
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Check valve
210137, 210138, 210406, 2104161, 210474, 417 12, 417411, 422101, B01D 2900
Patent
active
048635936
ABSTRACT:
Battery powered vacuum unit, useful for suction filtration of water samples in the field. The vacuum unit comprises a miniature piston type air suction pump, driven by a small direct current (DC) motor which in turn is powered by a battery or other 12 volt DC power source. The motor may be controlled by a timer. The motor has a maximum power requirement of about 75 Watts and the suction pump has the ability to produce a vacuum of at least about 12.5 mm of mercury. The entire unit is preferably self-contained in a single housing, and preferably weighs no more than about 5 kilograms (11 pounds).
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Brown et al. "Methods for Collection and Analysis of Water Samples for Dissolved Minerals and Gases", from Techniques of Water Resources Investigations of the USGS, Book 5, Chapter A1, 1979, pp. 4-18.
Hruskoci Peter
The University of Akron
Upton Christopher
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