Pumping system for groundwater sampling

Details Pumping system for groundwater sampling Pumping system for groundwater sampling

1996-04-26

1997-03-18

Gluck, Richard E.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417118, 417149, F04B 106

Patent

active

056116713

ABSTRACT:
A pump assembly for the accurate transfer of water to an above ground elevation includes a tubular housing having an upper extremity equipped with a gas inlet port, and a lower extremity equipped with a water inlet port having a first check valve. A second check valve divides the housing into upper and lower chambers. A sampling port located within the lower chamber communicates with a conduit that extends to an above-ground elevation. A third check valve, disposed within the conduit, permits upward flow but not downward flow of water in the conduit. A pumping apparatus is provided by combining the pump assembly with a gas controller located above ground level and which supplies gas at controlled pressure, volume and timed intervals to the gas inlet port.

REFERENCES:
patent: 8834 (1835-05-01), Curtis
patent: 298990 (1884-05-01), Leedy
patent: 3814545 (1974-06-01), Waters
patent: 3963377 (1976-06-01), Elliott et al.
patent: 3991825 (1976-11-01), Morgan
patent: 4489779 (1984-12-01), Dickinson et al.
patent: 5004405 (1991-04-01), Brestin
patent: 5183391 (1993-02-01), Fiedler

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