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Title: Hydraulic pump with in-ground filtration and monitoring capability

A hydraulically operated pump for in-ground filtering and monitoring of ws or other fluid sources, including a hollow cylindrical pump housing with an inlet and an outlet, filtering devices positioned in the inlet and the outlet, a piston that fits slidably within the pump housing, and an optical cell in fluid communication with the pump housing. A conduit within the piston allows fluid communication between the exterior and one end of the piston. A pair of o-rings form a seal between the inside of the pump housing and the exterior of the piston. A flow valve positioned within the piston inside the conduit allows fluid to flow in a single direction. In operation, fluid enters the pump housing through the inlet, flows through the conduit and towards an end of the pump housing. The piston then makes a downward stroke closing the valve, thus forcing the fluid out from the pump housing into the optical cell, which then takes spectrophotometric measurements of the fluid. A spring helps return the piston back to its starting position, so that a new supply of fluid may enter the pump housing and the downward stroke can begin again. The pump may be used independentlymore » of the optical cell, as a sample pump to transport a sample fluid from a source to a container for later analysis.« less
 [1];  [2];  [2]
  1. (Augusta, GA)
  2. (Aiken, SC)
Issue Date:
OSTI Identifier:
United States of America as represented by Department of Energy (Washington, DC) SRS
Patent Number(s):
US 5569021
Contract Number:
Research Org:
Country of Publication:
United States
hydraulic; pump; in-ground; filtration; monitoring; capability; hydraulically; operated; filtering; fluid; sources; including; hollow; cylindrical; housing; inlet; outlet; devices; positioned; piston; fits; slidably; optical; cell; communication; conduit; allows; exterior; pair; o-rings; form; seal; inside; flow; valve; single; direction; operation; enters; flows; towards; makes; downward; stroke; closing; forcing; takes; spectrophotometric; measurements; spring; helps; return; starting; position; supply; enter; begin; independently; sample; transport; source; container; analysis; single direction; optical cell; flow valve; fluid enters; spectrophotometric measurements; hydraulic pump; hollow cylindrical; fluid communication; sample fluid; fluid source; pump housing; starting position; allows fluid; valve position; fluid sources; hydraulically operated; cylindrical pump; /417/250/356/