Process and apparatus for obtaining samples of liquid and gas from soil
摘要
An apparatus and process for obtaining samples of liquid and gas from subsurface soil is provided having filter zone adjacent an external expander ring. The expander ring creates a void within the soil substrate which encourages the accumulation of soil-borne fluids. The fluids migrate along a pressure gradient through a plurality of filters before entering a first chamber. A one-way valve regulates the flow of fluid into a second chamber in further communication with a collection tube through which samples are collected at the surface. A second one-way valve having a reverse flow provides additional communication between the chambers for the pressurized cleaning and back-flushing of the apparatus.
申请公布号
US5889217(A)
申请公布日期
1999.03.30
申请号
US19960650473
申请日期
1996.05.20
申请人
ROSSABI, JOSEPH;MAY, CHRISTOPHER P.;PEMBERTON, BRADLEY E.;SHINN, JIM;SPRAGUE, KEITH
发明人
ROSSABI, JOSEPH;MAY, CHRISTOPHER P.;PEMBERTON, BRADLEY E.;SHINN, JIM;SPRAGUE, KEITH