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US 5,295,535 AGranted
Cover for an observation well
AssigneeThe Boles Company, Inc.
InventorsClaude C. Boles, Lester D. Boles
Life of this patent
Estimating the term…
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AssigneeThe Boles Company, Inc.
InventorsClaude C. Boles, Lester D. Boles
Estimating the term…
Contamination of the sampling portion of an observation well is avoided while providing axial float between the observation well cover and observation well liner by this observation well cover. The observation well cover includes a manhole ring that is set in a raised area of concrete. A manhole cover is fit on the ring and a liner cover fits underneath the ring. The liner cover has a trap to collect contamination. The walls of the screen cover slidingly mate with a wall and, of an 8-inch to 12-inch observation well liner and, respectively. The inner wall of the trap access hole slidingly mates with the outer wall of a 2-inch or a 4-inch observation well liner. This observation well cover provides axial float of the liner relative to the observation well cover while maintaining sealing integrity.
In an observation well for detecting leakage from an underground storage tank, the well having a tubular perforate liner extending downwardly from the ground surface, the ground surface being covered with a layer of paving material, a well cover comprising:
In an observation well for detecting leakage from an underground storage tank, the well having a tubular, liquid perforate well liner extending downward from the ground surface, the upper end of the liner being surrounded by a raised paved layer, a well cover, comprising:
In an observation well for detecting leakage from an underground storage tank, the well having a tubular perforate liner extending downwardly from the ground surface, the ground surface being covered with a layer of paving material, a well cover, comprising:
Dependencies are inferred from the claim text.