Containment manhole
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United States of America Patent
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Jan 30, 1990
Issued Date -
N/A
app pub date -
Jun 30, 1989
filing date -
Feb 24, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A containment manhole is formed of an upper rim and a bottom sump portion connected by an expansion joint permitting radial and axial movement of the sump portion relative to the rim. The sump portion has an integrally formed drain for the drainage of spilled product in the manhole directly into the riser. The rim also has an upstanding flange and the lid of the manhole extends over the flange with a wide, downwardly sloped skirt directing water off the lid to the outer perimeter.
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