Manhole with extension wings
AssigneeWilkinson Heavy Precast
InventorJohn Tran-Quoc-Nam
Life of this patent
Estimating the term…
Abstract
A manhole for a storm sewage system comprising a structure having at least two outwardly extending substantially vertical flat panels projecting outwardly from the exterior surface a predetermined distance on opposite sides of the base portion of the manhole.
Claims8
A manhole comprising a hollow precast structure in the form of a tank having an interior and exterior surface, comprising a base portion and an upper manhole portion affixed to said base portion, said base portion having substantially vertical walls extending a predetermined distance below said manhole portion, said base portion having at least two outwardly extending substantially vertical flat panels projecting outwardly from the exterior surface a predetermined distance on oposite sides of said base portion.
A manhole comprising a hollow precast concrete vault having a top and a bottom, and having access openings for at least a storm sewer inlet, and a storm sewer outlet therein, an access opening in the top of said vault for inspection and cleaning said vault, said vault having two outwardly extending vertical flat panels of predetermined dimensions projecting from an exterior surface on opposite sides of said vault.
Dependencies are inferred from the claim text.