Manhole assembly
AssigneeGeneva Pipe and Precast Company
InventorJed Christopher Friesen
Life of this patent
Estimating the term…
Abstract
A manhole assembly including a base, riser, and cap. The base having an upper surface forming a bench, a bottom surface, and a radially outward surface with penetrations there through; and a radial spigot in the radially outward upper edge of the base. The base having a corrosive-resistant layer covering the channels, bench, and radial spigot. Also disclosed is a riser comprised of a corrosive-resistant polymer pipe having a radially outward surface, an inner surface and a bottom surface in contact with, supported by, and sealed to the radial spigot. The cap having a radial spigot, and access hole; the radial spigot in the radially outward bottom edge of the cap resting upon and sealed to an upper edge of the riser. The radially outward surface of the cap and base are aligned with the radially outward surface of the riser.
Claims12
A manhole assembly comprising:
- an annular radial spigot placed at a radially outward facing upper edge of a manhole base;
- the annular radial spigot having a substantially vertical surface and a cooperating horizontal surface to form the spigot for receiving a manhole riser;
- the manhole riser comprised of a corrosive-resistant structural polymer pipe having an inner surface sealed to the radial spigot and a bottom surface in contact with, supported by, and sealed to the radial spigot, the manhole riser being a length of straight pipe having a constant outer diameter, the length of straight pipe being without a bell structure on either end;
- a manhole cap comprising;
- a radial spigot in a radially outward facing bottom edge of the manhole cap;
- the radial spigot in the radially outward bottom edge of the manhole cap contacting the inner surface of the manhole riser;
- and
- the manhole cap resting upon and supported by an upper edge of the manhole riser, the manhole cap having an outer diameter equivalent to and substantially aligned with the outer diameter of the manhole riser.
Dependencies are inferred from the claim text.