Manhole-pit lining and method of making and installing same

Details Manhole-pit lining and method of making and installing same Manhole-pit lining and method of making and installing same

1977-02-14

1978-07-25

Perham, Alfred C.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

52182, 52742, 137363, E02D 2914

Patent

active

041020880

ABSTRACT:
A manhole-pit lining is formed of a base, a tubular middle portion, and a top to which a manhole cover is fittable. The base is custom-made in accordance with the particular requirements of the pit being lined. The middle tube provided with pipe connections is then fitted over this base with the pipe connections aligned with the trough formed in the base and is secured thereto by means of an epoxy resin. The middle and base are then placed in an excavation and the pipe connections on the middle are hooked up to the pipes to be joined at the manhole pit. The cover is secured to the top and the excavation is then backfilled. The entire assembly is made of waterproof reinforced concrete and the middle tube itself may be constituted as a standard waterproof pipe section.

REFERENCES:
patent: 613534 (1898-11-01), Swan
patent: 1639495 (1927-08-01), Frame
patent: 1755608 (1930-04-01), Lemmerman
patent: 3212519 (1965-10-01), Paschen
patent: 3258888 (1966-07-01), Lum

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