Rehabilitated manhole cover

Details Rehabilitated manhole cover Rehabilitated manhole cover

1984-07-12

1986-07-01

Leppink, James A.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, 220287, 220307, E02D 2914

Patent

active

045976929

ABSTRACT:
A rehabilitated manhole cover and method of producing the same. To rehabilitate the manhole cover for a sanitary sewer system, a removable plug is inserted in one of the vent holes in the cover, while a permanent seal is applied to the remaining vent holes. A pneumatic gasket is installed with an adhesive on the annular ledge in the manhole casting and the cover when installed rests on the ledge and compresses the gasket to provide a seal between the cover and the casting. To properly center the cover, holes are drilled in the peripheral edge of the cover and metal rivets installed within the holes. Each rivet is provided with an enlarged head which projects outwardly from the cover and can be spaced from the peripheral edge of the cover by shims or spacers to thereby maintain the peripheral edge of the cover is close proximity to the manhole casting. By removing the removable plug the cover can be removed from the manhole in a conventional manner by using a pick.

REFERENCES:
patent: 783702 (1905-02-01), Olds
patent: 1485512 (1924-03-01), Cocq et al.
patent: 2664334 (1953-12-01), Bissmann
Clearwater Technologies Inc. Brochure (4 pp.), Feb. 1983.

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