Split-ring manhole cover support

Details Split-ring manhole cover support Split-ring manhole cover support

1990-10-12

1993-02-09

Britts, Ramon S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

E02D 2914

Patent

active

051849127

ABSTRACT:
The grip of the collar element of an existing circular manhole cover-supporting structure, such as a circular manhole frame, on a split-ring style expansion-joint-fitted manhole cover support inserted into, surrounded by, and forced by expansion against said collar element is improved by having selective stiffener means disposed in a sector of the cover support that is generally opposite to the expansion joint thereof, the stiffener means suppressing the tendency of the corresponding sector of the base ring to pull away from the collar element.

REFERENCES:
patent: 1758515 (1930-05-01), Heiermann
patent: 1908909 (1933-05-01), Manz
patent: 2595787 (1952-05-01), Heimann
patent: 3701303 (1972-10-01), Kondo
patent: 3858998 (1975-01-01), Larsson et al.
patent: 3891337 (1975-06-01), McCoy
patent: 4097171 (1978-06-01), Fier
patent: 4225226 (1980-09-01), Fier
patent: 4302126 (1981-11-01), Fier
patent: 4582450 (1986-04-01), Neil
patent: 4614065 (1986-09-01), Papp
patent: 4987650 (1991-01-01), Eickmann

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