Sturdy adjustable manhole cover support

Details Sturdy adjustable manhole cover support Sturdy adjustable manhole cover support

1988-06-15

1989-09-19

Massie, IV, Jerome W.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, E02D 2914

Patent

active

048676012

ABSTRACT:
An improved manhole cover support adjustable in perimeter and adapted to raise the effective grade of an existing manhole cover receiving structure such as a manhole frame is shown. Integral and substantially coextensive with the upper part of its thin-walled lateral cover keeper portion is a reinforcing wale. The cover support can be in the form of a split ring or a plurality of joined segments. Advantageously, it can have bridged joints and a flexible, compressible retention member on at least a portion of its expanding outer wall member.

REFERENCES:
patent: 1908909 (1933-05-01), Manz
patent: 2109287 (1938-02-01), Elkington
patent: 3773428 (1973-11-01), Bowman
patent: 3891337 (1975-06-01), McCoy
patent: 4440407 (1984-04-01), Gagas
patent: 4582450 (1986-04-01), Neil
patent: 4657752 (1987-01-01), Centa
patent: 4763449 (1988-08-01), Vigneron et al.

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