초록 ▼

An improved manhole cover support adapted to raise the effective grade of an existing manhole cover receiving structure such as a manhole cover frame is shown. Integral with and substantially coextensive with the top of its thin-walled cover keeper portion is a stiffening wale that defines a cavity.

An improved manhole cover support adapted to raise the effective grade of an existing manhole cover receiving structure such as a manhole cover frame is shown. Integral with and substantially coextensive with the top of its thin-walled cover keeper portion is a stiffening wale that defines a cavity. The cavity can be, for example, rectangular or arcuate, and it can contain a cohesive or other filler solid. The cover support need not be adjustable in perimeter, and wale need not be continuous but interrupted adjacent ends can be joined. The cover support can have water seals of compressible polymer that are interposed between its cover seat and the cover that it is to accept, and between its outer perimeter and the upper surface, e.g., paving, into which it is set and/or the shoulder of the existing manhole cover receiving structure where it sits. At least part of the sealing elements can be adherent to the cover support.

대표청구항 ▼

A manhole cover support for emplacing into and raising the effective grade of an existing manhole cover receiving structure that has an upwardly-extending shoulder surface, the cover support comprising a base portion with a seat portion, and a lateral keeper portion that is integral with the base po

A manhole cover support for emplacing into and raising the effective grade of an existing manhole cover receiving structure that has an upwardly-extending shoulder surface, the cover support comprising a base portion with a seat portion, and a lateral keeper portion that is integral with the base portion, the transverse wall thickness of the keeper portion being substantially less than the corresponding transverse thickness of the base, the outer wall of the base portion facing said shoulder surface, the keeper portion projecting upwardly from the seat, the cover support including a hollow stiffening wale that is integral with and substantially coextensive with the top of the keeper portion.