Floating manhole frame assembly

Abstract

A manhole frame assembly according to one embodiment of the present invention generally includes an upper frame and a lower frame, and is adapted to support a manhole cover. The upper frame may be allowed to float with respect to the lower frame, enabling the upper frame to move during installation, or as the surrounding structure moves, or both. By being capable of movement, the upper frame may potentially prevent uneven transitions between the manhole frame assembly and the surface of the surrounding structure.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a floating manhole frame assembly, and more particularly to a manhole frame assembly configured to move as the surrounding environment moves.[0002]Manhole frame assemblies are well known. Generally, a manhole frame assembly covers an opening providing access to an underground area also known as a manhole that may include utilities, pipes, cables and passages. The manhole frame assembly may be fitted with a cover to, among other things, prevent someone from falling in and to keep unauthorized persons out. Conventional manhole frame assemblies include a frame capable of receiving a cover that limits access to the manhole. The cover is a removable plate forming the lid over an opening in the frame through which the underground area may be accessed. The manhole cover seats on the frame, sometimes flush with the surface of a road. And, the frame, often times, is secured to the underground area or surrounding structure, suc...

AI Technical Summary

Benefits of technology

The present invention is a manhole frame assembly that is designed to be installed on an underground area and can move smoothly in response to changes in the surrounding structure. This allows for a seamless transition between the frame and the surface of the structure. The assembly also includes a sleeve that prevents the frame from binding to the structure and allows for movement and tilting of the frame. This results in a smooth and continuous connection between the frame and the structures. Overall, the invention provides a solution to mitigate abrupt transitions and ensure a seamless connection between the manhole frame and the surrounding structure.

Problems solved by technology

Thus, even if the manhole frame assembly, when fitted with a cover, is installed flush with the surrounding surface (e.g., the road surface), shifts in the surrounding structure may result in an uneven surface.

Another event, soil erosion, may cause movement in the surrounding structure as well.

As mentioned previously, many conventional manhole frame assemblies are unable to move in harmony with the ground or the surrounding structure.

This inability to move is a common drawback of conventional manhole cover assemblies because it can result in a rough road surface or an abrupt transition between the surrounding surface and the manhole frame assembly.

Uneven features in the roadway may increase wear on any vehicles traveling over the roadway.

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