Manhole assembly with removable cover, especially for a carriage

Details Manhole assembly with removable cover, especially for a carriage Manhole assembly with removable cover, especially for a carriage

1976-02-06

1977-04-05

Faw, Jr., Price C.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

137371, 404 25, E02D 2914

Patent

active

040153738

ABSTRACT:
A flat outer frame is provided with an edge-section for receiving a single-piece manhole cover which has three projections located at the apices of a triangle and adapted to rest on the edge-section so as to form a horizontal bearing triangle. Means are provided for locking the cover within the frame so as to prevent tilting of the cover about any one side of the bearing triangle under the action of a downwardly directed force applied to the cover externally of the triangle.

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