Universal manhole adjusting ring

Road structure – process – or apparatus – Pavement – Vault cover-closure

Patent

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Details

52 20, E02D 2914

Patent

active

045824509

ABSTRACT:
An adjustment ring for raising a cover which fits over an opening of a casting fixed in a road surface is provided and comprises a plurality of ring sections mounted upon the casting. Each section has spaced apart first and second ends with the first end of each section being adapted to overlap the second end of each adjacent section such that the overlapping ends of the consecutively adjacent sections form the ring into a shape complimentary to that of the casting. The overlapping sections are secured to one another by screws. The perimeter of the ring can be adjusted by altering the extent of overlap between adjacent sections. Each section includes a support surface for supporting the cover or grate.

REFERENCES:
patent: 2109287 (1938-02-01), Elkington
patent: 3218943 (1963-09-01), Bowman
patent: 3773428 (1973-11-01), Bowman
patent: 3968600 (1976-07-01), Bowman
patent: 4187647 (1980-02-01), Hall
patent: 4281944 (1981-08-01), Bowman
Engineering News Record, "Rattlefree and Easily Shimmed", 1957.

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