Manhole cover support
OwnerHarold M. Bowmaninventor
Life of this patent
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Abstract
An adjustable support for varying the height of a manhole cover after a street surface has been resurfaced is presented including vertically disposed posts in a downward position on each end of each adjustable section. These posts provide the location for bolts connecting adjacent ends of two adjustable sections so that the entire structure permits the units to be expanded and contracted to fit a plurality of different diameters of manholes. Also an upwardly extending radially outwardly positioned projection on the outer surface of the base member of the adjustable section ensures a more stable engagement of the base member of the adjustable section with the manhole housing on which it is adapted to rest.
Claims9
A sectional manhole cover support for vertically adjusting the level of a manhole cover in the opening of a manhole housing to a new road grade, wherein said manhole housing has at its upper edge an arcuate recess opening upwardly and also radially inwardly;
- each section of said support comprising generally arcuate base members adapted to be fixed within said opening against vertical movement downwardly in use thereof;
- said members comprising a plurality of arcuate base members collectively substantially forming a ring with an upper horizontal linear surface for supporting said manhole cover at a raised level;
- each of said base members having an integral downwardly extending post near each end thereof;
- each of said posts having respectively right-hand and left-hand threads in adjacent ends of each pair of base members;
- whereby coacting adjustable threaded bolt means may be affixed between adjacent posts for moving the sections of said base member circumferentially apart to expand said base member within said opening of said manhole housing to tightly engage said housing.
Dependencies are inferred from the claim text.