Structures for supporting manhole covers, grates and the like provided with self-storing adjustable leveling apparatus
OwnerFrancis LeBaroninventor
Life of this patent
Estimating the term…
Abstract
This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.
Claims7
Apparatus for providing adjustable leveling of manhole covers, grates and the like within ground and similar structures, having, in combination, a tubular slip ring for supporting a cover, grate and the like near its upper edge, a base ring having a bottom flange mounting a tubular vertical sleeve positioned to receive the slip ring in coaxial telescopic relationship, and resilient spacer ring means fitted under tension coaxially against a wall of the slip ring near its lower edge and adapted, upon lifting of the slip ring along the base ring sleeve, to be forced down and snapped under the said lower end of the slip ring and against the base ring flange, to elevate the level of the slip ring and thus that of the manhole cover, grate and the like.
Dependencies are inferred from the claim text.