Structures for supporting manhole covers, grates and the...

Details Structures for supporting manhole covers, grates and the... Structures for supporting manhole covers, grates and the...

E - Fixed Constructions

02

D

94/12

E02D 29/14 (2006.01) B66F 19/00 (2006.01)

Patent

CA 1161293

STRUCTURES FOR SUPPORTING MANHOLE COVERS, GRATES AND THE LIKE PROVIDED WITH SELF-STORING ADJUSTABLE LEVELING APPARATUS 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 Or 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.

391868

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