Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1990-05-01
1991-10-08
Kisliuk, Bruce M.
Road structure, process, or apparatus
Pavement
Vault cover-closure
52 20, 220 37, 220 38, E02D 2914, H02G 308
Patent
active
050549561
ABSTRACT:
A covering device for detachably shielding an access hole which is provided on the top portion of a conduit box, includes a fixing member having a peripheral wall defining a top opening and a bottom opening and a base protruding inwardly therefrom; a plurality of bolts being fixed on the base of the fixing member; a plurality of supporting members respectively surrounding the bolts and piled up along the same bolts; a suspension member having a peripheral wall defining an upper opening and a lower opening and a bottom plate protruding inwardly therefrom and being supported by the supporting members. The supporting members are being detachable and replaceable so that the wall of suspension member can be raised or lowered thus enabling the cover of conduit hole to be adjusted to a level with a changing road surface.
REFERENCES:
patent: 1076386 (1913-10-01), O'Day
patent: 3318476 (1967-05-01), Clark
patent: 3408778 (1968-11-01), Mason
patent: 3930739 (1976-01-01), Larsson et al.
patent: 4548230 (1985-10-01), Feit
patent: 4621941 (1986-11-01), Ditcher et al.
patent: 4909692 (1990-03-01), Hendren
patent: 4925337 (1990-05-01), Spiess et al.
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