Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1997-02-21
1998-12-01
Graysay, Tamara L.
Road structure, process, or apparatus
Pavement
Vault cover-closure
404 2, 404 26, E02D 2914, E01C 1122
Patent
active
058428119
ABSTRACT:
A confined space manhole sign system for use in association with a manhole including a ledge and a manhole cover, the apparatus comprises a plurality of manhole insert members each having a circular base with an upper surface, an upstanding sidewall extending from the base and being formed contiguously therewith, two drain apertures being positioned at the intersection of the base and the sidewall, a flange being formed contiguously with the upstanding sidewall and extending radially therefrom, the flange having a lower surface including a plurality of perforation grooves formed therein; and a plurality of warning signs each having descriptive indicia marked thereupon, each of the warning signs being fixedly positionable upon the upper surface of the base, the system warning manhole workers of potentially dangerous situations within a manhole.
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Graysay Tamara L.
Singh Sunil
LandOfFree
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