Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1990-06-21
1991-10-01
Britts, Ramon S.
Road structure, process, or apparatus
Pavement
Vault cover-closure
E02D 1900
Patent
active
050528513
ABSTRACT:
To provide a temporary cover for a maintenance hole (1, 31), over an edge (5) of which cables, hoses or other conduits (3, 83) extend, an inflatable balloon (10, 40, 50, 60, 70, 80) has hollow circumferential portions (41, 51, 61, 71, 81), for example generally in the shape of a tire or hollow disk, connected by a web (12), the balloon having a plan view configuration and dimension to fit into and, upon inflation, over the edge of the maintenance hole, and resiliently engaging around the edge of the maintenance hole, thereby preventing ingress of water, contaminants, animals and the like, without damage to the cables, hoses or conduits. Preferably, the balloon is a unitary structure made of distendable material such as rubber, plastic or the like, which may be fiber or textile reinforced.
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patent: 4826036 (1989-05-01), Lewis et al.
patent: 4867600 (1989-09-01), Bowman
Britts Ramon S.
Connolly Nancy
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