Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-04-12
1992-04-21
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156156, 156287, 156294, 264 36, 264269, 264314, 264573, B29C 6328
Patent
active
051064405
ABSTRACT:
Cavities, such as manholes of differing sizes and shapes are repaired by an apparaatus that includes an inflatable bladder enveloped by a carrier formed of a resin-impregnated fiberglass fabric. A hoist lowers the bladder and fabric into the manhole and an air blower inflates the bladder until the fabric tightly overlies the inner walls of the manhole. The resin then cures in situ. The liner so created forms a monolithic whole that is impervious to water and silt and prevents further crumbling and deterioration of the inner surfaces of the manhole. The bladder is deflated and retracted after the resin in the fabric has cured.
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Ball Michael W.
Maki Steven D.
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