Temporary drain cover

Details Temporary drain cover Temporary drain cover

1992-08-04

1995-01-10

Friedman, Carl D.

Static structures (e.g., buildings)

Article or material supported cover

52410, 5216914, 4581, 428198, 428920, F04B 500, F04D 514

Patent

active

053795555

ABSTRACT:
In accordance with the invention, the device is provided for constructing a temporary cover for a drain opening surrounded by a framing surface of horizontal, curved or irregular shape, comprising M sheets of flame and/or chemical resistant materials in broad surface contact defining coextensive top and bottom surfaces, said top and bottom surfaces each including a smooth, non-quilted central section and an outer edge section in integral contact with said central section, said outer edge sections together defining a series of undulations therebetween, weighted chain means inserted within said series of undulations so as to add loft and weight as a function of radial extent whereby sealing pressure of said bottom surface relative to an associated horizontal, slightly curved or irregular attaching surface is surprising strong. Method steps related to use and manufacture are also recited.

REFERENCES:
patent: 2742391 (1956-04-01), Warp
patent: 3420227 (1969-01-01), Voorles
patent: 4747241 (1988-05-01), Whitman
patent: 4778544 (1988-10-01), Jones et al.
patent: 4793116 (1988-12-01), Whitman
patent: 4833005 (1989-05-01), Klaar et al.
patent: 4894875 (1990-01-01), Oxley et al.
patent: 4950526 (1990-08-01), Singleton
patent: 5157893 (1992-10-01), Benson et al.
patent: 5204148 (1993-04-01), Alexander et al.
patent: 5251414 (1993-10-01), Duke

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